{"Bibliographic":{ "Title":"Southern Lake Michigan chemical and physical characteristics data for 1975 /", "Authors":"Bell, Gerald L.", "Publication date":"1980", "Publisher":"U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Great Lakes Environmental Research Laboratory" }, "Administrative":{ "Date created":"02-21-2025", "Language":"English", "Rights":"CC 0", "Size":"0004445348" }, "apiVersion": "2024-07-31-preview", "modelId": "prebuilt-read", "stringIndexType": "textElements", "content": "Qc 802 . U6 G5 no.13 c.1\nGREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, LIBRARY OAA Data Report ERL GLERL-13 2300 WASHTENAW AVENUE ANN ARBOR, ML 48104\nCOMM\nMERCE\nRICA\nSTATES OF\nSOUTHERN LAKE MICHIGAN CHEMICAL AND PHYSICAL\nCHARACTERISTICS DATA FOR 1975\nGerald L. Bell\nGreat Lakes Environmental Research Laboratory Ann Arbor, Michigan January 1980\nGLERL LIBRARY\nnoaa\nNATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION 1\nEnvironmental Research Laboratories\nGREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, LIBRARY 2300 WASHTENAW AVENUE ANN ARBOR, MI. 48104\nNOAA Data Report ERL GLERL-13\nSOUTHERN LAKE MICHIGAN CHEMICAL AND PHYSICAL CHARACTERISTICS DATA FOR 1975\nGerald L. Bell\nGreat Lakes Environmental Research Laboratory Ann Arbor, Michigan January 1980\nGLERL LIBRARY\nNOAA\nDEPARTM\nUNITED STATES DEPARTMENT OF COMMERCE Philip M. Klutznick, Secretary\nNATIONAL OCEANIC AND\nATMOSPHERIC ADMINISTRATION Richard A. Frank, Administrator\nEnvironmental Research\nLaboratories Wilmot N. Hess, Director\nNOTICE\nThe NOAA Environmental Research Laboratories do not approve, recommend, or endorse any proprietary product or proprietary material mentioned in this publication. No reference shall be made to the NOAA Environmental Research Laboratories, or to this publication furnished by the NOAA Environmental Research Laboratories, in any advertising or sales promotion which would indicate or imply that the NOAA Environmental Research Laboratories approve, recommend, or endorse any proprietary product or proprietary material mentioned herein, or which has as its purpose an intent to cause directly or indirectly the advertised product to be used or purchased because of this NOAA Environmental Research Laboratories publication.\n/34880 3PBL\nii\nCONTENTS\nPage\nAbstract\n1\n1. INTRODUCTION\n1\n2. METHODS\n2\n2.1 Sampling Program\n2\n2.2 Chemical Analyses\n20\n3. PRECISION LIMITS\n21\n4. DATA PRESENTATION 23\n5. ACKNOWLEDGMENTS\n23\n6. REFERENCES\n24\nAppendix A. LIMNOLOGICAL DATA\nMicrofiche\nAppendix B. WIND, WAVE, AND SEDIMENT DATA\nInside\nAppendix C. STATISTICAL SUMMARY -\nBack Cover\n\u00a3\niii\nFIGURES\nPage\n1. Station locations in Southern Lake Michigan during 1975. 3\n2. Station locations at Little Sable Point, Mich., during 1975. 4\n3. Station locations at Grand Haven, Mich., during 1975. 5\n4. Station locations at St. Joseph, Mich., during 1975. 6\n5. Station locations at Manitowoc, Wis., during 1975. 7\n6. Station locations at Port Washington, Wis., during 1975. 8\n7. Station locations at Kenosha, Wis., during 1975. 9\n8. Station locations at Michigan City, Ind., during 1975. 10\niv\nTABLES\nPage\n1. Station locations in Lake Michigan during 1975 (by latitude and longitude) . 11\n2. Station locations at Little Sable Point, Mich., during 1975 (by latitude and longitude) . 12\n3. Station locations at Grand Haven, Mich., during 1975 (by latitude and longitude) . 12\n4. Station locations at St. Joseph, Mich., during 1975 (by latitude and longitude) . 13\n5. Station locations at Manitowoc, Wis., during 1975 (by latitude and longitude) . 14\n6. Station locations at Port Washington, Wis., during 1975 (by latitude and longitude) . 15\n7. Station locations at Kenosha, Wis., during 1975 (by latitude and longitude) . 16\n8. Station locations at Michigan City, Ind., during 1975 (by latitude and longitude) . 17\n9. Cruise schedule. 18\n10. Shipboard and laboratory measurements in connection with limnological studies. 19\n11. Measurement precision. 22\nV\nSOUTHERN LAKE MICHIGAN CHEMICAL AND PHYSICAL CHARACTERISTICS DATA FOR 1975*\nGerald L. Bell\nWater samples at standard depths, bottom sediment, and meteorological data were collected at established stations in Southern Lake Michigan, in six harbors, and at one nearshore site during the 1975 open-water season. There were 5 lake cruises and 9 to 11 one-day cruises at each harbor. The samp- ling programs and analytical methods are described. Chemical characteristics of the water and of the bottom sediment sampled during one cruise are listed by cruise for each station and sampling depth. Wind, wave, and sediment data are listed by cruise for each station. The statistical summaries showing lake-wide means, standard deviations, and sample sizes of se- lected variables are presented by depth for each lake cruise period. These means do not include the harbor data.\n1. INTRODUCTION\nThis basic data report presents data collected aboard the Research Vessel Shenehon between 28 May and 24 November 1975 in Southern Lake Michigan and at seven harbor and nearshore areas by the Chemistry- Biology Group of the U. S. Department of Commerce, NOAA, Great Lakes Environmental Research Laboratory (GLERL) .\nThe GLERL Priority Initiatives Workshop in 1974 resulted in a general agreement that the nearshore zone should be the area of principal focus (Pinsak, 1975) . In line with this objective, an investigation was conducted by GLERL during 1975 under Task 6.6 to describe the broad aspects of the spatial and temporal variability of selected variables in the nearshore environment at sites chosen to reflect a wide range of conditions, to compare the nearshore and open lake environment, and to establish gradients through the nearshore environment (GLERL, 1975) .\nSouthern Lake Michigan is subject to a wide range of stresses imposed by municipal, industrial, and agricultural input as well as natural input from streams. An understanding of the variations within the nearshore area is essential to the development and use of this resource. Although a number of significant studies have been conducted in Lake Michigan, the majority of these have been limited to the open lake or to a specific area or problem, and have not been designed to study the variability of different segments of the nearshore area and to compare the areas with each other and the open lake. These data provide information useful in determining the relative roles of the inshore and open-lake areas in the total system, gaining insights into the nearshore variability, managing the coastal zone, and designing new studies in this as well as the other Great Lakes.\n*GLERL Contribution No. 178.\nInterpretations of the data are not within the scope of this report and will be presented in subsequent publications. Neither meteoro- logical conditions, nor profiles of water temperature and transparency recorded at each station are included in this report. One report on these data is available (Bell and Chambers, 1976) .\n2. METHODS\n2.1 Sampling Program\nWater characteristics, bottom sediment, and meteorological data were collected at seven harbor and nearshore areas and along lake traver- ses (Figures 1-8, Tables 1-8) .\nSurveys of 2 days each were conducted at Manitowoc, Port Washington, and Kenosha, Wis .; Michigan City, Ind .; and St. Joseph, Grand Haven, and Little Sable Point, Mich. (Table 9). There were a total of 9 surveys at Michigan City, 11 at Port Washington, and 10 at the other ports. Five regional lake cruises were conducted at 37 stations to connect the 7 sites so that the characteristics of each area could be related. The lake station network includes stations at or in the vicinity of earlier surveys.\nTwo types of surveys were conducted. Samples were taken the first day at a given site and along all lake traverses at standard depths for analysis aboard the R/V Shenehon and at the GLERL Ann Arbor laboratory. Samples collected at standard depths during the second day at a given site were analyzed aboard ship. In selected nearshore areas, specific conductance measurements were made every 6 min on samples collected at a depth of 1.5 m from the ship's intake system while underway. The shipboard and laboratory determinations made during each cruise are summarized in Table 10.\nThe ship was navigated and stations were established by using a gyro compass, radar, a sextant, and visual fixes. Loran C equipment was installed prior to the start of the first survey. Positioning tests gave satisfactory results in western Lake Erie, but were too erratic in southern Lake Michigan. Water sample depths were determined by a meter wheel to the nearest meter. The water depth to the bottom was determined by a Raytheon Precision Survey Fathometer, Model DE-723B, with a range of 0 to 250 in feet or fathoms and the depth presented as a graphic record on a calibrated paper chart.\nWater samples were taken at multiple levels in 5-1 Niskin bottles. Samples from stations located in shallow water were taken at the surface, mid-depth, and near bottom. In the upper 100 m, samples from stations located in deep water were taken at the surface and spaced at 10-, 20-, or 25-m intervals. Below 100 m the deepest sample was taken near the bottom. The one representative set of bottom sediment samples collec- ted from each area was taken with a Shipek Sampler.\n2\n88\u00ba\n87\u00ba\n86\u00b0\n85\u00b0\n46\u00b0\n46\u00b0\nManistiqueg\n20\nEscanabad\nO\nMackinaw City\n0\n0\n0\n2\nMenominee o\n6 Sturgeon Bay\n0\n45\u00ba\nTraverse\nCity\n.Frankfort\nGreen Bay5\nKewauneed\n1\nManistee\nManitowoc g. 32\n\u00b7 33\n44\u00ba\n44\u00b0\n. 34\n36. 2\n37.\n\u00b7 35\n111 6Pentwater\nSheboygan de 82\n110 \u00b7 Little Sable Pt.\n\u00b7 83\n. 84\n. 85\n109 .\nPort Washington o 86\n. 87\n. 88\n\u00b7 89\n107\n44 Muskegon\n. 90\n91% Grand Haven\n43\u00ba\n. 93\n1 94\n106 8 Holland\n105\n. 95\nKenosha de 96\n104 .\n. 97\n103 6 South Haven\n102\n. 98\n101 6 St. Joseph\n42\u00aa\n599\nChicago\nCalumet Indiana Hbr. #\n100 % Michigan City\nKILOMETERS\n20\nO\n20\n40\n60\n80\n100\nSTATUTE MILES\n20\nO\n20\n40\n60\n88\u00b0\n87\u00b0\n86\u00b0\n85\u00b0\nFigure 1. Station locations in Southern Lake Michigan during 1975.\n3\n43\u00b0\nMilwaukee\n92 .\nLudington\n\u00b7 81\n108 Whitehall\n42\u00b0\n\u00b0Gary\nCharlevoix\n45\u00b0\n43.68\u00b0\nLittle Sable Point, Michigan\n43.67\u00ba\n.6\n.5\n.4 .3 .2\n43.66\u00b0\n\u00b7 7\n\u00b78\n\u00b7 1\n43.65\u00b0\n4\n43.64\u00ba\n\u00b79\n\u00b7 10\n\u00b711 .12 .13\n43.63\u00ba\nKilometers\n1\n0\n1\n2\n43.62\u00ba\n86.63\u00b0\n86.62\u00b0\n86.61\u00b0\n86.60\u00b0\n86.59\u00ba\n86.58\u00b0\n86.57\u00ba\n86.56\u00b0\n86.55\u00b0\n86.54\u00b0\n86.53\u00ba\nFigure 2. Station locations at Little Sable Point, Mich., during 1975.\n43\u00b0\n86\u00b022'\n86\u00b020'\n86\u00b018'\n86\u00b016'\n86\u00b014'\n06'\nVICINITY MAP\nMICHIGAN\n06'\nMILES\n20 0.\n50\n0\nN\n1\nKILOMETERS\n1\n.5\n0\n1\n2\nSTATUTE MILES\nGRAND HAVEN\n1\n5\n0\n1\nILLINOIS\nINDIANA\n.6\n7\n.8\n.9\n43\u00ba\n10\n04*\n11\n2\n5\n.16 .17 .18\n.15\n.14\n.12\n13\n43\u00ba\n02'\n02'\n43\u00ba\n01.\n01'\n86\u00b022'\n86\u00b020'\n86\u00b018'\n86\u00b016'\n86\u00b014'\nFigure 3. Station locations at Grand Haven, Mich., during 1975.\n.3\n.4\n5\nGRAND RIVER\n.1/43\u00ba\n04'\nGRAND HAVEN MICHIGAN\nWISCONSIN\nMICHIGAN\nLAKE MICHIGAN\n43\u00ba\n43\u00ba\n43\u00ba\n42.20\u00b0\nSt. Joseph, Michigan\n.13\n42.18\u00b0\n42.16\u00b0\n.12\n\u00b7 11\n42.14\u00b0\n.10\n.\n9\n8\n.\n.\n.6\n.\n5\n42.12\u00ba\n\u00b7 14\n. .\n432\n\u00b715\n.16\n17\n19\n\u00b7\n42.10\u00b0\n18\nKilometers\n0\n5\n.\n42.08\u00b0\n87.700\u00b0\n86.675\u00b0\n86.650\u00b0\n86.625\u00b0\n86.600\u00b0\n86.575\u00b0\n86.550\u00b0\n86.525\u00b0\n86.500\u00b0\n86.475\u00b0\n86.450\u00b0\nFigure 4. Station locations at St. Joseph, Mich., during 1975.\n6\n1\n44.12\u00ba\nManitowoc, Wisconsin\n19\n17\n18\n\u00b7 16\n44.10\u00b0\n15\n2\n3\n.4\n5\nV\n44.08\u00b0\n6\n7\n.8\n9\n\u00b7 10\n\u00b7 12\n44.06\u00b0\nKilometers\n0\n1\n2\n3\n4\n5\n44.04\u00b0\n87.68\u00b0\n87.66\u00b0\n87.64\u00b0\n87.62\u00b0\n87.60\u00b0\n87.58\u00b0\n87.56\u00b0\n87.54\u00b0\n87.52\u00b0\n87.50\u00b0\n87.48\u00b0\n87.46\u00b0\nFigure 5. Station locations at Manitowoc, Wis., during 1975.\n\u00b7 13\n43.41\u00b0\nPort Washington, Wisconsin\n43.40\u00b0\n.18\n.17\n\u00b7 16\n\u00b7 15\n43.39\u00ba\n\u00b7 14\n:13\n2\n3\n43.38\u00b0\n\u00b7 5\n.6\n.7\n\u00b7 12\n8\n43.37\u00b0\n1\n\u00b7 10\n\u00b7 11\n43.36\u00b0\n\u00b7 13\nKilometers\n43.35\u00b0\n0\n1\n2\n43.34\u00b0\n87.88\u00b0\n87.86\u00b0\n87.84\u00b0\n87.82\u00b0\n87.80\u00b0\n87.78\u00b0\n87.76\u00b0\n87.74\u00b0\nFigure 6. Station locations at Port Washington, Wis., during 1975.\n42.62\u00b0\n.\nKenosha, Wisconsin\n\u00b717 .16 .15\n42.60\u00b0\n19 18\n\u00b7 14\n9\n.13\n.12\n4 .5 .6\n2 3\n42.58\u00b0\nKilometers\n\u00b7\u00b7 \u00b7 9 .10 .11\nF\n4\n7 8\n0\n1 2\n3\n4\n42.56\u00b0\n87.84\u00b0\n87.82\u00b0\n87.80\u00b0\n87.78\u00b0\n87.76\u00b0\n87.74\u00b0\n87.72\u00b0\n87.70\u00b0\n87.68\u00b0\n87.66\u00b0\n87.64\u00b0\n87.62\u00b0\n87.60\u00b0\nFigure 7. Station locations at Kenosha, Wis., during 1975.\n7\nMichigan City, Indiana\n87.00\u00b0\n6\n. 12\n5\n.9 87\n..\n.\n3 2\n10\n4\n42.00\u00b0\n\u00b710\n\u00b7 17\n.\n.14 15 16\n\u00b7 11\nZ\nKilometers\nH\n0\n5\n10\n1\n41.90\u00b0\n41.80\u00b0\n41.70\u00b0\nFigure 8. Station locations at Michigan City, Ind., during 1975.\nC\n1\n86.90\u00b0\n.13\n1\nTable 1. Station Locations in Lake Michigan During 1975 (by Latitude and Longitude)\nStation\nLatitude\nLongitude\n32\n44.083\u00baN\n87.597\u00b0W\n33\n44.085\u00b0N\n87.346\u00b0W\n34\n43. 980\u00b0N\n87.049\u00b0W\n35\n43.907\u00baN\n86.752\u00b0W\n36\n43.963\u00baN\n86.611\u00b0W\n37\n43.940\u00b0N\n86.480\u00b0W\n81\n43.917\u00baN\n87.704\u00b0W\n82\n43.749\u00b0N\n87.694\u00b0W\n83\n43.618\u00baN\n87.682\u00b0W\n84\n43.566\u00b0N\n87.764\u00b0W\n85\n43.467\u00baN\n87.730\u00b0W\n86\n43. 385\u00baN\n87.860\u00b0W\n87\n43. 358\u00b0N\n87.767\u00b0W\n88\n43. 333\u00b0N\n87.393\u00b0W\n89\n43.297\u00baN\n86.977\u00baW\n90\n43.140\u00b0N\n86.535\u00b0W\n91\n43.058\u00b0N\n86.256\u00b0W\n92\n43.038\u00baN\n86.372\u00b0W\n93\n42.900\u00b0N\n86.697\u00b0W\n94\n42.768\u00baN\n87.000\u00b0W\n95\n42.647\u00baN\n87.530\u00b0W\n96\n42.588\u00baN\n87.808\u00b0W\n97\n42. 383\u00baN\n87.417\u00b0W\n98\n42.200\u00b0N\n87.100\u00b0W\n99\n41.983\u00baN\n87.000\u00b0W\n100\n41.725\u00b0N\n86.909\u00b0W\n101\n42.116\u00baN\n86.494\u00b0W\n102\n42.325\u00b0N\n86.322\u00b0W\n103\n42.401\u00baN\n86.288\u00b0W\n104\n42.575\u00baN\n86.347\u00baW\n105\n42.677\u00baN\n86.216\u00b0W\n106\n42.773\u00baN\n86.217\u00b0W\n107\n43.225\u00b0N\n36.348\u00b0W\n108\n43.377\u00baN\n86.429\u00b0W\n109\n43.450\u00b0N\n86.617\u00b0W\n110\n43.652\u00baN\n86.547\u00baW\n111\n43.782\u00b0N\n86.444\u00b0W\n11\nTable 2. Station Locations at Little Sable Point, Mich., During 1975 (by Latitude and Longitude)\nStation\nLatitude\nLongitude\n1\n43.652\u00baN\n86.547\u00baW\n2\n43.667\u00baN\n86.547\u00b0W\n3\n43.667\u00baN\n86.552\u00b0W\n4\n43.667\u00baN\n86.557\u00b0W\n5\n43.667\u00baN\n86.567\u00b0W\n6\n43.667\u00baN\n86.578\u00b0W\n7\n43.652\u00baN\n86.613\u00b0W\n8\n43.652\u00b0N\n86.582\u00b0W\n9\n43.637\u00b0N\n86.578\u00b0W\n10\n43.637\u00b0N\n86.567\u00b0W\n11\n43.637\u00b0N\n86.557\u00b0W\n12\n43.637\u00b0N\n86.552\u00b0W\n13\n43.637\u00b0N\n86.547\u00baW\nTable 3. Station Locations at Grand Haven, Mich., During 1975 (by Latitude and Longitude)\nStation\nLatitude\nLongitude\n1\n43.067\u00baN\n86.235\u00b0W\n2\n43.058\u00baN\n86.256\u00b0W\n3\n43.057\u00baN\n86.261\u00b0W\n4\n43.056\u00b0N\n86.265\u00b0W\n5\n43.054\u00b0N\n86.275\u00b0W\n6\n43.072\u00baN\n86.256\u00b0W\n7\n43.072\u00baN\n86.260\u00b0W\n8\n43.071\u00baN\n86.265\u00b0W\n9\n43.069\u00baN\n86.275\u00b0W\n10\n43.067\u00baN\n86.288\u00b0W\n11\n43.062\u00baN\n86.318\u00b0W\n12\n43.038\u00b0N\n86.372\u00b0W\n13\n43.034\u00baN\n86. 310\u00b0W\n14\n43.039\u00b0N\n86.280\u00b0W\n15\n43.042\u00baN\n86.266\u00b0W\n16\n43.043\u00baN\n86.256\u00b0W\n17\n43.044\u00baN\n86.252\u00b0W\n18\n43.044\u00baN\n86.247\u00baW\n12\nTable 4. Station Locations at St. Joseph, Mich., During 1975 (by Latitude and Longitude)\nStation\nLatitude\nLongitude\n1\n42.113\u00baN\n86.474\u00b0W\n2\n42.116\u00b0N\n86.494\u00b0W\n3\n42.118\u00baN\n86.499\u00b0W\n4\n42.119\u00b0N\n86.503\u00b0W\n5\n42.123\u00baN\n86.512\u00b0W\n6\n42.127\u00baN\n86.481\u00b0W\n7\n42.129\u00baN\n86.485\u00b0W\n8\n42.130\u00b0N\n86.490\u00b0W\n9\n42.134\u00baN\n86.498\u00b0W\n10\n42.137\u00baN\n86.507\u00b0W\n11\n42.144\u00baN\n86.524\u00b0W\n12\n42.146\u00baN\n86.572\u00b0W\n13\n42.188\u00baN\n86.677\u00b0W\n14\n42.118\u00b0N\n86.542\u00b0W\n15\n42.112\u00baN\n86.525\u00b0W\n16\n42.108\u00baN\n86.516\u00b0W\n17\n42.105\u00baN\n86.508\u00b0W\n18\n42.103\u00baN\n86.504\u00b0W\n19\n42.101\u00b0N\n86.499\u00b0W\n13\nTable 5. Station Locations at Manitowoc, Wis., During 1975 (by Latitude and Longitude)\nStation\nLatitude\nLongitude\n1\n44.092\u00baN\n87.657\u00b0W\n2\n44.092\u00baN\n87.644\u00b0W\n3\n44.091\u00baN\n87.639\u00b0W\n4\n44.089\u00baN\n87.629\u00b0W\n5\n44.083\u00baN\n87.597\u00baW\n6\n44.078\u00b0N\n87.649\u00b0W\n7\n44.077\u00b0N\n87.644\u00b0W\n8\n44.076\u00b0N\n87.639\u00b0W\n9\n44.074\u00baN\n87.629\u00b0W\n10\n44.072\u00baN\n87.615\u00b0W\n11\n44.066\u00b0N\n87.586\u00b0W\n12\n44.072\u00baN\n87.544\u00b0W\n13\n44.057\u00baN\n87.479\u00b0W\n14\n44.094\u00baN\n87.575\u00b0W\n15\n44.099\u00baN\n87.604\u00b0W\n16\n44.102\u00b0N\n87.619\u00b0W\n17\n44.104\u00baN\n87.629\u00b0W\n18\n44.105\u00b0N\n87.634\u00b0W\n19\n44.106\u00b0N\n87.638\u00b0W\n14\nTable 6. Station Locations at Port Washington, Wis., During 1975 (by Latitude and Longitude)\nStation\nLatitude\nLongitude\n1\n43.386\u00b0N\n87.868\u00b0W\n2\n43.385\u00baN\n87.860\u00b0W\n3\n43.384\u00baN\n87.855\u00b0W\n4\n43.382\u00baN\n87.851\u00b0W\n5\n43.380\u00b0N\n87.842\u00b0W\n6\n43.377\u00baN\n87.832\u00b0W\n7\n43.371\u00b0N\n87.868\u00b0W\n8\n43.370\u00b0N\n87.863\u00b0W\n9\n43.369\u00baN\n87.858\u00b0W\n10\n43. 366\u00b0N\n87.849\u00b0W\n11\n43.363\u00b0N\n87.840\u00b0W\n12\n43.371\u00baN\n87.814\u00b0W\n13\n43.358\u00baN\n87.767\u00b0W\n14\n43.390\u00b0N\n87.825\u00b0W\n15\n43. 393\u00baN\n87.834\u00b0W\n16\n43.396\u00b0N\n87.843\u00b0W\n17\n43.397\u00baN\n87.848\u00b0W\n18\n43.398\u00baN\n87.853\u00b0W\n15\nTable 7. Station Locations at Kenosha, Wis., During 1975 (by Latitude and Longitude)\nStation\nLatitude\nLongitude\n1\n42. 588\u00baN\n87.818\u00b0W\n2\n42.588\u00baN\n87.808\u00b0W\n3\n42. 589\u00baN\n87.803\u00b0W\n4\n42. 589\u00baN\n87.798\u00b0W\n5\n42.590\u00b0N\n87.788\u00b0W\n6\n42.590\u00b0N\n87.779\u00b0W\n7\n42.574\u00baN\n87.806\u00b0W\n8\n42.574\u00baN\n87.802\u00b0W\n9\n42.575\u00baN\n87.797\u00b0W\n10\n42.575\u00baN\n87.787\u00b0W\n11\n42.576\u00b0N\n87.777\u00b0W\n12\n42.591\u00baN\n87.759\u00b0W\n13\n42.594\u00baN\n87.710\u00b0W\n14\n42.600\u00b0N\n87.622\u00b0W\n15\n42.604\u00baN\n87.780\u00b0W\n16\n42.604\u00baN\n87.790\u00b0W\n17\n42.603\u00baN\n87.800\u00b0W\n18\n42.603\u00baN\n87.805\u00b0W\n19\n42.603\u00baN\n87.810\u00b0W\n16\nTable 8. Station Locations at Michigan City, Ind., During 1975 (by Latitude and Longitude)\nStation\nLatitude\nLongitude\n1\n41.725\u00b0N\n86.909\u00b0W\n2\n41.728\u00baN\n86.912\u00b0W\n3\n41.731\u00b0N\n86.914\u00b0W\n4\n41.738\u00baN\n86.919\u00b0W\n5\n41.735\u00baN\n86.895\u00b0W\n6\n41.738\u00b0N\n86.897\u00b0W\n7\n41.742\u00baN\n86.899\u00b0W\n8\n41.748\u00baN\n86.904\u00b0W\n9\n41.761\u00baN\n86.913\u00b0W\n10\n41.780\u00b0N\n86.949\u00b0W\n11\n41.832\u00baN\n86.985\u00b0W\n12\n41.983\u00b0N\n87.000\u00b0W\n13\n41.744\u00baN\n86.945\u00b0W\n14\n41.731\u00baN\n86.936\u00b0W\n15\n41.724\u00b0N\n86.931\u00b0W\n16\n41.721\u00b0N\n86.929\u00b0W\n17\n41.718\u00baN\n86.927\u00b0W\n17\nTable 9. Cruise Schedule\nCruise number\nLake Michigan Start\nEnd\nLittle Sable\nManitowoc\nPt. Wash- ington\nGrand Haven\nKenosha\nMichigan City\nSt. Joseph\n1\n28 May\n1 July\n28 May\n31 May\n4 June\n14 June\n21 June\n25 June\n27 June\n2\n2 July\n30 July\n29 May\n28 July\n3\n31 July\n6 Sept.\n2 July\n10 July\n3 July\n11 July\n14 July\n18 July\n23 July\n26 July\n29 July\n4\n6 Sept.\n14 Oct.\n24 Nov.\n31 July\n12 Aug .\n15 July\n19 Aug .\n25 Aug .\n28 Aug .\n2 Sept.\n5\n15 Oct.\n1 Aug .\n13 Aug.\n15 Aug.\n20 Aug .\n26 Aug .\n29 Aug .\n3 Sept.\n6\n6 Sept.\n17 Sept.\n16 Aug.\n27 Sept.\n3 Oct.\n7 Oct.\n9 Oct.\n7\n9 Sept.\n19 Sept.\n22 Sept.\n29 Sept.\n4 Oct.\n8 Oct.\n10 Oct.\n8\n21 Oct.\n29 Oct.\n23 Sept.\n7 Nov.\n12 Nov.\n17 Nov.\n18 Nov .\n9\n8 Nov.\n14 Nov.\n22 Oct.\n30 Oct.\n3 Nov.\n10\n4 Nov.\n11\n1 June\n18 June\n16 June\n23 June\n26 June\n28 June\n19 June\n17 July\n22 July\n25 July\n19 Nov.\n18\nTable 10. Shipboard and Laboratory Measurements in Connection with Limnological Studies\nShipboard Measurements\nMeteorological data (printout each 6 min)\nWind speed (m/sec) (10 m above water) Wind direction (10 m above water) Barometric pressure (millibars) (3 m above water) Air temperature (C) (3 and 10 m above water) Water temperature (1.5 m below water surface) Solar radiation (incident) (gram-calories per sq. cm) (10 m above water) Solar radiation (reflected and incident) (3 m above water) Relative humidity (3 m above water) Dew point\nOn station\nWater\nWater temperature ( \u2103) Reversing thermometers at sample depth Electronic bathythermograph Air-water interface temperatures Transparency (relative to 100% in air) Secchi disc (m) PH Eh (volts) Total and phenolphthalein alkalinity (mg/1 CaCO2) Specific conductance (micromhos at 25\u2103)\nDissolved oxygen (mg/1 and pct. sat.) Coliform bacteria (membrane filter proc.)\nWaves Height (m) Period (sec) Direction (nearest 10\u00b0)\nBottom sediment Description (physical) PH Eh\nChemistry Laboratory\nDissolved ions\n1 Nitrate 1\n(Brucine method, A.P.H.A. - , 1965) 3 Phosphate (Ammonium molybdate method, U. S.G.S. 1965) Sulfate (Turbidimetric method, A. P.H.A.\" 3\n4 1965) Silica (Molybdate blue method, U.S.G.S. , 1960)\nMagnesium (Atomic absorption tech. , P. E. ,, 1971)\nCalcium 4 (Atomic absorption tech., P. E. ,, 1971)\nSodium (Atomic absorption tech., P.E. , 1971)\n4\nPotassium (Atomic absorption tech., P.E. , 1971) Chloride (AgNO2 titration)\nSuspended sediment (mg/1)\n1 Beckman DU-2 Spectrophotometer.\n2 American Public Health Association. 3 U.S. Geological Survey. 4 Perkin-Elmer Atomic Absorption Spectrophotometer. 5 The Perkin-Elmer Corporation.\n19\nWater temperatures were recorded at the sampling depths to the nearest hundredth degree Celsius by protected reversing thermometers (+0.02\u00b0 accuracy) attached to each Niskin bottle. The temperature of the water circulating through the sea chest, approximately 1.5 m below the surface, was recorded to the nearest tenth degree Celsius and printed with the meteorological data at 6-min intervals. Temperature profiles were recorded at each station with a Guildline Electronic Bathythermo- graph, Model 1800. The bathythermograph profiles were corrected by adding or subtracting the average difference between the reversing thermometer and bathythermograph temperatures.\nTransparency measurements were made with a G.M. Mfg. and Instrument Corp. Deep-Water Turbidity Meter, Model 17-M-11, modified by the U.S. Lake Survey. Transparency was determined by relating light transmission along a 1-m path through the water to the transmission along the same path through air, expressed as a percent. Color filters were not used.\nSuspended materials were determined in the field by filtering 1 to 2 liters of water through Whatman 40 and 0.45 micron Millipore filters at standard depths at the mouths of selected rivers and harbors. Approximately 475 ml of all water samples were passed through Whatman-40 filters after analyzing for nitrate and phosphate and the weight of suspended materials was reported with the limnological data.\nMeteorological observations were recorded automatically at 0.1-hr intervals by a digital system employing solid state data gathering modules. Wind and wave observations were made while on station. The wave direction was not reported at all stations and in such cases the wind direction was used. Wave height observations are estimations. The period is based on an average time of 10 successive waves.\n2.2 Chemical Analyses\nThe methods used in the water analysis are those described in Standard Methods (American Public Health Association, 1965), Rainwater and Thatcher (1960), Fishman and Skougstad (1965), and the Perkin-Elmer Corporation (1971).\nWater samples were analyzed immediately in the Shenehon laboratory for dissolved oxygen, specific conductance, phenolphthalein and total alkalinity, pH, Eh (oxidation-reduction potential), the pH and Eh of the interstitial water of the bottom sediment, and total coliforms.\nDissolved oxygen values were determined with a Beckman Dissolved Oxygen Analyzer, Model 777. After two separate tests were made on each sample, the highest partial pressure and the lowest sample temperature readings were used for calculating the dissolved oxygen. In situ temperature was recorded by the reversing thermometer at the sampling depth.\n20\nSpecific conductance was measured with an Industrial Instruments Conductivity Bridge, Model RC-19. Two separate tests were made on each sample and the average expressed in micromhos at 25\u2103.\nPhenolphthalein and total alkalinity values were determined by titrating 100-ml water samples with standard acid (H SO, ) to the end- points of pH 8.2 and 4.5, respectively. The end-points were determined with the pH meter and the results expressed in mg/1 of calcium carbonate.\nMeasurements of pH and Eh were made with a Beckman Digital pH Meter, a glass pH electrode, a calomel fiber junction reference electrode, and a platinum Eh electrode. As a means of avoiding contamination, the electrodes were rinsed in a sample of the lake water to be tested. Between tests, the electrodes were immersed in distilled water. Tests of the interstitial water of the bottom sediment were made by inserting the electrodes into the soft sample.\nWater samples to be analyzed later were preserved with chloroform and stored in 500-ml plastic bottles in a dark area below deck. These samples were transferred at the end of each cruise or survey period to the GLERL laboratory in Ann Arbor.\nChloride concentrations were determined by the argentometric method and titration of a 100-ml sample of lake water. The silver nitrate was standardized and the reagent blank value determined at the beginning of each day of testing. A Beckman DU-2 Spectrophotometer with flame attachment was used for analysis of nitrate, phosphate, sulfate, and silica, and a Perkin-Elmer Atomic Absorption Spectrophotometer was used for calcium, magnesium, sodium and potassium. Standard curves were constructed for each test and cruise. Tests for nitrate and phosphate were made on unfiltered samples upon arrival at the laboratory. Sample anion concentrations were determined by computer application of the absorbancy values to a standard curve that was adjusted by paired test standards run after each set of 10 to 20 samples in order to compensate for any change or drift in the spectrophotometer response. The cation concentrations were also adjusted by paired test standards and read directly from a recorder strip chart.\nThe bottom sediment samples were described, analyzed for pH and Eh of the intersititial water, and then treated with concentrated sulphuric acid. No further tests were made.\n3. PRECISION LIMITS\nThe degrees of precision shown in Table 11 were determined for nitrate, phosphate, sulfate, and silica by a computer comparison of pairs of test standards to the standard curve that was used to determine the sample concentrations. A pair of test standards was run after each set of 10 samples for nitrate and after each set of 20 samples for phosphate, sulfate, and silica. Calcium, magnesium, sodium, and potas- sium analyses were run in sets of 10 samples followed by one standard and at least one additional standard bracketing the concentration range after each 20 samples. For both chloride and alkalinity the estimated\n21\nTable 11. Measurement Precision\nVariable\nUnits\nEstimated precision\nAverage deviation*\nNitrate-N **\nmg/1\n\u00b10.004\nPhosphate-P **\nmg/1\n+0.0003\nSulfate\nmg/1\n\u00b10.14\nSilica\nmg/1\n\u00b10.01\nCalcium\nmg/1\n\u00b10.5\nMagnesium\nmg/1\n\u00b10.1\nSodium\nmg/1\n\u00b10.5\nPotassium\nmg/1\n\u00b10.1\nChloride\nmg/1\n\u00b10.25\nSpecific\nconductance\nmicromhos at 25\u2103\n\u00b11.0\nTotal alkalinity\nmg/1 CaCO3\n\u00b10.5\nDissolved oxygen\nmg/1\n\u00b10.1\nDissolved oxygen\nPercent sat.\n\u00b11.0\n*Average of the deviations of the test standards from the standard curve.\n** Analysis of unfiltered samples which were CHCI, poisoned and stored for variable lengths of time.\n22\nprecision is based on the change in concentration produced by one drop (0.05 ml) of titrant and on the assumption that the end-point was within t one drop. Two readings were made on each sample for specific conduc- tance, and deviations from the mean of each pair were used to compute the average deviation. Of the 105 sample pairs randomly selected, 99 percent were within 1 micromho of the mean. The estimated precision of the dissolved oxygen determinations is based on the assumption that the partial pressure is accurate to 1 mm of mercury. The average difference in the two partial pressure readings for each sample was less than 1 mm of mercury.\nTests for nitrate and phosphate were made on unfiltered samples. From the end of a cruise at a given harbor to the date of analysis, there was an interval of from 1 to 14 days for phosphate and from 2 to 15 days for nitrate. Some of the lake water samples were not analyzed until the end of a given cruise, with delays ranging up to 30 days in some cases. The Grand Haven samples were processed within an average of 3 days following collection.\n4. DATA PRESENTATION\nThe limnological data are summarized by cruise for each sampling depth at a given station (Appendix A). Nitrogen concentrations were calculated from nitrate by multiplying by a factor of 0.226. Phosphorus concentrations were calculated from phosphate by multiplying by a factor of 0.326.\nThe wind direction and wave data are summarized by cruise and station (Appendix B).\nIn the statistical summary, lake wide means, standard deviations, and sample sizes are presented by depth and cruise period for selected variables in Lake Michigan (Appendix C). The harbors are not included.\n5. ACKNOWLEDGMENTS\nThe task scientist responsibilities were shared by R. L. Chambers, who formulated and directed the sediment phase of the program. Ship services were provided by the Lake Survey Facilities Division of National Ocean Survey, NOAA. Shenehon operations were under the direction of Lt. (jg.) F. Arbusto.\nI wish to thank the GLERL Computer Systems Group for computer operations, programming assistance, and keypunching; Party Chief P. H. Hendershot and staff for field operations and sample collection; J. M. Malczyk, A. L. Langston, and staff for laboratory analyses; J. L. Grumblatt for meteorological data reduction; W. R. Lee and D. Landay of the GLERL Chemistry-Biology Group for assistance in data reduction; and A. Robertson and B. J. Eadie for review and suggestions. Final programming was by V. Maxey, J. Boyd, and J. Manor of GLERL.\n23\n6. REFERENCES\nAmerican Public Health Association (1965) : Standard Methods for the Examination of Water and Wastewater, 12th ed. American Public Health Association, Washington, D.C.\nBell, G. L., and R. L. Chambers (1976) : Aspects of the chemical- physical variability of the nearshore and open-lake environments in southern Lake Michigan. Abstract, Nineteenth Conference on Great Lakes Research, University of Guelph, Guelph, Ontario, 5 May 1976.\nFishman, M. J., and M. W. Skougstad (1965) : Rapid field and laboratory determination of phosphate in natural water, U.S. Geological Survey Professional Paper 525-B, pp. B167-B169, U. S. Government Printing Office, Washington, D.C. 20402.\nGreat Lakes Environmental Research Laboratory (1975) : Technical plan for the Great Lakes Environmental Research Laboratory. National Oceanic and Atmospheric Administration, Ann Arbor, Mich.\nThe Perkin-Elmer Corporation (1970) . Analytical Methods for Atomic Absorption Spectrophotometry. The Perkin-Elmer Corporation, Hartford, Conn.\nPinsak, A. P. (Ed.) (1975): Proceedings of Workshop on Priority Great Lakes Environmental Research Initiatives. National Oceanic and Atmospheric Administration, Ann Arbor, Mich.\nRainwater, F. H., and L. L. Thatcher (1960) : Methods for collection and analysis of water samples, U.S. Geological Survey Water-Supply Paper 1454, U.S. Government Printing Office, Washington, D.C. 20402.\n*U.S. GOVERNMENT PRINTING OFFICE: 1980-677-403/259\n24\nGLERL LIBRARY - Ann Arbor 5 0778 01005771 9\nQC 802 .U6 G5 no. 13 c.1 Bell, Gerald L. Southern Lake Michigan chemical and physical\nISSUED TO\nDATE\nQC 802 .U6 G5 no.13 c.1 Bell, Gerald L. 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3.1913, 9.3108, 3.1913, 9.448, 2.7834, 9.4483 ], "confidence": 0.998, "span": { "offset": 6030, "length": 5 } }, { "content": "Great", "polygon": [ 3.2839, 9.3109, 3.6918, 9.3115, 3.6918, 9.4471, 3.2839, 9.4479 ], "confidence": 0.997, "span": { "offset": 6036, "length": 5 } }, { "content": "Lakes.", "polygon": [ 3.7821, 9.3117, 4.2648, 9.3131, 4.2648, 9.4452, 3.7822, 9.4469 ], "confidence": 0.994, "span": { "offset": 6042, "length": 6 } }, { "content": "*GLERL", "polygon": [ 1.1166, 9.728, 1.6289, 9.7288, 1.6252, 9.8581, 1.1136, 9.8478 ], "confidence": 0.993, "span": { "offset": 6049, "length": 6 } }, { "content": "Contribution", "polygon": [ 1.7158, 9.729, 2.7057, 9.7309, 2.7006, 9.8687, 1.712, 9.8596 ], "confidence": 0.994, "span": { "offset": 6056, "length": 12 } }, { "content": "No.", "polygon": [ 2.7795, 9.7311, 3.0118, 9.7317, 3.0063, 9.8687, 2.7743, 9.8689 ], "confidence": 0.989, "span": { "offset": 6069, "length": 3 } }, { "content": "178.", "polygon": [ 3.1268, 9.732, 3.4415, 9.7328, 3.4377, 9.8669, 3.1212, 9.8685 ], "confidence": 0.989, "span": { "offset": 6073, "length": 4 } } ], "lines": [ { "content": "SOUTHERN LAKE MICHIGAN CHEMICAL AND PHYSICAL CHARACTERISTICS DATA FOR 1975*", "polygon": [ 1.1009, 1.1104, 7.3473, 1.0961, 7.3473, 1.2205, 1.1009, 1.2301 ], "spans": [ { "offset": 3414, "length": 75 } ] }, { "content": "Gerald L. Bell", "polygon": [ 3.5899, 1.4407, 4.753, 1.4407, 4.753, 1.5556, 3.5899, 1.5556 ], "spans": [ { "offset": 3490, "length": 14 } ] }, { "content": "Water samples at standard depths, bottom sediment, and", "polygon": [ 1.9194, 1.9337, 6.4331, 1.9289, 6.4331, 2.0629, 1.9194, 2.0773 ], "spans": [ { "offset": 3505, "length": 54 } ] }, { "content": "meteorological data were collected at established stations in", "polygon": [ 1.4982, 2.106, 6.5958, 2.0964, 6.5958, 2.2257, 1.4982, 2.2448 ], "spans": [ { "offset": 3560, "length": 61 } ] }, { "content": "Southern Lake Michigan, in six harbors, and at one nearshore", "polygon": [ 1.5173, 2.2687, 6.5192, 2.2687, 6.5192, 2.4028, 1.5173, 2.4123 ], "spans": [ { "offset": 3622, "length": 60 } ] }, { "content": "site during the 1975 open-water season. There were 5 lake", "polygon": [ 1.5173, 2.4363, 6.3469, 2.4315, 6.3469, 2.5607, 1.5173, 2.5846 ], "spans": [ { "offset": 3683, "length": 57 } ] }, { "content": "cruises and 9 to 11 one-day cruises at each harbor. The samp-", "polygon": [ 1.5173, 2.6038, 6.682, 2.6038, 6.682, 2.7378, 1.5173, 2.7426 ], "spans": [ { "offset": 3741, "length": 61 } ] }, { "content": "ling programs and analytical methods are described. Chemical", "polygon": [ 1.5173, 2.7809, 6.591, 2.7665, 6.591, 2.9005, 1.5173, 2.9245 ], "spans": [ { "offset": 3803, "length": 60 } ] }, { "content": "characteristics of the water and of the bottom sediment sampled", "polygon": [ 1.5173, 2.9388, 6.7681, 2.934, 6.7681, 3.0728, 1.5173, 3.0824 ], "spans": [ { "offset": 3864, "length": 63 } ] }, { "content": "during one cruise are listed by cruise for each station and", "polygon": [ 1.5125, 3.1063, 6.4235, 3.1016, 6.4235, 3.2356, 1.5125, 3.2499 ], "spans": [ { "offset": 3928, "length": 59 } ] }, { "content": "sampling depth. Wind, wave, and sediment data are listed by", "polygon": [ 1.5173, 3.2787, 6.5097, 3.2691, 6.5097, 3.4127, 1.5173, 3.4222 ], "spans": [ { "offset": 3988, "length": 59 } ] }, { "content": "cruise for each station. The statistical summaries showing", "polygon": [ 1.5173, 3.4414, 6.4283, 3.4414, 6.4283, 3.5802, 1.5173, 3.5802 ], "spans": [ { "offset": 4048, "length": 58 } ] }, { "content": "lake-wide means, standard deviations, and sample sizes of se-", "polygon": [ 1.5173, 3.6041, 6.5958, 3.6041, 6.5958, 3.7429, 1.5173, 3.7477 ], "spans": [ { "offset": 4107, "length": 61 } ] }, { "content": "lected variables are presented by depth for each lake cruise", "polygon": [ 1.5125, 3.7764, 6.524, 3.7669, 6.524, 3.9105, 1.5125, 3.92 ], "spans": [ { "offset": 4169, "length": 60 } ] }, { "content": "period. These means do not include the harbor data.", "polygon": [ 1.5125, 3.9487, 5.83, 3.9392, 5.83, 4.0732, 1.5125, 4.0876 ], "spans": [ { "offset": 4230, "length": 51 } ] }, { "content": "1.", "polygon": [ 3.5947, 4.4465, 3.7478, 4.4417, 3.7478, 4.5518, 3.5899, 4.5518 ], "spans": [ { "offset": 4282, "length": 2 } ] }, { "content": "INTRODUCTION", "polygon": [ 3.9202, 4.4465, 4.9349, 4.4465, 4.9349, 4.5662, 3.9202, 4.5614 ], "spans": [ { "offset": 4285, "length": 12 } ] }, { "content": "This basic data report presents data collected aboard the Research", "polygon": [ 1.5317, 4.7768, 7.0218, 4.7672, 7.0218, 4.906, 1.5317, 4.9204 ], "spans": [ { "offset": 4298, "length": 66 } ] }, { "content": "Vessel Shenehon between 28 May and 24 November 1975 in Southern Lake", "polygon": [ 1.1009, 4.9395, 6.7681, 4.9347, 6.7681, 5.0735, 1.1009, 5.0831 ], "spans": [ { "offset": 4365, "length": 68 } ] }, { "content": "Michigan and at seven harbor and nearshore areas by the Chemistry-", "polygon": [ 1.1009, 5.1166, 6.6102, 5.1166, 6.6102, 5.2506, 1.1009, 5.2554 ], "spans": [ { "offset": 4434, "length": 66 } ] }, { "content": "Biology Group of the U. S. Department of Commerce, NOAA, Great Lakes", "polygon": [ 1.1105, 5.2841, 6.6868, 5.2794, 6.6916, 5.4134, 1.1105, 5.4229 ], "spans": [ { "offset": 4501, "length": 68 } ] }, { "content": "Environmental Research Laboratory (GLERL) .", "polygon": [ 1.1057, 5.4421, 4.5855, 5.4421, 4.5807, 5.5905, 1.1057, 5.5857 ], "spans": [ { "offset": 4570, "length": 43 } ] }, { "content": "The GLERL Priority Initiatives Workshop in 1974 resulted in a", "polygon": [ 1.5269, 5.7819, 6.5958, 5.7676, 6.5958, 5.9112, 1.5269, 5.9207 ], "spans": [ { "offset": 4614, "length": 61 } ] }, { "content": "general agreement that the nearshore zone should be the area of principal", "polygon": [ 1.1009, 5.9494, 7.175, 5.9351, 7.175, 6.0835, 1.1009, 6.0978 ], "spans": [ { "offset": 4676, "length": 73 } ] }, { "content": "focus (Pinsak, 1975) .", "polygon": [ 1.0913, 6.1074, 2.8671, 6.1026, 2.8671, 6.2606, 1.0913, 6.2701 ], "spans": [ { "offset": 4750, "length": 22 } ] }, { "content": "In line with this objective, an investigation was", "polygon": [ 3.0011, 6.0978, 7.0888, 6.0978, 7.0888, 6.2558, 3.0011, 6.2558 ], "spans": [ { "offset": 4773, "length": 49 } ] }, { "content": "conducted by GLERL during 1975 under Task 6.6 to describe the broad", "polygon": [ 1.1009, 6.2845, 6.6916, 6.2701, 6.6916, 6.4042, 1.1009, 6.4281 ], "spans": [ { "offset": 4823, "length": 67 } ] }, { "content": "aspects of the spatial and temporal variability of selected variables in", "polygon": [ 1.1057, 6.452, 7.0984, 6.4377, 7.0984, 6.5765, 1.1057, 6.5956 ], "spans": [ { "offset": 4891, "length": 72 } ] }, { "content": "the nearshore environment at sites chosen to reflect a wide range of", "polygon": [ 1.12, 6.6195, 6.7634, 6.61, 6.7634, 6.744, 1.12, 6.7631 ], "spans": [ { "offset": 4964, "length": 68 } ] }, { "content": "conditions, to compare the nearshore and open lake environment, and to", "polygon": [ 1.1057, 6.7871, 6.9261, 6.7775, 6.9261, 6.9163, 1.1057, 6.9307 ], "spans": [ { "offset": 5033, "length": 70 } ] }, { "content": "establish gradients through the nearshore environment (GLERL, 1975) .", "polygon": [ 1.1105, 6.9546, 6.7634, 6.9354, 6.7634, 7.079, 1.1105, 7.103 ], "spans": [ { "offset": 5104, "length": 69 } ] }, { "content": "Southern Lake Michigan is subject to a wide range of stresses", "polygon": [ 1.5173, 7.2801, 6.6054, 7.2801, 6.6054, 7.4236, 1.5173, 7.4284 ], "spans": [ { "offset": 5174, "length": 61 } ] }, { "content": "imposed by municipal, industrial, and agricultural input as well as", "polygon": [ 1.1105, 7.4572, 6.6868, 7.4476, 6.6916, 7.5912, 1.1105, 7.6103 ], "spans": [ { "offset": 5236, "length": 67 } ] }, { "content": "natural input from streams. An understanding of the variations within", "polygon": [ 1.1057, 7.6295, 6.9452, 7.6151, 6.9452, 7.7491, 1.1057, 7.7731 ], "spans": [ { "offset": 5304, "length": 69 } ] }, { "content": "the nearshore area is essential to the development and use of this", "polygon": [ 1.12, 7.7922, 6.6054, 7.7826, 6.6054, 7.9214, 1.12, 7.9358 ], "spans": [ { "offset": 5374, "length": 66 } ] }, { "content": "resource. Although a number of significant studies have been conducted", "polygon": [ 1.1057, 7.9693, 7.0266, 7.9549, 7.0266, 8.0937, 1.1057, 8.1081 ], "spans": [ { "offset": 5441, "length": 70 } ] }, { "content": "in Lake Michigan, the majority of these have been limited to the open", "polygon": [ 1.1105, 8.132, 6.8591, 8.1225, 6.8591, 8.2613, 1.1105, 8.2756 ], "spans": [ { "offset": 5512, "length": 69 } ] }, { "content": "lake or to a specific area or problem, and have not been designed to", "polygon": [ 1.1153, 8.2996, 6.7681, 8.29, 6.7681, 8.4336, 1.1153, 8.4479 ], "spans": [ { "offset": 5582, "length": 68 } ] }, { "content": "study the variability of different segments of the nearshore area and to", "polygon": [ 1.1153, 8.4671, 7.108, 8.4575, 7.108, 8.5963, 1.1153, 8.6107 ], "spans": [ { "offset": 5651, "length": 72 } ] }, { "content": "compare the areas with each other and the open lake. 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Neither meteoro-", "polygon": [ 1.0841, 1.27, 6.6336, 1.2509, 6.6336, 1.3893, 1.0841, 1.4084 ], "spans": [ { "offset": 6146, "length": 66 } ] }, { "content": "logical conditions, nor profiles of water temperature and transparency", "polygon": [ 1.0841, 1.4371, 6.8819, 1.4275, 6.8819, 1.566, 1.0841, 1.5755 ], "spans": [ { "offset": 6213, "length": 70 } ] }, { "content": "recorded at each station are included in this report. One report on", "polygon": [ 1.0746, 1.5994, 6.7243, 1.5946, 6.7243, 1.7283, 1.0746, 1.7378 ], "spans": [ { "offset": 6284, "length": 67 } ] }, { "content": "these data is available (Bell and Chambers, 1976) .", "polygon": [ 1.0937, 1.7617, 5.2056, 1.7569, 5.2056, 1.9002, 1.0937, 1.9049 ], "spans": [ { "offset": 6352, "length": 51 } ] }, { "content": "2.", "polygon": [ 3.8302, 2.2582, 3.9782, 2.2582, 3.9687, 2.3681, 3.8254, 2.3681 ], "spans": [ { "offset": 6404, "length": 2 } ] }, { "content": "METHODS", "polygon": [ 4.1406, 2.263, 4.7328, 2.263, 4.7328, 2.3728, 4.1406, 2.3728 ], "spans": [ { "offset": 6407, "length": 7 } ] }, { "content": "2.1 Sampling Program", "polygon": [ 3.4051, 2.5877, 5.0767, 2.5972, 5.0767, 2.7405, 3.4051, 2.7309 ], "spans": [ { "offset": 6415, "length": 20 } ] }, { "content": "Water characteristics, bottom sediment, and meteorological data", "polygon": [ 1.4948, 2.9266, 6.7243, 2.9219, 6.7243, 3.0651, 1.4948, 3.0699 ], "spans": [ { "offset": 6436, "length": 63 } ] }, { "content": "were collected at seven harbor and nearshore areas and along lake traver-", "polygon": [ 1.0841, 3.1033, 7.1542, 3.0985, 7.1542, 3.2322, 1.0841, 3.2418 ], "spans": [ { "offset": 6500, "length": 73 } ] }, { "content": "ses (Figures 1-8, Tables 1-8) .", "polygon": [ 1.0937, 3.2704, 3.5627, 3.2656, 3.5627, 3.4089, 1.0937, 3.4136 ], "spans": [ { "offset": 6574, "length": 31 } ] }, { "content": "Surveys of 2 days each were conducted at Manitowoc, Port Washington,", "polygon": [ 1.5092, 3.6046, 7.1255, 3.5951, 7.1255, 3.7335, 1.5092, 3.7478 ], "spans": [ { "offset": 6606, "length": 68 } ] }, { "content": "and Kenosha, Wis .; Michigan City, Ind .; and St. Joseph, Grand Haven, and", "polygon": [ 1.0984, 3.7717, 7.0682, 3.7574, 7.0682, 3.9006, 1.0984, 3.9149 ], "spans": [ { "offset": 6675, "length": 74 } ] }, { "content": "Little Sable Point, Mich. 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Station Locations at Little Sable Point, Mich., During 1975", "polygon": [ 1.3199, 1.1664, 7.0344, 1.1664, 7.0344, 1.3337, 1.3199, 1.3385 ], "spans": [ { "offset": 12526, "length": 68 } ] }, { "content": "(by Latitude and Longitude)", "polygon": [ 3.0844, 1.3433, 5.289, 1.3385, 5.289, 1.501, 3.0844, 1.5058 ], "spans": [ { "offset": 12595, "length": 27 } ] }, { "content": "Station", "polygon": [ 2.3241, 2.0316, 2.9171, 2.0364, 2.9171, 2.1512, 2.3241, 2.1464 ], "spans": [ { "offset": 12623, "length": 7 } ] }, { "content": "Latitude", "polygon": [ 3.5579, 2.0269, 4.2274, 2.0269, 4.2274, 2.1512, 3.5579, 2.1512 ], "spans": [ { "offset": 12631, "length": 8 } ] }, { "content": "Longitude", "polygon": [ 5.6237, 2.0269, 6.3793, 2.0221, 6.3793, 2.1655, 5.6237, 2.1655 ], "spans": [ { "offset": 12640, "length": 9 } ] }, { "content": "1", "polygon": [ 2.4197, 2.5384, 2.4867, 2.5384, 2.4867, 2.6483, 2.4149, 2.6435 ], "spans": [ { "offset": 12650, "length": 1 } ] }, { "content": "43.652\u00baN", 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"polygon": [ 5.6285, 3.1646, 6.3171, 3.1646, 6.3171, 3.3271, 5.6285, 3.3223 ], "spans": [ { "offset": 12741, "length": 8 } ] }, { "content": "6", "polygon": [ 2.4197, 3.3701, 2.4962, 3.3701, 2.4962, 3.4801, 2.4197, 3.4801 ], "spans": [ { "offset": 12750, "length": 1 } ] }, { "content": "43.667\u00baN", "polygon": [ 3.5579, 3.3558, 4.2417, 3.3558, 4.2465, 3.4801, 3.5579, 3.4849 ], "spans": [ { "offset": 12752, "length": 8 } ] }, { "content": "86.578\u00b0W", "polygon": [ 5.6333, 3.351, 6.3076, 3.351, 6.3076, 3.4801, 5.6333, 3.4801 ], "spans": [ { "offset": 12761, "length": 8 } ] }, { "content": "7", "polygon": [ 2.4197, 3.5422, 2.4962, 3.5422, 2.4915, 3.657, 2.4197, 3.657 ], "spans": [ { "offset": 12770, "length": 1 } ] }, { "content": "43.652\u00baN", "polygon": [ 3.5722, 3.5279, 4.2417, 3.5279, 4.2417, 3.657, 3.5722, 3.657 ], "spans": [ { "offset": 12772, "length": 8 } ] }, { "content": "86.613\u00b0W", "polygon": [ 5.6381, 3.504, 6.3076, 3.504, 6.3076, 3.6665, 5.6381, 3.6665 ], "spans": [ { "offset": 12781, "length": 8 } ] }, { "content": "8", "polygon": [ 2.4197, 3.7095, 2.4915, 3.7095, 2.4867, 3.8195, 2.4149, 3.8147 ], "spans": [ { "offset": 12790, "length": 1 } ] }, { "content": "43.652\u00b0N", "polygon": [ 3.5674, 3.6952, 4.2513, 3.6952, 4.2513, 3.8195, 3.5674, 3.8195 ], "spans": [ { "offset": 12792, "length": 8 } ] }, { "content": "86.582\u00b0W", "polygon": [ 5.6285, 3.6761, 6.3123, 3.6713, 6.3123, 3.829, 5.6285, 3.8338 ], "spans": [ { "offset": 12801, "length": 8 } ] }, { "content": "9", "polygon": [ 2.4197, 3.8673, 2.4962, 3.8721, 2.4962, 3.9725, 2.4197, 3.9677 ], "spans": [ { "offset": 12810, "length": 1 } ] }, { "content": "43.637\u00b0N", "polygon": [ 3.5674, 3.8577, 4.2417, 3.8529, 4.2417, 3.982, 3.5674, 3.9868 ], "spans": [ { "offset": 12812, "length": 8 } ] }, { "content": "86.578\u00b0W", "polygon": [ 5.6429, 3.8482, 6.3171, 3.8482, 6.3171, 3.982, 5.6429, 3.982 ], "spans": [ { "offset": 12821, "length": 8 } ] }, { "content": "10", "polygon": [ 2.3384, 4.0442, 2.5058, 4.0442, 2.5058, 4.1541, 2.3384, 4.1589 ], "spans": [ { "offset": 12830, "length": 2 } ] }, { "content": "43.637\u00b0N", "polygon": [ 3.5674, 4.0298, 4.2417, 4.025, 4.2417, 4.1541, 3.5674, 4.1541 ], "spans": [ { "offset": 12833, "length": 8 } ] }, { "content": "86.567\u00b0W", "polygon": [ 5.6429, 4.0203, 6.3123, 4.0203, 6.3123, 4.1493, 5.6429, 4.1493 ], "spans": [ { "offset": 12842, "length": 8 } ] }, { "content": "11", "polygon": [ 2.3289, 4.1876, 2.5106, 4.1971, 2.5106, 4.3405, 2.3241, 4.3453 ], "spans": [ { "offset": 12851, "length": 2 } ] }, { "content": "43.637\u00b0N", "polygon": [ 3.5722, 4.1971, 4.2513, 4.1971, 4.2513, 4.3262, 3.5722, 4.331 ], "spans": [ { "offset": 12854, "length": 8 } ] }, { "content": "86.557\u00b0W", "polygon": [ 5.6476, 4.1924, 6.3219, 4.1924, 6.3219, 4.3166, 5.6476, 4.3166 ], "spans": [ { "offset": 12863, "length": 8 } ] }, { "content": "12", "polygon": [ 2.3384, 4.374, 2.501, 4.3788, 2.501, 4.4935, 2.3384, 4.4983 ], "spans": [ { "offset": 12872, "length": 2 } ] }, { "content": "43.637\u00b0N", "polygon": [ 3.577, 4.3644, 4.256, 4.3644, 4.256, 4.4887, 3.577, 4.4935 ], "spans": [ { "offset": 12875, "length": 8 } ] }, { "content": "86.552\u00b0W", "polygon": [ 5.6429, 4.3597, 6.3219, 4.3597, 6.3219, 4.484, 5.6429, 4.484 ], "spans": [ { "offset": 12884, "length": 8 } ] }, { "content": "13", "polygon": [ 2.3384, 4.5413, 2.5058, 4.5461, 2.5058, 4.6608, 2.3384, 4.6608 ], "spans": [ { "offset": 12893, "length": 2 } ] }, { "content": "43.637\u00b0N", "polygon": [ 3.577, 4.5318, 4.2513, 4.5318, 4.2513, 4.656, 3.577, 4.656 ], "spans": [ { "offset": 12896, "length": 8 } ] }, { "content": "86.547\u00baW", "polygon": [ 5.6476, 4.5222, 6.3171, 4.5222, 6.3171, 4.6465, 5.6476, 4.6513 ], "spans": [ { "offset": 12905, "length": 8 } ] }, { "content": "Table 3. Station Locations at Grand Haven, Mich., During 1975", "polygon": [ 1.5829, 5.354, 6.7188, 5.3492, 6.7188, 5.5165, 1.5829, 5.5213 ], "spans": [ { "offset": 12914, "length": 61 } ] }, { "content": "(by Latitude and Longitude)", "polygon": [ 3.1036, 5.5213, 5.3129, 5.5213, 5.3129, 5.6886, 3.1036, 5.6934 ], "spans": [ { "offset": 12976, "length": 27 } ] }, { "content": "Station", "polygon": [ 2.3576, 6.2192, 2.941, 6.224, 2.941, 6.3339, 2.3576, 6.3339 ], "spans": [ { "offset": 13004, "length": 7 } ] }, { "content": "Latitude", "polygon": [ 3.5866, 6.2192, 4.2608, 6.2192, 4.2608, 6.3339, 3.5866, 6.3339 ], "spans": [ { "offset": 13012, "length": 8 } ] }, { "content": "Longitude", "polygon": [ 5.6476, 6.2049, 6.408, 6.2001, 6.4128, 6.3483, 5.6476, 6.3531 ], "spans": [ { "offset": 13021, "length": 9 } ] }, { "content": "1", "polygon": [ 2.4532, 6.7211, 2.5154, 6.7259, 2.5154, 6.8359, 2.4484, 6.8359 ], "spans": [ { "offset": 13031, "length": 1 } ] }, { "content": "43.067\u00baN", "polygon": [ 3.6009, 6.7116, 4.2704, 6.7116, 4.2704, 6.8359, 3.6009, 6.8407 ], "spans": [ { "offset": 13033, "length": 8 } ] }, { "content": "86.235\u00b0W", "polygon": [ 5.6668, 6.7068, 6.3363, 6.702, 6.3363, 6.8311, 5.6668, 6.8359 ], "spans": [ { "offset": 13042, "length": 8 } ] }, { "content": "2", "polygon": [ 2.4484, 6.8885, 2.5249, 6.8932, 2.5202, 6.9984, 2.4436, 6.9984 ], "spans": [ { "offset": 13051, "length": 1 } ] }, { "content": "43.058\u00baN", "polygon": [ 3.6009, 6.8741, 4.2704, 6.8741, 4.2704, 7.0032, 3.6009, 7.008 ], "spans": [ { "offset": 13053, "length": 8 } ] }, { "content": "86.256\u00b0W", "polygon": [ 5.6668, 6.8693, 6.3458, 6.8693, 6.3458, 6.9984, 5.6668, 7.0032 ], "spans": [ { "offset": 13062, "length": 8 } ] }, { "content": "3", "polygon": [ 2.4484, 7.0606, 2.5249, 7.0653, 2.5249, 7.1705, 2.4436, 7.1705 ], "spans": [ { "offset": 13071, "length": 1 } ] }, { "content": "43.057\u00baN", "polygon": [ 3.6009, 7.0414, 4.2704, 7.0414, 4.2704, 7.1705, 3.6009, 7.1753 ], "spans": [ { "offset": 13073, "length": 8 } ] }, { "content": "86.261\u00b0W", "polygon": [ 5.6715, 7.0319, 6.3458, 7.0271, 6.3458, 7.1657, 5.6715, 7.1705 ], "spans": [ { "offset": 13082, "length": 8 } ] }, { "content": "4", "polygon": [ 2.4436, 7.2231, 2.5249, 7.2231, 2.5202, 7.3378, 2.4389, 7.333 ], "spans": [ { "offset": 13091, "length": 1 } ] }, { "content": "43.056\u00b0N", "polygon": [ 3.6009, 7.2135, 4.2752, 7.2135, 4.2752, 7.3378, 3.6009, 7.3426 ], "spans": [ { "offset": 13093, "length": 8 } ] }, { "content": "86.265\u00b0W", "polygon": [ 5.6715, 7.204, 6.3458, 7.1992, 6.3458, 7.333, 5.6715, 7.333 ], "spans": [ { "offset": 13102, "length": 8 } ] }, { "content": "5", "polygon": [ 2.4532, 7.3904, 2.5297, 7.3952, 2.5249, 7.5051, 2.4484, 7.5051 ], "spans": [ { "offset": 13111, "length": 1 } ] }, { "content": "43.054\u00b0N", "polygon": [ 3.6009, 7.3808, 4.28, 7.3713, 4.28, 7.5051, 3.6009, 7.5099 ], "spans": [ { "offset": 13113, "length": 8 } ] }, { "content": "86.275\u00b0W", "polygon": [ 5.6715, 7.3474, 6.3458, 7.3474, 6.341, 7.5099, 5.6715, 7.5099 ], "spans": [ { "offset": 13122, "length": 8 } ] }, { "content": "6", "polygon": [ 2.4484, 7.5529, 2.5249, 7.5577, 2.5249, 7.6677, 2.4484, 7.6677 ], "spans": [ { "offset": 13131, "length": 1 } ] }, { "content": "43.072\u00baN", "polygon": [ 3.5913, 7.5242, 4.2656, 7.529, 4.2656, 7.6868, 3.5913, 7.6868 ], "spans": [ { "offset": 13133, "length": 8 } ] }, { "content": "86.256\u00b0W", "polygon": [ 5.6715, 7.5338, 6.3458, 7.529, 6.3458, 7.6629, 5.6715, 7.6677 ], "spans": [ { "offset": 13142, "length": 8 } ] }, { "content": "7", "polygon": [ 2.4484, 7.725, 2.5297, 7.725, 2.5249, 7.8397, 2.4389, 7.835 ], "spans": [ { "offset": 13151, "length": 1 } ] }, { "content": "43.072\u00baN", "polygon": [ 3.6009, 7.7155, 4.2752, 7.7155, 4.2752, 7.835, 3.6009, 7.8445 ], "spans": [ { "offset": 13153, "length": 8 } ] }, { "content": "86.260\u00b0W", "polygon": [ 5.662, 7.682, 6.3602, 7.682, 6.3602, 7.8397, 5.662, 7.8397 ], "spans": [ { "offset": 13162, "length": 8 } ] }, { "content": "8", "polygon": [ 2.4532, 7.8923, 2.5345, 7.8971, 2.5297, 8.0023, 2.4484, 8.0023 ], "spans": [ { "offset": 13171, "length": 1 } ] }, { "content": "43.071\u00baN", "polygon": [ 3.6057, 7.8828, 4.28, 7.8828, 4.28, 8.0118, 3.6057, 8.0118 ], "spans": [ { "offset": 13173, "length": 8 } ] }, { "content": "86.265\u00b0W", "polygon": [ 5.6763, 7.878, 6.3458, 7.878, 6.3458, 8.0023, 5.6763, 8.0023 ], "spans": [ { "offset": 13182, "length": 8 } ] }, { "content": "9", "polygon": [ 2.4484, 8.0596, 2.5345, 8.0644, 2.5249, 8.1744, 2.4484, 8.1744 ], "spans": [ { "offset": 13191, "length": 1 } ] }, { "content": "43.069\u00baN", "polygon": [ 3.6057, 8.0501, 4.2752, 8.0501, 4.2752, 8.1744, 3.6057, 8.1744 ], "spans": [ { "offset": 13193, "length": 8 } ] }, { "content": "86.275\u00b0W", "polygon": [ 5.662, 8.0214, 6.3458, 8.0262, 6.3458, 8.1887, 5.662, 8.1839 ], "spans": [ { "offset": 13202, "length": 8 } ] }, { "content": "10", "polygon": [ 2.3719, 8.227, 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"depth.", "polygon": [ 1.1954, 9.3476, 1.6812, 9.349, 1.6812, 9.4826, 1.1954, 9.4843 ], "confidence": 0.996, "span": { "offset": 21089, "length": 6 } }, { "content": "20", "polygon": [ 4.1982, 9.9019, 4.3715, 9.9019, 4.3732, 10.0188, 4.1982, 10.0212 ], "confidence": 0.974, "span": { "offset": 21096, "length": 2 } } ], "lines": [ { "content": "Water temperatures were recorded at the sampling depths to the", "polygon": [ 1.5665, 1.1458, 6.7151, 1.1363, 6.7151, 1.2795, 1.5665, 1.2843 ], "spans": [ { "offset": 18401, "length": 62 } ] }, { "content": "nearest hundredth degree Celsius by protected reversing thermometers", "polygon": [ 1.151, 1.3034, 6.7915, 1.3034, 6.7915, 1.4466, 1.151, 1.4466 ], "spans": [ { "offset": 18464, "length": 68 } ] }, { "content": "(+0.02\u00b0 accuracy) attached to each Niskin bottle. The temperature of", "polygon": [ 1.1845, 1.4753, 6.868, 1.4753, 6.868, 1.6137, 1.1845, 1.6185 ], "spans": [ { "offset": 18533, "length": 68 } ] }, { "content": "the water circulating through the sea chest, approximately 1.5 m below", "polygon": [ 1.1558, 1.6424, 6.9683, 1.6424, 6.9683, 1.7856, 1.1558, 1.7856 ], "spans": [ { "offset": 18602, "length": 70 } ] }, { "content": "the surface, was recorded to the nearest tenth degree Celsius and printed", "polygon": [ 1.1654, 1.8095, 7.2118, 1.8095, 7.2118, 1.9479, 1.1654, 1.9479 ], "spans": [ { "offset": 18673, "length": 73 } ] }, { "content": "with the meteorological data at 6-min intervals. Temperature profiles", "polygon": [ 1.1606, 1.9766, 6.9587, 1.9766, 6.9587, 2.115, 1.1606, 2.115 ], "spans": [ { "offset": 18747, "length": 69 } ] }, { "content": "were recorded at each station with a Guildline Electronic Bathythermo-", "polygon": [ 1.1558, 2.1437, 6.9683, 2.1437, 6.9683, 2.2773, 1.1558, 2.2821 ], "spans": [ { "offset": 18817, "length": 70 } ] }, { "content": "graph, Model 1800. The bathythermograph profiles were corrected by", "polygon": [ 1.1701, 2.3108, 6.7056, 2.3108, 6.7056, 2.454, 1.1701, 2.454 ], "spans": [ { "offset": 18888, "length": 66 } ] }, { "content": "adding or subtracting the average difference between the reversing", "polygon": [ 1.1606, 2.4826, 6.6339, 2.4826, 6.6339, 2.6211, 1.1606, 2.6259 ], "spans": [ { "offset": 18955, "length": 66 } ] }, { "content": "thermometer and bathythermograph temperatures.", "polygon": [ 1.1749, 2.645, 4.9623, 2.6497, 4.9575, 2.7977, 1.1749, 2.7834 ], "spans": [ { "offset": 19022, "length": 46 } ] }, { "content": "Transparency measurements were made with a G.M. Mfg. and Instrument", "polygon": [ 1.5809, 2.9887, 7.1306, 2.9839, 7.1306, 3.1128, 1.5809, 3.1224 ], "spans": [ { "offset": 19069, "length": 67 } ] }, { "content": "Corp. Deep-Water Turbidity Meter, Model 17-M-11, modified by the U.S.", "polygon": [ 1.1701, 3.151, 6.8584, 3.1463, 6.8584, 3.2847, 1.1701, 3.2943 ], "spans": [ { "offset": 19137, "length": 69 } ] }, { "content": "Lake Survey. Transparency was determined by relating light transmission", "polygon": [ 1.1701, 3.3229, 7.1354, 3.3134, 7.1354, 3.4566, 1.1701, 3.4661 ], "spans": [ { "offset": 19207, "length": 71 } ] }, { "content": "along a 1-m path through the water to the transmission along the same", "polygon": [ 1.1606, 3.49, 6.8823, 3.4852, 6.8871, 3.6189, 1.1606, 3.6285 ], "spans": [ { "offset": 19279, "length": 69 } ] }, { "content": "path through air, expressed as a percent. Color filters were not used.", "polygon": [ 1.1701, 3.6523, 7.0447, 3.6523, 7.0447, 3.786, 1.1701, 3.7956 ], "spans": [ { "offset": 19349, "length": 70 } ] }, { "content": "Suspended materials were determined in the field by filtering 1 to", "polygon": [ 1.5856, 3.9818, 7.0495, 3.977, 7.0495, 4.1202, 1.5856, 4.125 ], "spans": [ { "offset": 19420, "length": 66 } ] }, { "content": "2 liters of water through Whatman 40 and 0.45 micron Millipore filters", "polygon": [ 1.1701, 4.1489, 6.973, 4.1489, 6.973, 4.2873, 1.1701, 4.2873 ], "spans": [ { "offset": 19487, "length": 70 } ] }, { "content": "at standard depths at the mouths of selected rivers and harbors.", "polygon": [ 1.1749, 4.3207, 6.4524, 4.316, 6.4524, 4.4544, 1.1749, 4.4592 ], "spans": [ { "offset": 19558, "length": 64 } ] }, { "content": "Approximately 475 ml of all water samples were passed through Whatman-40", "polygon": [ 1.1701, 4.4878, 7.1354, 4.4878, 7.1354, 4.6263, 1.1701, 4.6263 ], "spans": [ { "offset": 19623, "length": 72 } ] }, { "content": "filters after analyzing for nitrate and phosphate and the weight of", "polygon": [ 1.1892, 4.6549, 6.7199, 4.6549, 6.7199, 4.7982, 1.1892, 4.7982 ], "spans": [ { "offset": 19696, "length": 67 } ] }, { "content": "suspended materials was reported with the limnological data.", "polygon": [ 1.1845, 4.822, 6.1277, 4.822, 6.1277, 4.9653, 1.1845, 4.9701 ], "spans": [ { "offset": 19764, "length": 60 } ] }, { "content": "Meteorological observations were recorded automatically at 0.1-hr", "polygon": [ 1.5761, 5.1563, 6.973, 5.1515, 6.973, 5.2899, 1.5761, 5.2947 ], "spans": [ { "offset": 19825, "length": 65 } ] }, { "content": "intervals by a digital system employing solid state data gathering", "polygon": [ 1.1892, 5.3234, 6.653, 5.3234, 6.653, 5.4618, 1.1892, 5.4666 ], "spans": [ { "offset": 19891, "length": 66 } ] }, { "content": "modules. Wind and wave observations were made while on station. The", "polygon": [ 1.1797, 5.4809, 6.8823, 5.4714, 6.8823, 5.6194, 1.1797, 5.6289 ], "spans": [ { "offset": 19958, "length": 67 } ] }, { "content": "wave direction was not reported at all stations and in such cases the", "polygon": [ 1.1749, 5.6576, 6.8966, 5.6528, 6.8966, 5.7817, 1.1749, 5.796 ], "spans": [ { "offset": 20026, "length": 69 } ] }, { "content": "wind direction was used. Wave height observations are estimations. The", "polygon": [ 1.1701, 5.8199, 7.1498, 5.8151, 7.1498, 5.9488, 1.1701, 5.9583 ], "spans": [ { "offset": 20096, "length": 70 } ] }, { "content": "period is based on an average time of 10 successive waves.", "polygon": [ 1.1701, 5.9918, 5.9653, 5.987, 5.9653, 6.1207, 1.1701, 6.1302 ], "spans": [ { "offset": 20167, "length": 58 } ] }, { "content": "2.2 Chemical Analyses", "polygon": [ 3.5056, 6.4835, 5.2537, 6.4931, 5.2537, 6.6267, 3.5056, 6.6124 ], "spans": [ { "offset": 20226, "length": 21 } ] }, { "content": "The methods used in the water analysis are those described in", "polygon": [ 1.6048, 6.8225, 6.6578, 6.8177, 6.6578, 6.9514, 1.6048, 6.9609 ], "spans": [ { "offset": 20248, "length": 61 } ] }, { "content": "Standard Methods (American Public Health Association, 1965), Rainwater", "polygon": [ 1.194, 6.9896, 6.9778, 6.9848, 6.9778, 7.1233, 1.194, 7.128 ], "spans": [ { "offset": 20310, "length": 70 } ] }, { "content": "and Thatcher (1960), Fishman and Skougstad (1965), and the Perkin-Elmer", "polygon": [ 1.1845, 7.1567, 7.0638, 7.1519, 7.0638, 7.2951, 1.1845, 7.3047 ], "spans": [ { "offset": 20381, "length": 71 } ] }, { "content": "Corporation (1971).", "polygon": [ 1.194, 7.3333, 2.7415, 7.3286, 2.7462, 7.4718, 1.194, 7.4766 ], "spans": [ { "offset": 20453, "length": 19 } ] }, { "content": "Water samples were analyzed immediately in the Shenehon laboratory", "polygon": [ 1.6, 7.6628, 7.0686, 7.6532, 7.0686, 7.7917, 1.6, 7.8108 ], "spans": [ { "offset": 20473, "length": 66 } ] }, { "content": "for dissolved oxygen, specific conductance, phenolphthalein and total", "polygon": [ 1.1988, 7.8346, 6.9014, 7.8203, 6.9014, 7.9683, 1.1988, 7.9826 ], "spans": [ { "offset": 20540, "length": 69 } ] }, { "content": "alkalinity, pH, Eh (oxidation-reduction potential), the pH and Eh of the", "polygon": [ 1.194, 8.0065, 7.1641, 7.9922, 7.1641, 8.1354, 1.194, 8.1497 ], "spans": [ { "offset": 20610, "length": 72 } ] }, { "content": "interstitial water of the bottom sediment, and total coliforms.", "polygon": [ 1.194, 8.1688, 6.3904, 8.1641, 6.3904, 8.2977, 1.194, 8.3025 ], "spans": [ { "offset": 20683, "length": 63 } ] }, { "content": "Dissolved oxygen values were determined with a Beckman Dissolved", "polygon": [ 1.6095, 8.503, 6.9157, 8.4887, 6.9157, 8.6272, 1.6095, 8.6415 ], "spans": [ { "offset": 20747, "length": 64 } ] }, { "content": "Oxygen Analyzer, Model 777. After two separate tests were made on each", "polygon": [ 1.194, 8.6701, 7.0829, 8.6654, 7.0829, 8.8038, 1.194, 8.8134 ], "spans": [ { "offset": 20812, "length": 70 } ] }, { "content": "sample, the highest partial pressure and the lowest sample temperature", "polygon": [ 1.2036, 8.8516, 6.9969, 8.842, 6.9969, 8.9805, 1.2036, 8.9948 ], "spans": [ { "offset": 20883, "length": 70 } ] }, { "content": "readings were used for calculating the dissolved oxygen.", "polygon": [ 1.1988, 9.0091, 5.8459, 9.0043, 5.8459, 9.1476, 1.1988, 9.1523 ], "spans": [ { "offset": 20954, "length": 56 } ] }, { "content": "In situ", "polygon": [ 5.9653, 8.9805, 6.5862, 8.9805, 6.5862, 9.1428, 5.9653, 9.1476 ], "spans": [ { "offset": 21011, "length": 7 } ] }, { "content": "temperature was recorded by the reversing thermometer at the sampling", "polygon": [ 1.1988, 9.1858, 6.9205, 9.1714, 6.9205, 9.3099, 1.1988, 9.3242 ], "spans": [ { "offset": 21019, "length": 69 } ] }, { "content": "depth.", "polygon": [ 1.194, 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9.929, 3.8069, 9.9265 ], "confidence": 0.995, "span": { "offset": 24057, "length": 8 } }, { "content": "and", "polygon": [ 4.5515, 9.784, 4.7918, 9.7845, 4.7918, 9.9305, 4.5515, 9.9294 ], "confidence": 0.999, "span": { "offset": 24066, "length": 3 } }, { "content": "alkalinity", "polygon": [ 4.8822, 9.7847, 5.7101, 9.7865, 5.7101, 9.9348, 4.8822, 9.9308 ], "confidence": 0.992, "span": { "offset": 24070, "length": 10 } }, { "content": "the", "polygon": [ 5.81, 9.7868, 6.0455, 9.7873, 6.0455, 9.9365, 5.81, 9.9353 ], "confidence": 0.999, "span": { "offset": 24081, "length": 3 } }, { "content": "estimated", "polygon": [ 6.1359, 9.7875, 6.8857, 9.7895, 6.8857, 9.9394, 6.1359, 9.937 ], "confidence": 0.995, "span": { "offset": 24085, "length": 9 } }, { "content": "21", "polygon": [ 4.0394, 10.0448, 4.2072, 10.0448, 4.2072, 10.1647, 4.0394, 10.1647 ], "confidence": 0.998, "span": { "offset": 24095, "length": 2 } } ], "lines": [ { "content": "Specific conductance was measured with an Industrial Instruments", "polygon": [ 1.5046, 1.0543, 6.833, 1.0783, 6.8282, 1.2173, 1.5046, 1.1933 ], "spans": [ { "offset": 21099, "length": 64 } ] }, { "content": "Conductivity Bridge, Model RC-19. Two separate tests were made on each", "polygon": [ 1.0925, 1.2316, 7.0007, 1.2508, 7.0007, 1.3946, 1.0925, 1.3754 ], "spans": [ { "offset": 21164, "length": 70 } ] }, { "content": "sample and the average expressed in micromhos at 25\u2103.", "polygon": [ 1.0877, 1.3994, 5.5584, 1.409, 5.5584, 1.5527, 1.0877, 1.5479 ], "spans": [ { "offset": 21235, "length": 53 } ] }, { "content": "Phenolphthalein and total alkalinity values were determined by", "polygon": [ 1.4759, 1.7301, 6.6605, 1.7492, 6.6605, 1.8978, 1.4759, 1.8738 ], "spans": [ { "offset": 21289, "length": 62 } ] }, { "content": "titrating 100-ml water samples with standard acid (H SO, ) to the end-", "polygon": [ 1.0925, 1.8978, 6.8282, 1.917, 6.8282, 2.0703, 1.0877, 2.0464 ], "spans": [ { "offset": 21352, "length": 70 } ] }, { "content": "points of pH 8.2 and 4.5, respectively. The end-points were determined", "polygon": [ 1.0734, 2.0703, 7.0055, 2.0847, 7.0055, 2.2333, 1.0734, 2.2141 ], "spans": [ { "offset": 21423, "length": 70 } ] }, { "content": "with the pH meter and the results expressed in mg/1 of calcium carbonate.", "polygon": [ 1.0686, 2.2333, 7.1397, 2.2572, 7.1349, 2.3962, 1.0686, 2.3722 ], "spans": [ { "offset": 21494, "length": 73 } ] }, { "content": "Measurements of pH and Eh were made with a Beckman Digital pH", "polygon": [ 1.4806, 2.5687, 6.5743, 2.5975, 6.5743, 2.7365, 1.4806, 2.7077 ], "spans": [ { "offset": 21568, "length": 61 } ] }, { "content": "Meter, a glass pH electrode, a calomel fiber junction reference electrode,", "polygon": [ 1.0638, 2.7365, 7.2164, 2.7604, 7.2164, 2.9042, 1.0638, 2.885 ], "spans": [ { "offset": 21630, "length": 74 } ] }, { "content": "and a platinum Eh electrode. As a means of avoiding contamination, the", "polygon": [ 1.0686, 2.8994, 6.9959, 2.9282, 6.9959, 3.0671, 1.0686, 3.0432 ], "spans": [ { "offset": 21705, "length": 70 } ] }, { "content": "electrodes were rinsed in a sample of the lake water to be tested.", "polygon": [ 1.0734, 3.0671, 6.5455, 3.0911, 6.5455, 3.2301, 1.0734, 3.2109 ], "spans": [ { "offset": 21776, "length": 66 } ] }, { "content": "Between tests, the electrodes were immersed in distilled water. Tests", "polygon": [ 1.0638, 3.2397, 6.9049, 3.2492, 6.9049, 3.3882, 1.0638, 3.3738 ], "spans": [ { "offset": 21843, "length": 69 } ] }, { "content": "of the interstitial water of the bottom sediment were made by inserting", "polygon": [ 1.0686, 3.4026, 6.9912, 3.4266, 6.9864, 3.5703, 1.0686, 3.5416 ], "spans": [ { "offset": 21913, "length": 71 } ] }, { "content": "the electrodes into the soft sample.", "polygon": [ 1.0829, 3.5703, 4.0538, 3.5799, 4.0538, 3.7237, 1.0829, 3.7045 ], "spans": [ { "offset": 21985, "length": 36 } ] }, { "content": "Water samples to be analyzed later were preserved with chloroform", "polygon": [ 1.4711, 3.901, 6.9097, 3.9154, 6.9097, 4.0639, 1.4711, 4.0448 ], "spans": [ { "offset": 22022, "length": 65 } ] }, { "content": "and stored in 500-ml plastic bottles in a dark area below deck. These", "polygon": [ 1.0686, 4.0687, 6.9001, 4.0735, 6.9001, 4.2365, 1.0686, 4.2173 ], "spans": [ { "offset": 22088, "length": 69 } ] }, { "content": "samples were transferred at the end of each cruise or survey period to", "polygon": [ 1.0686, 4.2461, 6.9001, 4.2604, 6.9001, 4.409, 1.0686, 4.385 ], "spans": [ { "offset": 22158, "length": 70 } ] }, { "content": "the GLERL laboratory in Ann Arbor.", "polygon": [ 1.0686, 4.409, 3.8909, 4.4186, 3.8909, 4.5576, 1.0686, 4.5432 ], "spans": [ { "offset": 22229, "length": 34 } ] }, { "content": "Chloride concentrations were determined by the argentometric", "polygon": [ 1.4902, 4.7445, 6.4832, 4.7588, 6.4832, 4.9026, 1.4902, 4.8787 ], "spans": [ { "offset": 22264, "length": 60 } ] }, { "content": "method and titration of a 100-ml sample of lake water. The silver", "polygon": [ 1.0494, 4.9122, 6.6366, 4.9266, 6.6366, 5.0656, 1.0494, 5.0464 ], "spans": [ { "offset": 22325, "length": 65 } ] }, { "content": "nitrate was standardized and the reagent blank value determined at the", "polygon": [ 1.059, 5.0847, 6.8905, 5.0895, 6.8905, 5.2333, 1.059, 5.2237 ], "spans": [ { "offset": 22391, "length": 70 } ] }, { "content": "beginning of each day of testing. A Beckman DU-2 Spectrophotometer with", "polygon": [ 1.0494, 5.2477, 7.063, 5.2668, 7.0582, 5.4106, 1.0494, 5.3914 ], "spans": [ { "offset": 22462, "length": 71 } ] }, { "content": "flame attachment was used for analysis of nitrate, phosphate, sulfate,", "polygon": [ 1.0638, 5.4154, 6.8714, 5.4394, 6.8714, 5.5783, 1.0638, 5.5496 ], "spans": [ { "offset": 22534, "length": 70 } ] }, { "content": "and silica, and a Perkin-Elmer Atomic Absorption Spectrophotometer was", "polygon": [ 1.059, 5.5783, 6.8953, 5.6023, 6.8953, 5.7461, 1.059, 5.7173 ], "spans": [ { "offset": 22605, "length": 70 } ] }, { "content": "used for calcium, magnesium, sodium and potassium. Standard curves were", "polygon": [ 1.059, 5.7509, 7.063, 5.77, 7.063, 5.909, 1.059, 5.8898 ], "spans": [ { "offset": 22676, "length": 71 } ] }, { "content": "constructed for each test and cruise. Tests for nitrate and phosphate", "polygon": [ 1.0542, 5.9234, 6.9001, 5.9378, 6.8953, 6.0815, 1.0542, 6.0576 ], "spans": [ { "offset": 22748, "length": 69 } ] }, { "content": "were made on unfiltered samples upon arrival at the laboratory. Sample", "polygon": [ 1.0494, 6.0815, 6.972, 6.1103, 6.972, 6.2541, 1.0494, 6.2253 ], "spans": [ { "offset": 22818, "length": 70 } ] }, { "content": "anion concentrations were determined by computer application of the", "polygon": [ 1.0542, 6.2541, 6.6414, 6.2684, 6.6414, 6.4122, 1.0542, 6.393 ], "spans": [ { "offset": 22889, "length": 67 } ] }, { "content": "absorbancy values to a standard curve that was adjusted by paired test", "polygon": [ 1.0542, 6.417, 6.8857, 6.441, 6.8857, 6.5847, 1.0542, 6.5608 ], "spans": [ { "offset": 22957, "length": 70 } ] }, { "content": "standards run after each set of 10 to 20 samples in order to compensate", "polygon": [ 1.0638, 6.5895, 6.9672, 6.6087, 6.9672, 6.7525, 1.0638, 6.7237 ], "spans": [ { "offset": 23028, "length": 71 } ] }, { "content": "for any change or drift in the spectrophotometer response. The cation", "polygon": [ 1.0638, 6.7477, 6.8953, 6.7669, 6.8953, 6.9106, 1.0638, 6.8962 ], "spans": [ { "offset": 23100, "length": 69 } ] }, { "content": "concentrations were also adjusted by paired test standards and read", "polygon": [ 1.0686, 6.925, 6.6318, 6.9346, 6.6318, 7.0832, 1.0686, 7.064 ], "spans": [ { "offset": 23170, "length": 67 } ] }, { "content": "directly from a recorder strip chart.", "polygon": [ 1.0494, 7.0879, 4.1401, 7.0975, 4.1401, 7.2413, 1.0494, 7.2269 ], "spans": [ { "offset": 23238, "length": 37 } ] }, { "content": "The bottom sediment samples were described, analyzed for pH and Eh", "polygon": [ 1.4711, 7.4234, 6.9816, 7.4378, 6.9816, 7.5911, 1.4711, 7.5672 ], "spans": [ { "offset": 23276, "length": 66 } ] }, { "content": "of the intersititial water, and then treated with concentrated sulphuric", "polygon": [ 1.0494, 7.5911, 7.0535, 7.6103, 7.0535, 7.7589, 1.0494, 7.7301 ], "spans": [ { "offset": 23343, "length": 72 } ] }, { "content": "acid.", "polygon": [ 1.0494, 7.7685, 1.4711, 7.7637, 1.4711, 7.8787, 1.0494, 7.8835 ], "spans": [ { "offset": 23416, "length": 5 } ] }, { "content": "No further tests were made.", "polygon": [ 1.5573, 7.7493, 3.8717, 7.7541, 3.8717, 7.9122, 1.5573, 7.9027 ], "spans": [ { "offset": 23422, "length": 27 } ] }, { "content": "3.", "polygon": [ 3.3782, 8.0752, 3.5555, 8.08, 3.5555, 8.2381, 3.3734, 8.2381 ], "spans": [ { "offset": 23450, "length": 2 } ] }, { "content": "PRECISION LIMITS", "polygon": [ 3.5746, 8.08, 5.0697, 8.0848, 5.0649, 8.2477, 3.5746, 8.2381 ], "spans": [ { "offset": 23453, "length": 16 } ] }, { "content": "The degrees of precision shown in Table 11 were determined for", "polygon": [ 1.4759, 8.4298, 6.6366, 8.4346, 6.6366, 8.5784, 1.4759, 8.5736 ], "spans": [ { "offset": 23470, "length": 62 } ] }, { "content": "nitrate, phosphate, sulfate, and silica by a computer comparison of", "polygon": [ 1.0446, 8.5975, 6.627, 8.6119, 6.627, 8.7557, 1.0446, 8.7461 ], "spans": [ { "offset": 23533, "length": 67 } ] }, { "content": "pairs of test standards to the standard curve that was used to determine", "polygon": [ 1.0446, 8.7653, 7.0535, 8.7797, 7.0535, 8.9234, 1.0446, 8.9138 ], "spans": [ { "offset": 23601, "length": 72 } ] }, { "content": "the sample concentrations. A pair of test standards was run after each", "polygon": [ 1.0542, 8.9378, 6.972, 8.9522, 6.972, 9.0912, 1.0542, 9.0816 ], "spans": [ { "offset": 23674, "length": 70 } ] }, { "content": "set of 10 samples for nitrate and after each set of 20 samples for", "polygon": [ 1.0542, 9.1007, 6.5503, 9.1151, 6.5503, 9.2589, 1.0542, 9.2445 ], "spans": [ { "offset": 23745, "length": 66 } ] }, { "content": "phosphate, sulfate, and silica. 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"length": 6 } }, { "content": "23", "polygon": [ 4.0781, 9.9796, 4.26, 9.9796, 4.26, 10.104, 4.0781, 10.104 ], "confidence": 0.998, "span": { "offset": 27240, "length": 2 } } ], "lines": [ { "content": "precision is based on the change in concentration produced by one drop", "polygon": [ 1.0435, 1.0434, 6.8782, 1.0721, 6.8782, 1.2253, 1.0435, 1.1774 ], "spans": [ { "offset": 24685, "length": 70 } ] }, { "content": "(0.05 ml) of titrant and on the assumption that the end-point was within", "polygon": [ 1.0626, 1.2062, 7.0505, 1.2445, 7.0505, 1.388, 1.0626, 1.3498 ], "spans": [ { "offset": 24756, "length": 72 } ] }, { "content": "t one drop. Two readings were made on each sample for specific conduc-", "polygon": [ 1.0435, 1.3833, 6.9644, 1.412, 6.9644, 1.5556, 1.0435, 1.5221 ], "spans": [ { "offset": 24829, "length": 70 } ] }, { "content": "tance, and deviations from the mean of each pair were used to compute", "polygon": [ 1.053, 1.5508, 6.7921, 1.5795, 6.7921, 1.7279, 1.053, 1.6896 ], "spans": [ { "offset": 24900, "length": 69 } ] }, { "content": "the average deviation. Of the 105 sample pairs randomly selected, 99", "polygon": [ 1.0435, 1.7135, 6.7873, 1.7422, 6.7825, 1.8906, 1.0435, 1.8571 ], "spans": [ { "offset": 24970, "length": 68 } ] }, { "content": "percent were within 1 micromho of the mean. The estimated precision of", "polygon": [ 1.0435, 1.8858, 6.95, 1.905, 6.95, 2.0581, 1.0435, 2.0246 ], "spans": [ { "offset": 25039, "length": 70 } ] }, { "content": "the dissolved oxygen determinations is based on the assumption that the", "polygon": [ 1.0482, 2.039, 6.9548, 2.0773, 6.9548, 2.2161, 1.0482, 2.1778 ], "spans": [ { "offset": 25110, "length": 71 } ] }, { "content": "partial pressure is accurate to 1 mm of mercury. The average difference", "polygon": [ 1.0339, 2.2161, 7.0362, 2.2448, 7.0362, 2.3884, 1.0339, 2.3501 ], "spans": [ { "offset": 25182, "length": 71 } ] }, { "content": "in the two partial pressure readings for each sample was less than 1 mm", "polygon": [ 1.0435, 2.3788, 6.9596, 2.4075, 6.9596, 2.5511, 1.0435, 2.5176 ], "spans": [ { "offset": 25254, "length": 71 } ] }, { "content": "of mercury.", "polygon": [ 1.0387, 2.5463, 1.9481, 2.5607, 1.9433, 2.6947, 1.0387, 2.6804 ], "spans": [ { "offset": 25326, "length": 11 } ] }, { "content": "Tests for nitrate and phosphate were made on unfiltered samples.", "polygon": [ 1.4503, 2.891, 6.7681, 2.9197, 6.7681, 3.0681, 1.4503, 3.025 ], "spans": [ { "offset": 25338, "length": 64 } ] }, { "content": "From the end of a cruise at a given harbor to the date of analysis,", "polygon": [ 1.0387, 3.0537, 6.6006, 3.0872, 6.6006, 3.2356, 1.0387, 3.1877 ], "spans": [ { "offset": 25403, "length": 67 } ] }, { "content": "there was an interval of from 1 to 14 days for phosphate and from 2 to", "polygon": [ 1.0435, 3.226, 6.8687, 3.2595, 6.8639, 3.3983, 1.0435, 3.3552 ], "spans": [ { "offset": 25471, "length": 70 } ] }, { "content": "15 days for nitrate. Some of the lake water samples were not analyzed", "polygon": [ 1.0387, 3.3792, 6.8687, 3.4222, 6.8639, 3.5658, 1.0387, 3.5228 ], "spans": [ { "offset": 25542, "length": 69 } ] }, { "content": "until the end of a given cruise, with delays ranging up to 30 days in", "polygon": [ 1.0339, 3.5419, 6.7825, 3.585, 6.7825, 3.7334, 1.0339, 3.6903 ], "spans": [ { "offset": 25612, "length": 69 } ] }, { "content": "some cases. The Grand Haven samples were processed within an average of", "polygon": [ 1.0339, 3.7238, 7.0314, 3.7525, 7.0266, 3.9009, 1.0339, 3.853 ], "spans": [ { "offset": 25682, "length": 71 } ] }, { "content": "3 days following collection.", "polygon": [ 1.0387, 3.8817, 3.3554, 3.8961, 3.3554, 4.0397, 1.0339, 4.0253 ], "spans": [ { "offset": 25754, "length": 28 } ] }, { "content": "4.", "polygon": [ 3.3649, 4.3939, 3.5325, 4.3987, 3.5277, 4.5135, 3.3601, 4.5135 ], "spans": [ { "offset": 25783, "length": 2 } ] }, { "content": "DATA PRESENTATION", "polygon": [ 3.5277, 4.3891, 5.1264, 4.4035, 5.1264, 4.5327, 3.5277, 4.5183 ], "spans": [ { "offset": 25786, "length": 17 } ] }, { "content": "The limnological data are summarized by cruise for each sampling", "polygon": [ 1.436, 4.7098, 6.7873, 4.7481, 6.7873, 4.8917, 1.436, 4.8534 ], "spans": [ { "offset": 25804, "length": 64 } ] }, { "content": "depth at a given station (Appendix A). Nitrogen concentrations were", "polygon": [ 1.0243, 4.8869, 6.6963, 4.9156, 6.6916, 5.0544, 1.0243, 5.0257 ], "spans": [ { "offset": 25869, "length": 67 } ] }, { "content": "calculated from nitrate by multiplying by a factor of 0.226. Phosphorus", "polygon": [ 1.0243, 5.0544, 7.0266, 5.0831, 7.0266, 5.2267, 1.0243, 5.1932 ], "spans": [ { "offset": 25937, "length": 71 } ] }, { "content": "concentrations were calculated from phosphate by multiplying by a factor", "polygon": [ 1.0195, 5.2267, 7.0218, 5.2459, 7.0218, 5.399, 1.0195, 5.3607 ], "spans": [ { "offset": 26009, "length": 72 } ] }, { "content": "of 0.326.", "polygon": [ 1.0243, 5.3894, 1.7519, 5.3894, 1.7519, 5.5091, 1.0243, 5.5091 ], "spans": [ { "offset": 26082, "length": 9 } ] }, { "content": "The wind direction and wave data are summarized by cruise and", "polygon": [ 1.4407, 5.7245, 6.5288, 5.7484, 6.524, 5.892, 1.4407, 5.8585 ], "spans": [ { "offset": 26092, "length": 61 } ] }, { "content": "station (Appendix B).", "polygon": [ 1.0147, 5.892, 2.7522, 5.892, 2.7522, 6.0356, 1.0147, 6.0308 ], "spans": [ { "offset": 26154, "length": 21 } ] }, { "content": "In the statistical summary, lake wide means, standard deviations,", "polygon": [ 1.436, 6.2271, 6.8399, 6.2558, 6.8352, 6.3994, 1.436, 6.3659 ], "spans": [ { "offset": 26176, "length": 65 } ] }, { "content": "and sample sizes are presented by depth and cruise period for selected", "polygon": [ 1.0147, 6.3946, 6.8591, 6.4137, 6.8543, 6.5621, 1.0147, 6.5382 ], "spans": [ { "offset": 26242, "length": 70 } ] }, { "content": "variables in Lake Michigan (Appendix C). The harbors are not included.", "polygon": [ 1.0147, 6.5573, 6.9117, 6.586, 6.9117, 6.7296, 1.0147, 6.7009 ], "spans": [ { "offset": 26313, "length": 70 } ] }, { "content": "5.", "polygon": [ 3.4176, 7.2178, 3.6043, 7.2178, 3.609, 7.371, 3.4176, 7.3758 ], "spans": [ { "offset": 26384, "length": 2 } ] }, { "content": "ACKNOWLEDGMENTS", "polygon": [ 3.6378, 7.2178, 5.0258, 7.2226, 5.0258, 7.3949, 3.6378, 7.3901 ], "spans": [ { "offset": 26387, "length": 15 } ] }, { "content": "The task scientist responsibilities were shared by R. L. Chambers,", "polygon": [ 1.4312, 7.5625, 6.9357, 7.596, 6.9357, 7.7395, 1.4312, 7.7013 ], "spans": [ { "offset": 26403, "length": 66 } ] }, { "content": "who formulated and directed the sediment phase of the program. Ship", "polygon": [ 1.0052, 7.7348, 6.6724, 7.7731, 6.6724, 7.9166, 1.0052, 7.8688 ], "spans": [ { "offset": 26470, "length": 67 } ] }, { "content": "services were provided by the Lake Survey Facilities Division of National", "polygon": [ 1.01, 7.9119, 7.0936, 7.931, 7.0936, 8.0746, 1.01, 8.0459 ], "spans": [ { "offset": 26538, "length": 73 } ] }, { "content": "Ocean Survey, NOAA. Shenehon operations were under the direction of Lt.", "polygon": [ 1.0147, 8.0746, 6.9931, 8.1033, 6.9931, 8.2421, 1.0147, 8.2134 ], "spans": [ { "offset": 26612, "length": 71 } ] }, { "content": "(jg.) F. Arbusto.", "polygon": [ 1.0195, 8.2278, 2.4172, 8.2278, 2.4172, 8.3809, 1.0195, 8.3761 ], "spans": [ { "offset": 26684, "length": 17 } ] }, { "content": "I wish to thank the GLERL Computer Systems Group for computer", "polygon": [ 1.4312, 8.5724, 6.5049, 8.6011, 6.5049, 8.7495, 1.4312, 8.7112 ], "spans": [ { "offset": 26702, "length": 61 } ] }, { "content": "operations, programming assistance, and keypunching; Party Chief P. H.", "polygon": [ 1.0004, 8.7495, 6.8256, 8.7686, 6.8208, 8.9122, 1.0004, 8.8931 ], "spans": [ { "offset": 26764, "length": 70 } ] }, { "content": "Hendershot and staff for field operations and sample collection; J. M.", "polygon": [ 0.9956, 8.9074, 6.8256, 8.9409, 6.8256, 9.0797, 0.9956, 9.0462 ], "spans": [ { "offset": 26835, "length": 70 } ] }, { "content": "Malczyk, A. L. Langston, and staff for laboratory analyses; J. L. Grumblatt", "polygon": [ 1.0004, 9.0702, 7.2564, 9.1037, 7.2564, 9.2425, 0.9956, 9.2137 ], "spans": [ { "offset": 26906, "length": 75 } ] }, { "content": "for meteorological data reduction; W. R. Lee and D. Landay of the GLERL", "polygon": [ 1.0052, 9.2425, 6.9261, 9.2664, 6.9261, 9.4052, 1.0052, 9.3813 ], "spans": [ { "offset": 26982, "length": 71 } ] }, { "content": "Chemistry-Biology Group for assistance in data reduction; and A. Robertson", "polygon": [ 1.01, 9.4052, 7.1941, 9.4339, 7.1941, 9.5775, 1.01, 9.5536 ], "spans": [ { "offset": 27054, "length": 74 } ] }, { "content": "and B. J. Eadie for review and suggestions. Final programming was by V.", "polygon": [ 1.0004, 9.5679, 6.9883, 9.6014, 6.9883, 9.7546, 1.0004, 9.7115 ], "spans": [ { "offset": 27129, "length": 71 } ] }, { "content": "Maxey, J. Boyd, and J. Manor of GLERL.", "polygon": [ 0.9908, 9.745, 4.1499, 9.745, 4.1499, 9.8982, 0.9908, 9.8934 ], "spans": [ { "offset": 27201, "length": 38 } ] }, { "content": "23", "polygon": [ 4.0829, 9.9796, 4.2552, 9.9796, 4.2504, 10.104, 4.0781, 10.104 ], "spans": [ { "offset": 27240, "length": 2 } ] } ], "spans": [ { "offset": 24685, "length": 2557 } ] }, { "pageNumber": 30, "angle": -0.17720000445842743, "width": 8.3194, "height": 11.0139, "unit": "inch", "words": [ { "content": "6.", "polygon": [ 3.7507, 1.3528, 3.9341, 1.3528, 3.9326, 1.4627, 3.7507, 1.4602 ], "confidence": 0.992, "span": { "offset": 27243, "length": 2 } }, { "content": "REFERENCES", "polygon": [ 4.0843, 1.3511, 4.9276, 1.3517, 4.9193, 1.4632, 4.0843, 1.4647 ], "confidence": 0.993, "span": { "offset": 27246, "length": 10 } }, { "content": "American", "polygon": [ 1.1785, 1.7, 1.8546, 1.6941, 1.8516, 1.8245, 1.1755, 1.8254 ], "confidence": 0.995, "span": { "offset": 27257, "length": 8 } }, { "content": "Public", "polygon": [ 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U6 G5 no.13 c.1" }, { "spans": [ { "offset": 25, "length": 125 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 1.133, 1.2982, 5.3977, 1.4486, 5.3809, 1.9244, 1.1163, 1.774 ] } ], "content": "GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, LIBRARY OAA Data Report ERL GLERL-13 2300 WASHTENAW AVENUE ANN ARBOR, ML 48104" }, { "spans": [ { "offset": 151, "length": 4 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 6.6607, 1.0762, 6.7176, 0.9741, 6.9904, 1.1262, 6.9335, 1.2284 ] } ], "content": "COMM" }, { "spans": [ { "offset": 156, "length": 5 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 6.8567, 1.1708, 6.9661, 1.1067, 7.1638, 1.4443, 7.0545, 1.5084 ] } ], "content": "MERCE" }, { "spans": [ { "offset": 162, "length": 4 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 7.0542, 1.7747, 7.1542, 1.8282, 7.0055, 2.1065, 6.9054, 2.053 ] } ], "content": "RICA" }, { "spans": [ { "offset": 167, "length": 9 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 6.0458, 2.1449, 6.7516, 2.1802, 6.742, 2.3722, 6.0362, 2.3368 ] } ], "content": "STATES OF" }, { "spans": [ { "offset": 177, "length": 44 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 1.0594, 4.0259, 4.7311, 3.9971, 4.7321, 4.1266, 1.0604, 4.1554 ] } ], "content": "SOUTHERN LAKE MICHIGAN CHEMICAL AND PHYSICAL" }, { "spans": [ { "offset": 222, "length": 29 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 1.064, 4.2754, 3.4775, 4.2514, 3.4787, 4.3762, 1.0652, 4.4001 ] } ], "content": "CHARACTERISTICS DATA FOR 1975" }, { "spans": [ { "offset": 252, "length": 14 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 1.0637, 4.7696, 2.2264, 4.7552, 2.2279, 4.88, 1.0652, 4.8944 ] } ], "content": "Gerald L. Bell" }, { "spans": [ { "offset": 267, "length": 78 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 1.068, 5.7629, 4.8309, 5.7389, 4.834, 6.2236, 1.0711, 6.2476 ] } ], "content": "Great Lakes Environmental Research Laboratory Ann Arbor, Michigan January 1980" }, { "spans": [ { "offset": 346, "length": 13 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 2.8785, 7.3369, 5.0478, 7.2984, 5.053, 7.5958, 2.8838, 7.6343 ] } ], "content": "GLERL LIBRARY" }, { "spans": [ { "offset": 360, "length": 4 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 1.0959, 9.7072, 2.1179, 9.6976, 2.1208, 10.0095, 1.0988, 10.0191 ] } ], "content": "noaa" }, { "spans": [ { "offset": 365, "length": 49 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 2.3324, 9.6651, 4.5584, 9.6797, 4.5561, 10.0335, 2.3301, 10.019 ] } ], "content": "NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION 1" }, { "spans": [ { "offset": 415, "length": 35 } ], "boundingRegions": [ { "pageNumber": 1, "polygon": [ 4.7071, 9.7168, 5.9163, 9.7168, 5.9163, 10.0047, 4.7071, 10.0047 ] } ], "content": "Environmental Research Laboratories" }, { "spans": [ { "offset": 451, "length": 97 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 5.0061, 1.677, 6.9121, 1.8164, 6.8778, 2.2855, 4.9718, 2.1461 ] } ], "content": "GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY, LIBRARY 2300 WASHTENAW AVENUE ANN ARBOR, MI. 48104" }, { "spans": [ { "offset": 549, "length": 29 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 1.9471, 2.3758, 4.3726, 2.3758, 4.3726, 2.5145, 1.9471, 2.5145 ] } ], "content": "NOAA Data Report ERL GLERL-13" }, { "spans": [ { "offset": 579, "length": 74 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 1.9658, 3.3797, 5.626, 3.3749, 5.6265, 3.7478, 1.9662, 3.7526 ] } ], "content": "SOUTHERN LAKE MICHIGAN CHEMICAL AND PHYSICAL CHARACTERISTICS DATA FOR 1975" }, { "spans": [ { "offset": 654, "length": 14 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 1.9605, 4.1254, 3.1192, 4.1159, 3.1202, 4.2354, 1.9615, 4.2449 ] } ], "content": "Gerald L. Bell" }, { "spans": [ { "offset": 669, "length": 78 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 1.9615, 5.1197, 5.7217, 5.1197, 5.7217, 5.6073, 1.9615, 5.6073 ] } ], "content": "Great Lakes Environmental Research Laboratory Ann Arbor, Michigan January 1980" }, { "spans": [ { "offset": 748, "length": 13 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 2.8465, 6.9745, 5.0329, 7.0428, 5.0233, 7.3488, 2.8369, 7.2804 ] } ], "content": "GLERL LIBRARY" }, { "spans": [ { "offset": 762, "length": 4 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 0.9759, 9.2595, 1.3682, 9.2595, 1.3682, 9.3981, 0.9759, 9.3981 ] } ], "content": "NOAA" }, { "spans": [ { "offset": 767, "length": 7 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 0.7989, 9.924, 0.8369, 9.845, 1.0908, 9.967, 1.0528, 10.0459 ] } ], "content": "DEPARTM" }, { "spans": [ { "offset": 775, "length": 67 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 1.9567, 9.2349, 3.9249, 9.2451, 3.9216, 9.872, 1.9534, 9.8618 ] } ], "content": "UNITED STATES DEPARTMENT OF COMMERCE Philip M. Klutznick, Secretary" }, { "spans": [ { "offset": 843, "length": 20 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 4.2004, 9.2547, 5.5256, 9.2547, 5.5256, 9.3886, 4.2004, 9.3886 ] } ], "content": "NATIONAL OCEANIC AND" }, { "spans": [ { "offset": 864, "length": 58 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 4.21, 9.4937, 5.9226, 9.4937, 5.9226, 9.8666, 4.21, 9.8666 ] } ], "content": "ATMOSPHERIC ADMINISTRATION Richard A. Frank, Administrator" }, { "spans": [ { "offset": 923, "length": 22 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 6.2432, 9.2547, 7.4923, 9.2595, 7.4918, 9.3981, 6.2426, 9.3934 ] } ], "content": "Environmental Research" }, { "spans": [ { "offset": 946, "length": 37 } ], "boundingRegions": [ { "pageNumber": 2, "polygon": [ 6.2527, 9.4913, 7.5506, 9.4961, 7.5492, 9.8618, 6.2514, 9.857 ] } ], "content": "Laboratories Wilmot N. Hess, Director" }, { "spans": [ { "offset": 984, "length": 6 } ], "boundingRegions": [ { "pageNumber": 3, "polygon": [ 3.9498, 4.0155, 4.4614, 4.0155, 4.4614, 4.1302, 3.9498, 4.1302 ] } ], "content": "NOTICE" }, { "spans": [ { "offset": 991, "length": 721 } ], "boundingRegions": [ { "pageNumber": 3, "polygon": [ 1.462, 4.3348, 6.5461, 4.3465, 6.5411, 6.5034, 1.457, 6.4917 ] } ], "content": "The NOAA Environmental Research Laboratories do not approve, recommend, or endorse any proprietary product or proprietary material mentioned in this publication. No reference shall be made to the NOAA Environmental Research Laboratories, or to this publication furnished by the NOAA Environmental Research Laboratories, in any advertising or sales promotion which would indicate or imply that the NOAA Environmental Research Laboratories approve, recommend, or endorse any proprietary product or proprietary material mentioned herein, or which has as its purpose an intent to cause directly or indirectly the advertised product to be used or purchased because of this NOAA Environmental Research Laboratories publication." }, { "spans": [ { "offset": 1713, "length": 11 } ], "boundingRegions": [ { "pageNumber": 3, "polygon": [ 3.3703, 7.0367, 5.1739, 7.0032, 5.1796, 7.3091, 3.376, 7.3426 ] } ], "content": "/34880 3PBL" }, { "spans": [ { "offset": 1725, "length": 2 } ], "boundingRegions": [ { "pageNumber": 3, "polygon": [ 4.1554, 9.9383, 4.3228, 9.9383, 4.3228, 10.0626, 4.1554, 10.0626 ] } ], "content": "ii" }, { "spans": [ { "offset": 1728, "length": 8 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 3.9249, 1.1727, 4.5951, 1.1727, 4.5951, 1.2923, 3.9249, 1.2923 ] } ], "content": "CONTENTS" }, { "spans": [ { "offset": 1737, "length": 4 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.749, 1.4981, 7.1086, 1.5125, 7.1032, 1.6465, 6.7436, 1.6321 ] } ], "content": "Page" }, { "spans": [ { "offset": 1742, "length": 8 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.1057, 1.8571, 1.7662, 1.8571, 1.7662, 1.972, 1.1057, 1.972 ] } ], "content": "Abstract" }, { "spans": [ { "offset": 1751, "length": 1 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.9357, 1.8284, 7.0219, 1.8318, 7.017, 1.9528, 6.9308, 1.9494 ] } ], "content": "1" }, { "spans": [ { "offset": 1753, "length": 15 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.11, 2.1893, 2.5273, 2.1826, 2.5278, 2.2975, 1.1105, 2.3042 ] } ], "content": "1. INTRODUCTION" }, { "spans": [ { "offset": 1769, "length": 1 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.9405, 2.1539, 7.0218, 2.1539, 7.0218, 2.2639, 6.9405, 2.2639 ] } ], "content": "1" }, { "spans": [ { "offset": 1771, "length": 10 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.1009, 2.5224, 2.1061, 2.5224, 2.1061, 2.6373, 1.1009, 2.6373 ] } ], "content": "2. METHODS" }, { "spans": [ { "offset": 1782, "length": 1 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.9357, 2.5081, 7.017, 2.5081, 7.017, 2.6134, 6.9357, 2.6134 ] } ], "content": "2" }, { "spans": [ { "offset": 1784, "length": 20 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.5269, 2.8431, 3.274, 2.8431, 3.274, 3.001, 1.5269, 3.001 ] } ], "content": "2.1 Sampling Program" }, { "spans": [ { "offset": 1805, "length": 1 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.9498, 2.8217, 7.0314, 2.8287, 7.0218, 2.9388, 6.9402, 2.9317 ] } ], "content": "2" }, { "spans": [ { "offset": 1807, "length": 21 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.5173, 3.1829, 3.3649, 3.1829, 3.3649, 3.3169, 1.5173, 3.3169 ] } ], "content": "2.2 Chemical Analyses" }, { "spans": [ { "offset": 1829, "length": 2 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.8543, 3.1542, 7.0314, 3.1542, 7.0314, 3.2739, 6.8543, 3.2739 ] } ], "content": "20" }, { "spans": [ { "offset": 1832, "length": 19 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.0961, 3.5036, 2.8576, 3.5036, 2.8576, 3.652, 1.0961, 3.652 ] } ], "content": "3. PRECISION LIMITS" }, { "spans": [ { "offset": 1852, "length": 2 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.8256, 3.4605, 7.0314, 3.4605, 7.0314, 3.6281, 6.8256, 3.6281 ] } ], "content": "21" }, { "spans": [ { "offset": 1855, "length": 23 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.1001, 3.856, 7.0266, 3.8135, 7.0275, 3.9435, 1.101, 3.986 ] } ], "content": "4. DATA PRESENTATION 23" }, { "spans": [ { "offset": 1879, "length": 18 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.1005, 4.1944, 2.7757, 4.1881, 2.7762, 4.3077, 1.1009, 4.3141 ] } ], "content": "5. ACKNOWLEDGMENTS" }, { "spans": [ { "offset": 1898, "length": 2 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.8591, 4.1498, 7.041, 4.1498, 7.041, 4.2742, 6.8591, 4.2742 ] } ], "content": "23" }, { "spans": [ { "offset": 1901, "length": 13 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.1057, 4.5231, 2.3598, 4.5231, 2.3598, 4.6476, 1.1057, 4.6476 ] } ], "content": "6. REFERENCES" }, { "spans": [ { "offset": 1915, "length": 2 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.8591, 4.4848, 7.0314, 4.4848, 7.0314, 4.6093, 6.8591, 4.6093 ] } ], "content": "24" }, { "spans": [ { "offset": 1918, "length": 29 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.0997, 4.8645, 3.7861, 4.8405, 3.7873, 4.9778, 1.1009, 5.0017 ] } ], "content": "Appendix A. LIMNOLOGICAL DATA" }, { "spans": [ { "offset": 1948, "length": 10 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.1849, 4.8916, 7.0369, 4.8964, 7.0362, 5.0257, 6.1842, 5.0209 ] } ], "content": "Microfiche" }, { "spans": [ { "offset": 1959, "length": 41 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.0958, 5.1477, 4.8487, 5.1406, 4.8491, 5.3464, 1.0961, 5.3535 ] } ], "content": "Appendix B. WIND, WAVE, AND SEDIMENT DATA" }, { "spans": [ { "offset": 2001, "length": 6 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.5288, 5.1549, 7.0362, 5.1549, 7.0362, 5.2841, 6.5288, 5.2841 ] } ], "content": "Inside" }, { "spans": [ { "offset": 2008, "length": 33 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 1.1104, 5.3641, 4.887, 5.466, 4.8775, 5.8202, 1.1008, 5.7183 ] } ], "content": "Appendix C. STATISTICAL SUMMARY -" }, { "spans": [ { "offset": 2042, "length": 10 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.1794, 5.3894, 7.024, 5.4038, 7.0218, 5.533, 6.1772, 5.5186 ] } ], "content": "Back Cover" }, { "spans": [ { "offset": 2053, "length": 1 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 6.9405, 9.1755, 7.1415, 9.1755, 7.1415, 9.3813, 6.9405, 9.3813 ] } ], "content": "\u00a3" }, { "spans": [ { "offset": 2055, "length": 3 } ], "boundingRegions": [ { "pageNumber": 4, "polygon": [ 4.1356, 9.9317, 4.3845, 9.9317, 4.3845, 10.0466, 4.1356, 10.0466 ] } ], "content": "iii" }, { "spans": [ { "offset": 2059, "length": 7 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 3.9785, 1.2318, 4.5716, 1.2366, 4.5707, 1.3464, 3.9776, 1.3416 ] } ], "content": "FIGURES" }, { "spans": [ { "offset": 2067, "length": 4 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 6.8823, 1.5516, 7.2309, 1.5612, 7.2273, 1.695, 6.8786, 1.6855 ] } ], "content": "Page" }, { "spans": [ { "offset": 2072, "length": 61 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 1.0747, 1.8717, 7.1402, 1.9002, 7.1395, 2.0434, 1.074, 2.0149 ] } ], "content": "1. Station locations in Southern Lake Michigan during 1975. 3" }, { "spans": [ { "offset": 2134, "length": 65 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 1.08, 2.1942, 7.1455, 2.2233, 7.1448, 2.3761, 1.0793, 2.347 ] } ], "content": "2. Station locations at Little Sable Point, Mich., during 1975. 4" }, { "spans": [ { "offset": 2200, "length": 58 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 1.0747, 2.5491, 7.1402, 2.5543, 7.1401, 2.7033, 1.0746, 2.6981 ] } ], "content": "3. Station locations at Grand Haven, Mich., during 1975. 5" }, { "spans": [ { "offset": 2259, "length": 57 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 1.0747, 2.8627, 7.145, 2.8897, 7.1443, 3.0377, 1.074, 3.0107 ] } ], "content": "4. Station locations at St. Joseph, Mich., during 1975. 6" }, { "spans": [ { "offset": 2317, "length": 55 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 1.0795, 3.2175, 7.145, 3.2227, 7.1449, 3.3624, 1.0794, 3.3572 ] } ], "content": "5. Station locations at Manitowoc, Wis., during 1975. 7" }, { "spans": [ { "offset": 2373, "length": 61 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 1.0794, 3.5472, 7.1451, 3.5521, 7.1449, 3.7009, 1.0793, 3.696 ] } ], "content": "6. Station locations at Port Washington, Wis., during 1975. 8" }, { "spans": [ { "offset": 2435, "length": 53 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 1.0751, 3.8657, 7.1402, 3.8876, 7.1397, 4.0356, 1.0746, 4.0137 ] } ], "content": "7. Station locations at Kenosha, Wis., during 1975. 9" }, { "spans": [ { "offset": 2489, "length": 60 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 1.0747, 4.2156, 7.1498, 4.2217, 7.1496, 4.3697, 1.0746, 4.3636 ] } ], "content": "8. Station locations at Michigan City, Ind., during 1975. 10" }, { "spans": [ { "offset": 2550, "length": 2 } ], "boundingRegions": [ { "pageNumber": 5, "polygon": [ 4.179, 9.9019, 4.351, 9.9019, 4.351, 10.0117, 4.179, 10.0117 ] } ], "content": "iv" }, { "spans": [ { "offset": 2553, "length": 6 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 4.0065, 1.3863, 4.5133, 1.3863, 4.5133, 1.4962, 4.0065, 1.4962 ] } ], "content": "TABLES" }, { "spans": [ { "offset": 2560, "length": 4 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 7.0138, 1.7066, 7.3503, 1.7114, 7.3484, 1.8404, 7.0119, 1.8356 ] } ], "content": "Page" }, { "spans": [ { "offset": 2565, "length": 82 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1857, 2.0364, 7.2194, 2.0364, 7.2194, 2.3519, 1.1857, 2.3519 ] } ], "content": "1. Station locations in Lake Michigan during 1975 (by latitude and longitude) . 11" }, { "spans": [ { "offset": 2648, "length": 95 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1858, 2.5332, 7.2243, 2.5391, 7.224, 2.8545, 1.1855, 2.8487 ] } ], "content": "2. Station locations at Little Sable Point, Mich., during 1975 (by latitude and longitude) . 12" }, { "spans": [ { "offset": 2744, "length": 88 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1761, 3.026, 7.2241, 3.026, 7.2241, 3.351, 1.1761, 3.351 ] } ], "content": "3. Station locations at Grand Haven, Mich., during 1975 (by latitude and longitude) . 12" }, { "spans": [ { "offset": 2833, "length": 87 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1809, 3.5327, 7.2289, 3.5327, 7.2289, 3.8529, 1.1809, 3.8529 ] } ], "content": "4. Station locations at St. Joseph, Mich., during 1975 (by latitude and longitude) . 13" }, { "spans": [ { "offset": 2921, "length": 85 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1717, 4.025, 7.2244, 4.0379, 7.2237, 4.362, 1.171, 4.3492 ] } ], "content": "5. Station locations at Manitowoc, Wis., during 1975 (by latitude and longitude) . 14" }, { "spans": [ { "offset": 3007, "length": 91 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1764, 4.527, 7.2199, 4.5385, 7.2193, 4.8628, 1.1758, 4.8512 ] } ], "content": "6. Station locations at Port Washington, Wis., during 1975 (by latitude and longitude) . 15" }, { "spans": [ { "offset": 3099, "length": 83 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1809, 5.0337, 7.2194, 5.0337, 7.2194, 5.3588, 1.1809, 5.3588 ] } ], "content": "7. Station locations at Kenosha, Wis., during 1975 (by latitude and longitude) . 16" }, { "spans": [ { "offset": 3183, "length": 89 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1809, 5.5452, 7.2194, 5.5452, 7.2194, 5.8655, 1.1809, 5.8655 ] } ], "content": "8. Station locations at Michigan City, Ind., during 1975 (by latitude and longitude) . 17" }, { "spans": [ { "offset": 3273, "length": 22 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1857, 6.0464, 7.2148, 6.0567, 7.2145, 6.1978, 1.1855, 6.1876 ] } ], "content": "9. Cruise schedule. 18" }, { "spans": [ { "offset": 3296, "length": 85 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1857, 6.377, 7.2289, 6.377, 7.2289, 6.6925, 1.1857, 6.6925 ] } ], "content": "10. Shipboard and laboratory measurements in connection with limnological studies. 19" }, { "spans": [ { "offset": 3382, "length": 29 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 1.1769, 6.8598, 7.2152, 6.8893, 7.2143, 7.0547, 1.1761, 7.0251 ] } ], "content": "11. Measurement precision. 22" }, { "spans": [ { "offset": 3412, "length": 1 } ], "boundingRegions": [ { "pageNumber": 6, "polygon": [ 4.2408, 9.9001, 4.3316, 9.9051, 4.3268, 9.9912, 4.236, 9.9861 ] } ], "content": "V" }, { "spans": [ { "offset": 3414, "length": 75 } ], "boundingRegions": [ { "pageNumber": 7, "polygon": [ 1.1007, 1.1056, 7.3473, 1.0961, 7.3475, 1.2205, 1.1009, 1.2301 ] } ], "content": "SOUTHERN LAKE MICHIGAN CHEMICAL AND PHYSICAL CHARACTERISTICS DATA FOR 1975*" }, { "spans": [ { "offset": 3490, "length": 14 } ], "boundingRegions": [ { "pageNumber": 7, "polygon": [ 3.5899, 1.4407, 4.753, 1.4407, 4.753, 1.5556, 3.5899, 1.5556 ] } ], "content": "Gerald L. Bell" }, { "spans": [ { "offset": 3505, "length": 776 } ], "boundingRegions": [ { "pageNumber": 7, "polygon": [ 1.4972, 1.9351, 6.7648, 1.9176, 6.7719, 4.0701, 1.5043, 4.0876 ] } ], "content": "Water samples at standard depths, bottom sediment, and meteorological data were collected at established stations in Southern Lake Michigan, in six harbors, and at one nearshore site during the 1975 open-water season. There were 5 lake cruises and 9 to 11 one-day cruises at each harbor. The samp- ling programs and analytical methods are described. Chemical characteristics of the water and of the bottom sediment sampled during one cruise are listed by cruise for each station and sampling depth. Wind, wave, and sediment data are listed by cruise for each station. The statistical summaries showing lake-wide means, standard deviations, and sample sizes of se- lected variables are presented by depth for each lake cruise period. These means do not include the harbor data." }, { "spans": [ { "offset": 4282, "length": 15 } ], "boundingRegions": [ { "pageNumber": 7, "polygon": [ 3.5903, 4.4411, 4.9354, 4.4465, 4.9349, 4.5662, 3.5899, 4.5608 ] } ], "content": "1. INTRODUCTION" }, { "spans": [ { "offset": 4298, "length": 315 } ], "boundingRegions": [ { "pageNumber": 7, "polygon": [ 1.1001, 4.7775, 7.0218, 4.7672, 7.0233, 5.5862, 1.1015, 5.5965 ] } ], "content": "This basic data report presents data collected aboard the Research Vessel Shenehon between 28 May and 24 November 1975 in Southern Lake Michigan and at seven harbor and nearshore areas by the Chemistry- Biology Group of the U. S. Department of Commerce, NOAA, Great Lakes Environmental Research Laboratory (GLERL) ." }, { "spans": [ { "offset": 4614, "length": 559 } ], "boundingRegions": [ { "pageNumber": 7, "polygon": [ 1.0893, 5.7838, 7.1742, 5.758, 7.1798, 7.0773, 1.0949, 7.103 ] } ], "content": "The GLERL Priority Initiatives Workshop in 1974 resulted in a general agreement that the nearshore zone should be the area of principal focus (Pinsak, 1975) . In line with this objective, an investigation was conducted by GLERL during 1975 under Task 6.6 to describe the broad aspects of the spatial and temporal variability of selected variables in the nearshore environment at sites chosen to reflect a wide range of conditions, to compare the nearshore and open lake environment, and to establish gradients through the nearshore environment (GLERL, 1975) ." }, { "spans": [ { "offset": 5174, "length": 874 } ], "boundingRegions": [ { "pageNumber": 7, "polygon": [ 1.1057, 7.2801, 7.1128, 7.2801, 7.1128, 9.4435, 1.1057, 9.4435 ] } ], "content": "Southern Lake Michigan is subject to a wide range of stresses imposed by municipal, industrial, and agricultural input as well as natural input from streams. An understanding of the variations within the nearshore area is essential to the development and use of this resource. Although a number of significant studies have been conducted in Lake Michigan, the majority of these have been limited to the open lake or to a specific area or problem, and have not been designed to study the variability of different segments of the nearshore area and to compare the areas with each other and the open lake. These data provide information useful in determining the relative roles of the inshore and open-lake areas in the total system, gaining insights into the nearshore variability, managing the coastal zone, and designing new studies in this as well as the other Great Lakes." }, { "spans": [ { "offset": 6049, "length": 28 } ], "boundingRegions": [ { "pageNumber": 7, "polygon": [ 1.1105, 9.7259, 3.437, 9.7307, 3.4367, 9.8695, 1.1102, 9.8647 ] } ], "content": "*GLERL Contribution No. 178." }, { "spans": [ { "offset": 6078, "length": 325 } ], "boundingRegions": [ { "pageNumber": 8, "polygon": [ 1.0734, 1.0892, 7.0395, 1.079, 7.0409, 1.897, 1.0748, 1.9073 ] } ], "content": "Interpretations of the data are not within the scope of this report and will be presented in subsequent publications. Neither meteoro- logical conditions, nor profiles of water temperature and transparency recorded at each station are included in this report. One report on these data is available (Bell and Chambers, 1976) ." }, { "spans": [ { "offset": 6404, "length": 10 } ], "boundingRegions": [ { "pageNumber": 8, "polygon": [ 3.8261, 2.2573, 4.7335, 2.263, 4.7328, 2.3766, 3.8254, 2.3708 ] } ], "content": "2. METHODS" }, { "spans": [ { "offset": 6415, "length": 20 } ], "boundingRegions": [ { "pageNumber": 8, "polygon": [ 3.4051, 2.5877, 5.0775, 2.5972, 5.0767, 2.7405, 3.4043, 2.7309 ] } ], "content": "2.1 Sampling Program" }, { "spans": [ { "offset": 6436, "length": 169 } ], "boundingRegions": [ { "pageNumber": 8, "polygon": [ 1.0835, 2.9274, 7.1538, 2.9157, 7.1547, 3.4019, 1.0844, 3.4136 ] } ], "content": "Water characteristics, bottom sediment, and meteorological data were collected at seven harbor and nearshore areas and along lake traver- ses (Figures 1-8, Tables 1-8) ." }, { "spans": [ { "offset": 6606, "length": 504 } ], "boundingRegions": [ { "pageNumber": 8, "polygon": [ 1.0875, 3.6053, 7.1255, 3.5951, 7.1277, 4.9084, 1.0897, 4.9187 ] } ], "content": "Surveys of 2 days each were conducted at Manitowoc, Port Washington, and Kenosha, Wis .; Michigan City, Ind .; and St. Joseph, Grand Haven, and Little Sable Point, Mich. (Table 9). There were a total of 9 surveys at Michigan City, 11 at Port Washington, and 10 at the other ports. Five regional lake cruises were conducted at 37 stations to connect the 7 sites so that the characteristics of each area could be related. The lake station network includes stations at or in the vicinity of earlier surveys." }, { "spans": [ { "offset": 7111, "length": 579 } ], "boundingRegions": [ { "pageNumber": 8, "polygon": [ 1.1057, 5.1212, 6.9954, 5.0768, 7.0065, 6.5489, 1.1168, 6.5933 ] } ], "content": "Two types of surveys were conducted. Samples were taken the first day at a given site and along all lake traverses at standard depths for analysis aboard the R/V Shenehon and at the GLERL Ann Arbor laboratory. Samples collected at standard depths during the second day at a given site were analyzed aboard ship. In selected nearshore areas, specific conductance measurements were made every 6 min on samples collected at a depth of 1.5 m from the ship's intake system while underway. The shipboard and laboratory determinations made during each cruise are summarized in Table 10." }, { "spans": [ { "offset": 7691, "length": 594 } ], "boundingRegions": [ { "pageNumber": 8, "polygon": [ 1.1135, 6.7854, 7.1757, 6.7688, 7.1798, 8.2605, 1.1176, 8.2771 ] } ], "content": "The ship was navigated and stations were established by using a gyro compass, radar, a sextant, and visual fixes. Loran C equipment was installed prior to the start of the first survey. Positioning tests gave satisfactory results in western Lake Erie, but were too erratic in southern Lake Michigan. Water sample depths were determined by a meter wheel to the nearest meter. The water depth to the bottom was determined by a Raytheon Precision Survey Fathometer, Model DE-723B, with a range of 0 to 250 in feet or fathoms and the depth presented as a graphic record on a calibrated paper chart." }, { "spans": [ { "offset": 8286, "length": 473 } ], "boundingRegions": [ { "pageNumber": 8, "polygon": [ 1.125, 8.4666, 7.1773, 8.4402, 7.1823, 9.5836, 1.13, 9.61 ] } ], "content": "Water samples were taken at multiple levels in 5-1 Niskin bottles. Samples from stations located in shallow water were taken at the surface, mid-depth, and near bottom. In the upper 100 m, samples from stations located in deep water were taken at the surface and spaced at 10-, 20-, or 25-m intervals. Below 100 m the deepest sample was taken near the bottom. The one representative set of bottom sediment samples collec- ted from each area was taken with a Shipek Sampler." }, { "spans": [ { "offset": 8760, "length": 1 } ], "boundingRegions": [ { "pageNumber": 8, "polygon": [ 4.2218, 9.8685, 4.2983, 9.8718, 4.2934, 9.9831, 4.217, 9.9798 ] } ], "content": "2" }, { "spans": [ { "offset": 8762, "length": 3 } ], "boundingRegions": [ { "pageNumber": 9, "polygon": [ 2.7286, 1.053, 2.8675, 1.053, 2.8675, 1.12, 2.7286, 1.12 ] } ], "content": "88\u00ba" }, { "spans": [ { "offset": 8766, "length": 3 } ], "boundingRegions": [ { "pageNumber": 9, "polygon": [ 3.8416, 1.0531, 3.9852, 1.0483, 3.9876, 1.12, 3.844, 1.1248 ] } ], "content": "87\u00ba" }, { "spans": [ { "offset": 8770, "length": 3 } ], "boundingRegions": [ { "pageNumber": 9, "polygon": [ 4.9616, 1.0579, 5.0982, 1.053, 5.1008, 1.1247, 4.9642, 1.1296 ] } ], "content": "86\u00b0" }, { "spans": [ { "offset": 8774, "length": 3 } ], "boundingRegions": [ { "pageNumber": 9, "polygon": [ 6.0796, 1.0578, 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2.1299, 3.3462, 2.1299 ] } ], "content": "Escanabad" }, { "spans": [ { "offset": 8811, "length": 1 } ], "boundingRegions": [ { "pageNumber": 9, "polygon": [ 5.3554, 2.0914, 5.4224, 2.101, 5.4142, 2.1586, 5.3472, 2.1491 ] } ], "content": "O" }, { "spans": [ { "offset": 8813, "length": 13 } ], "boundingRegions": [ { "pageNumber": 9, "polygon": [ 6.1753, 2.1204, 6.5794, 2.13, 6.5756, 2.2891, 6.1715, 2.2795 ] } ], "content": "Mackinaw City" }, { "spans": [ { "offset": 8827, "length": 1 } ], "boundingRegions": [ { "pageNumber": 9, "polygon": [ 4.2701, 2.3692, 4.3133, 2.4025, 4.2655, 2.4647, 4.2222, 2.4315 ] } ], "content": "0" }, { "spans": [ { "offset": 8829, "length": 1 } ], "boundingRegions": [ { "pageNumber": 9, "polygon": [ 5.2445, 2.5412, 5.3067, 2.5508, 5.2993, 2.599, 5.237, 2.5894 ] } ], "content": "0" }, { "spans": [ { "offset": 8831, "length": 1 } ], "boundingRegions": [ { "pageNumber": 9, "polygon": [ 3.4658, 2.958, 3.5329, 2.9771, 3.5137, 3.0441, 3.4467, 3.025 ] } ], "content": 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8.6777, 6.5008, 8.2613, 6.5104 ] } ], "content": "87.50\u00b0" }, { "spans": [ { "offset": 10741, "length": 6 } ], "boundingRegions": [ { "pageNumber": 13, "polygon": [ 8.9813, 6.4052, 9.3956, 6.3955, 9.3983, 6.5103, 8.984, 6.52 ] } ], "content": "87.48\u00b0" }, { "spans": [ { "offset": 10748, "length": 6 } ], "boundingRegions": [ { "pageNumber": 13, "polygon": [ 9.6659, 6.4051, 10.0919, 6.3956, 10.0944, 6.5104, 9.6685, 6.52 ] } ], "content": "87.46\u00b0" }, { "spans": [ { "offset": 10755, "length": 60 } ], "boundingRegions": [ { "pageNumber": 13, "polygon": [ 3.0489, 7.2333, 8.1285, 7.2716, 8.1272, 7.4391, 3.0476, 7.4008 ] } ], "content": "Figure 5. Station locations at Manitowoc, Wis., during 1975." }, { "spans": [ { "offset": 10816, "length": 4 } ], "boundingRegions": [ { "pageNumber": 13, "polygon": [ 9.1379, 5.3999, 9.4722, 5.3902, 9.4762, 5.5289, 9.142, 5.5386 ] } ], "content": "\u00b7 13" }, { "spans": [ { "offset": 10821, "length": 6 } ], "boundingRegions": [ { "pageNumber": 14, "polygon": [ 1.4742, 1.0138, 1.871, 1.0043, 1.8739, 1.1237, 1.4771, 1.1333 ] } ], "content": "43.41\u00b0" }, { "spans": [ { "offset": 10828, "length": 26 } ], "boundingRegions": [ { "pageNumber": 14, "polygon": [ 4.4027, 1.3437, 7.2518, 1.3437, 7.2518, 1.5589, 4.4027, 1.5589 ] } ], "content": "Port Washington, Wisconsin" }, { "spans": [ { "offset": 10855, "length": 6 } ], "boundingRegions": [ { "pageNumber": 14, "polygon": [ 1.4341, 1.7836, 1.8356, 1.7884, 1.8338, 1.9414, 1.4323, 1.9366 ] } ], "content": "43.40\u00b0" }, { "spans": [ { "offset": 10862, "length": 3 } ], "boundingRegions": [ { "pageNumber": 14, "polygon": [ 3.3804, 1.8899, 3.6952, 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6 } ], "boundingRegions": [ { "pageNumber": 14, "polygon": [ 1.4185, 6.6611, 1.8309, 6.6563, 1.8321, 6.7615, 1.4198, 6.7663 ] } ], "content": "43.34\u00b0" }, { "spans": [ { "offset": 10986, "length": 6 } ], "boundingRegions": [ { "pageNumber": 14, "polygon": [ 1.6875, 6.795, 2.0986, 6.7902, 2.0998, 6.9002, 1.6887, 6.905 ] } ], "content": "87.88\u00b0" }, { "spans": [ { "offset": 10993, "length": 6 } ], "boundingRegions": [ { "pageNumber": 14, "polygon": [ 2.8586, 6.7902, 3.2602, 6.7902, 3.2602, 6.9049, 2.8586, 6.9049 ] } ], "content": "87.86\u00b0" }, { "spans": [ { "offset": 11000, "length": 6 } ], "boundingRegions": [ { "pageNumber": 14, "polygon": [ 3.9951, 6.7902, 4.4075, 6.7854, 4.4087, 6.8954, 3.9964, 6.9002 ] } ], "content": "87.84\u00b0" }, { "spans": [ { "offset": 11007, "length": 6 } ], "boundingRegions": [ { "pageNumber": 14, "polygon": [ 5.1484, 6.7806, 5.5643, 6.7806, 5.5643, 6.9002, 5.1484, 6.9002 ] } ], "content": "87.82\u00b0" }, { "spans": [ { "offset": 11014, 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"offset": 11261, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 3.0952, 5.9762, 3.5158, 5.9667, 3.5183, 6.0767, 3.0977, 6.0862 ] } ], "content": "87.80\u00b0" }, { "spans": [ { "offset": 11268, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 3.7526, 5.9619, 4.178, 5.9619, 4.178, 6.0815, 3.7526, 6.0815 ] } ], "content": "87.78\u00b0" }, { "spans": [ { "offset": 11275, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 4.4266, 5.9619, 4.8473, 5.9619, 4.8473, 6.0815, 4.4266, 6.0815 ] } ], "content": "87.76\u00b0" }, { "spans": [ { "offset": 11282, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 5.0911, 5.9524, 5.5117, 5.9524, 5.5117, 6.0719, 5.0911, 6.0719 ] } ], "content": "87.74\u00b0" }, { "spans": [ { "offset": 11289, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 5.759, 5.9524, 6.1762, 5.9476, 6.1775, 6.0623, 5.7603, 6.0671 ] } ], "content": "87.72\u00b0" }, { "spans": [ { "offset": 11296, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 6.4174, 5.9477, 6.8359, 5.938, 6.8385, 6.0527, 6.42, 6.0623 ] } ], "content": "87.70\u00b0" }, { "spans": [ { "offset": 11303, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 7.0701, 5.9189, 7.4908, 5.9189, 7.4908, 6.0671, 7.0701, 6.0671 ] } ], "content": "87.68\u00b0" }, { "spans": [ { "offset": 11310, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 7.7489, 5.938, 8.1648, 5.938, 8.1648, 6.0528, 7.7489, 6.0528 ] } ], "content": "87.66\u00b0" }, { "spans": [ { "offset": 11317, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 8.4169, 5.9381, 8.8388, 5.9333, 8.8401, 6.0432, 8.4182, 6.048 ] } ], "content": "87.64\u00b0" }, { "spans": [ { "offset": 11324, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 9.0718, 5.9476, 9.4842, 5.9428, 9.4855, 6.0528, 9.0731, 6.0576 ] } ], "content": "87.62\u00b0" }, { "spans": [ { "offset": 11331, "length": 6 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 9.7171, 5.9524, 10.1247, 5.9476, 10.126, 6.0575, 9.7184, 6.0623 ] } ], "content": "87.60\u00b0" }, { "spans": [ { "offset": 11338, "length": 58 } ], "boundingRegions": [ { "pageNumber": 15, "polygon": [ 3.1357, 7.2719, 8.0501, 7.2672, 8.0503, 7.4393, 3.1359, 7.4441 ] } ], "content": "Figure 7. Station locations at Kenosha, Wis., during 1975." }, { "spans": [ { "offset": 11397, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 7.4381, 2.8511, 7.5434, 2.8597, 7.5242, 3.094, 7.419, 3.0854 ] } ], "content": "7" }, { "spans": [ { "offset": 11399, "length": 22 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 4.6082, 3.1896, 6.865, 3.1944, 6.8646, 3.4192, 4.6078, 3.4144 ] } ], "content": "Michigan City, Indiana" }, { "spans": [ { "offset": 11422, "length": 6 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 1.3134, 3.3474, 1.7305, 3.357, 1.7268, 3.5149, 1.3098, 3.5053 ] } ], "content": "87.00\u00b0" }, { "spans": [ { "offset": 11429, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 8.901, 3.4622, 8.9918, 3.4622, 8.9918, 3.5866, 8.901, 3.5866 ] } ], "content": "6" }, { "spans": [ { "offset": 11431, "length": 4 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 2.1798, 3.5579, 2.5001, 3.5579, 2.5001, 3.7157, 2.1798, 3.7157 ] } ], "content": ". 12" }, { "spans": [ { "offset": 11436, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 9.0746, 3.6585, 9.226, 3.6487, 9.2341, 3.7729, 9.0826, 3.7826 ] } ], "content": "5" }, { "spans": [ { "offset": 11438, "length": 5 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 8.2208, 3.7203, 9.043, 3.6916, 9.0492, 3.8687, 8.227, 3.8974 ] } ], "content": ".9 87" }, { "spans": [ { "offset": 11444, "length": 2 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 9.2019, 3.8089, 9.2882, 3.8018, 9.298, 3.9189, 9.2117, 3.9261 ] } ], "content": ".." }, { "spans": [ { "offset": 11447, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 8.7815, 4.0409, 8.8723, 4.0409, 8.8723, 4.1556, 8.7815, 4.1556 ] } ], "content": "." }, { "spans": [ { "offset": 11449, "length": 3 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 8.98, 4.113, 9.2882, 4.0504, 9.3144, 4.1791, 9.0061, 4.2417 ] } ], "content": "3 2" }, { 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"length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 9.0731, 4.3804, 9.2117, 4.3756, 9.216, 4.4998, 9.0774, 4.5046 ] } ], "content": "." }, { "spans": [ { "offset": 11476, "length": 9 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 8.662, 4.4569, 9.4459, 4.4569, 9.4459, 4.6243, 8.662, 4.6243 ] } ], "content": ".14 15 16" }, { "spans": [ { "offset": 11486, "length": 4 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 5.985, 4.6147, 6.2814, 4.6147, 6.2814, 4.7582, 5.985, 4.7582 ] } ], "content": "\u00b7 11" }, { "spans": [ { "offset": 11491, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 1.8691, 4.8012, 2.037, 4.852, 1.9892, 5.0098, 1.8213, 4.959 ] } ], "content": "Z" }, { "spans": [ { "offset": 11493, "length": 10 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 7.2948, 4.9495, 8.1505, 4.9495, 8.1505, 5.1073, 7.2948, 5.1073 ] } ], "content": "Kilometers" }, { "spans": [ { "offset": 11504, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 6.42, 5.1503, 6.5108, 5.1503, 6.5108, 5.3033, 6.42, 5.3033 ] } ], "content": "H" }, { "spans": [ { "offset": 11506, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 6.4056, 5.2842, 6.5108, 5.2842, 6.5108, 5.4324, 6.4056, 5.4324 ] } ], "content": "0" }, { "spans": [ { "offset": 11508, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 7.6581, 5.3033, 7.7489, 5.3033, 7.7489, 5.4324, 7.6581, 5.4324 ] } ], "content": "5" }, { "spans": [ { "offset": 11510, "length": 2 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 8.8723, 5.289, 9.0348, 5.289, 9.0348, 5.442, 8.8723, 5.442 ] } ], "content": "10" }, { "spans": [ { "offset": 11513, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 9.0157, 5.5281, 9.1113, 5.5281, 9.1113, 5.7528, 9.0157, 5.7528 ] } ], "content": "1" }, { "spans": [ { "offset": 11515, "length": 6 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 3.6522, 5.7911, 4.0728, 5.7911, 4.0728, 5.9441, 3.6522, 5.9441 ] } ], "content": "41.90\u00b0" }, { "spans": [ { "offset": 11522, "length": 6 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 6.245, 5.8197, 6.6466, 5.8102, 6.6494, 5.9298, 6.2479, 5.9393 ] } ], "content": "41.80\u00b0" }, { "spans": [ { "offset": 11529, "length": 6 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 8.8252, 5.8295, 9.2124, 5.8152, 9.2165, 5.925, 8.8293, 5.9393 ] } ], "content": "41.70\u00b0" }, { "spans": [ { "offset": 11536, "length": 64 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 2.8682, 7.1731, 8.2797, 7.1779, 8.2795, 7.3501, 2.868, 7.3453 ] } ], "content": "Figure 8. Station locations at Michigan City, Ind., during 1975." }, { "spans": [ { "offset": 11601, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 8.9775, 4.0074, 9.0585, 3.9963, 9.0731, 4.103, 8.992, 4.1141 ] } ], "content": "C" }, { "spans": [ { "offset": 11603, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 9.3456, 3.9691, 9.4316, 3.9691, 9.4316, 4.103, 9.3456, 4.103 ] } ], "content": "1" }, { "spans": [ { "offset": 11605, "length": 6 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 9.7375, 3.9643, 10.1534, 3.9643, 10.1534, 4.0791, 9.7375, 4.0791 ] } ], "content": "86.90\u00b0" }, { "spans": [ { "offset": 11612, "length": 3 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 8.2963, 4.5287, 8.6046, 4.5238, 8.6069, 4.6721, 8.2987, 4.6769 ] } ], "content": ".13" }, { "spans": [ { "offset": 11616, "length": 1 } ], "boundingRegions": [ { "pageNumber": 16, "polygon": [ 2.0626, 5.0472, 2.1225, 4.8873, 2.6412, 5.0813, 2.5814, 5.2412 ] } ], "content": "1" }, { "spans": [ { "offset": 11618, "length": 83 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.2833, 1.1439, 6.5391, 1.1535, 6.5384, 1.4861, 2.2826, 1.4765 ] } ], "content": "Table 1. Station Locations in Lake Michigan During 1975 (by Latitude and Longitude)" }, { "spans": [ { "offset": 11702, "length": 7 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.2881, 1.9768, 2.8829, 1.9816, 2.8816, 2.1347, 2.2869, 2.1299 ] } ], "content": "Station" }, { "spans": [ { "offset": 11710, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.614, 2.0007, 4.2938, 2.0007, 4.2938, 2.1251, 3.614, 2.1251 ] } ], "content": "Latitude" }, { "spans": [ { "offset": 11719, "length": 9 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6915, 2.0055, 6.4574, 2.0055, 6.4574, 2.1443, 5.6915, 2.1443 ] } ], "content": "Longitude" }, { "spans": [ { "offset": 11729, "length": 2 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.3742, 2.4985, 2.5418, 2.4985, 2.5418, 2.6181, 2.3742, 2.6181 ] } ], "content": "32" }, { "spans": [ { "offset": 11732, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.614, 2.4793, 4.2938, 2.4793, 4.2938, 2.6373, 3.614, 2.6373 ] } ], "content": "44.083\u00baN" }, { "spans": [ { "offset": 11741, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6953, 2.4985, 6.376, 2.4937, 6.377, 2.6277, 5.6963, 2.6325 ] } ], "content": "87.597\u00b0W" }, { "spans": [ { "offset": 11750, "length": 2 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.379, 2.666, 2.5418, 2.666, 2.5418, 2.7904, 2.379, 2.7904 ] } ], "content": "33" }, { "spans": [ { "offset": 11753, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.6236, 2.6612, 4.2938, 2.6612, 4.2938, 2.7904, 3.6236, 2.7904 ] } ], "content": "44.085\u00b0N" }, { "spans": [ { "offset": 11762, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6819, 2.6469, 6.3856, 2.6469, 6.3856, 2.8096, 5.6819, 2.8096 ] } ], "content": "87.346\u00b0W" }, { "spans": [ { "offset": 11771, "length": 2 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.3742, 2.8335, 2.5418, 2.8335, 2.5418, 2.9532, 2.3742, 2.9532 ] } ], "content": "34" }, { "spans": [ { "offset": 11774, "length": 9 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.6227, 2.8335, 4.2938, 2.8287, 4.2947, 2.958, 3.6236, 2.9628 ] } ], "content": "43. 980\u00b0N" }, { "spans": [ { "offset": 11784, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6867, 2.824, 6.3856, 2.824, 6.3856, 2.9771, 5.6867, 2.9771 ] } ], "content": "87.049\u00b0W" }, { "spans": [ { "offset": 11793, "length": 2 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.3742, 3.001, 2.5418, 3.001, 2.5418, 3.1207, 2.3742, 3.1207 ] } ], "content": "35" }, { "spans": [ { "offset": 11796, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.6236, 2.9963, 4.2938, 2.9963, 4.2938, 3.1303, 3.6236, 3.1303 ] } ], "content": "43.907\u00baN" }, { "spans": [ { "offset": 11805, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6915, 2.9915, 6.3808, 2.9915, 6.3808, 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"boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.6188, 7.8592, 4.289, 7.8592, 4.289, 7.9884, 3.6188, 7.9884 ] } ], "content": "43.225\u00b0N" }, { "spans": [ { "offset": 12426, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6915, 7.8592, 6.3712, 7.8592, 6.3712, 7.9932, 5.6915, 7.9932 ] } ], "content": "36.348\u00b0W" }, { "spans": [ { "offset": 12435, "length": 3 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.2833, 8.0315, 2.537, 8.0315, 2.537, 8.1464, 2.2833, 8.1464 ] } ], "content": "108" }, { "spans": [ { "offset": 12439, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.6092, 8.0315, 4.2938, 8.0315, 4.2938, 8.156, 3.6092, 8.156 ] } ], "content": "43.377\u00baN" }, { "spans": [ { "offset": 12448, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6867, 8.0172, 6.3712, 8.0172, 6.3712, 8.1703, 5.6867, 8.1703 ] } ], "content": "86.429\u00b0W" }, { "spans": [ { "offset": 12457, "length": 3 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.286, 8.2039, 2.537, 8.199, 2.5391, 8.3091, 2.2881, 8.3139 ] } ], "content": "109" }, { "spans": [ { "offset": 12461, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.6188, 8.199, 4.289, 8.199, 4.289, 8.3235, 3.6188, 8.3235 ] } ], "content": "43.450\u00b0N" }, { "spans": [ { "offset": 12470, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6963, 8.199, 6.3712, 8.199, 6.3712, 8.3283, 5.6963, 8.3283 ] } ], "content": "86.617\u00b0W" }, { "spans": [ { "offset": 12479, "length": 3 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.2811, 8.3666, 2.5322, 8.3618, 2.5344, 8.4766, 2.2833, 8.4814 ] } ], "content": "110" }, { "spans": [ { "offset": 12483, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.6188, 8.357, 4.289, 8.357, 4.289, 8.4862, 3.6188, 8.4862 ] } ], "content": "43.652\u00baN" }, { "spans": [ { "offset": 12492, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6915, 8.3618, 6.3712, 8.3618, 6.3712, 8.491, 5.6915, 8.491 ] } ], "content": "86.547\u00baW" }, { "spans": [ { "offset": 12501, "length": 3 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 2.2881, 8.5293, 2.5274, 8.5293, 2.5274, 8.649, 2.2881, 8.649 ] } ], "content": "111" }, { "spans": [ { "offset": 12505, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 3.6092, 8.5245, 4.2938, 8.5245, 4.2938, 8.6585, 3.6092, 8.6585 ] } ], "content": "43.782\u00b0N" }, { "spans": [ { "offset": 12514, "length": 8 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 5.6963, 8.5245, 6.3712, 8.5245, 6.3712, 8.6633, 5.6963, 8.6633 ] } ], "content": "86.444\u00b0W" }, { "spans": [ { "offset": 12523, "length": 2 } ], "boundingRegions": [ { "pageNumber": 17, "polygon": [ 4.1023, 10.0035, 4.265, 10.0035, 4.265, 10.1184, 4.1023, 10.1184 ] } ], "content": "11" }, { "spans": [ { "offset": 12526, "length": 96 } ], "boundingRegions": [ { 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Station Locations at Little Sable Point, Mich., During 1975 (by Latitude and Longitude)" }, { "spans": [ { "offset": 12623, "length": 7 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.3241, 2.0316, 2.918, 2.0364, 2.9171, 2.1512, 2.3232, 2.1464 ] } ], "content": "Station" }, { "spans": [ { "offset": 12631, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5579, 2.0269, 4.2274, 2.0269, 4.2274, 2.1512, 3.5579, 2.1512 ] } ], "content": "Latitude" }, { "spans": [ { "offset": 12640, "length": 9 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6237, 2.0221, 6.3793, 2.0221, 6.3793, 2.1655, 5.6237, 2.1655 ] } ], "content": "Longitude" }, { "spans": [ { "offset": 12650, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4149, 2.5384, 2.4867, 2.5384, 2.4867, 2.6483, 2.4149, 2.6483 ] } ], "content": "1" }, { "spans": [ { "offset": 12652, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5531, 2.5097, 4.2417, 2.5097, 4.2417, 2.6579, 3.5531, 2.6579 ] } ], "content": "43.652\u00baN" }, { "spans": [ { "offset": 12661, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6333, 2.5192, 6.298, 2.5192, 6.298, 2.6483, 5.6333, 2.6483 ] } ], "content": "86.547\u00baW" }, { "spans": [ { "offset": 12670, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4102, 2.7057, 2.4915, 2.7057, 2.4915, 2.8108, 2.4102, 2.8108 ] } ], "content": "2" }, { "spans": [ { "offset": 12672, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5531, 2.6674, 4.2465, 2.6674, 4.2465, 2.83, 3.5531, 2.83 ] } ], "content": "43.667\u00baN" }, { "spans": [ { "offset": 12681, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6333, 2.6818, 6.3076, 2.6818, 6.3076, 2.8156, 5.6333, 2.8156 ] } ], "content": "86.547\u00b0W" }, { "spans": [ { "offset": 12690, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4149, 2.8682, 2.4915, 2.8682, 2.4915, 2.9829, 2.4149, 2.9829 ] } ], "content": "3" }, { "spans": [ { "offset": 12692, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5579, 2.8586, 4.2417, 2.8586, 4.2417, 2.9877, 3.5579, 2.9877 ] } ], "content": "43.667\u00baN" }, { "spans": [ { "offset": 12701, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6333, 2.8539, 6.3076, 2.8539, 6.3076, 2.9829, 5.6333, 2.9829 ] } ], "content": "86.552\u00b0W" }, { "spans": [ { "offset": 12710, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4197, 3.037, 2.4962, 3.0403, 2.4915, 3.1502, 2.4149, 3.1469 ] } ], "content": "4" }, { "spans": [ { "offset": 12712, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5674, 3.0212, 4.2417, 3.0212, 4.2417, 3.1502, 3.5674, 3.1502 ] } ], "content": "43.667\u00baN" }, { "spans": [ { "offset": 12721, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6237, 3.0068, 6.3123, 3.0068, 6.3123, 3.1598, 5.6237, 3.1598 ] } ], "content": "86.557\u00b0W" }, { "spans": [ { "offset": 12730, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4199, 3.1994, 2.501, 3.2028, 2.4962, 3.3176, 2.4151, 3.3142 ] } ], "content": "5" }, { "spans": [ { "offset": 12732, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5666, 3.1932, 4.2456, 3.1885, 4.2465, 3.3128, 3.5674, 3.3176 ] } ], "content": "43.667\u00baN" }, { "spans": [ { "offset": 12741, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6285, 3.1646, 6.3171, 3.1646, 6.3171, 3.3271, 5.6285, 3.3271 ] } ], "content": "86.567\u00b0W" }, { "spans": [ { "offset": 12750, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4197, 3.3701, 2.4962, 3.3701, 2.4962, 3.4801, 2.4197, 3.4801 ] } ], "content": "6" }, { "spans": [ { "offset": 12752, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5579, 3.3558, 4.2465, 3.3558, 4.2465, 3.4849, 3.5579, 3.4849 ] } ], "content": "43.667\u00baN" }, { "spans": [ { "offset": 12761, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6333, 3.351, 6.3076, 3.351, 6.3076, 3.4801, 5.6333, 3.4801 ] } ], "content": "86.578\u00b0W" }, { "spans": [ { "offset": 12770, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4197, 3.5422, 2.4962, 3.5422, 2.4962, 3.657, 2.4197, 3.657 ] } ], "content": "7" }, { "spans": [ { "offset": 12772, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5722, 3.5279, 4.2417, 3.5279, 4.2417, 3.657, 3.5722, 3.657 ] } ], "content": "43.652\u00baN" }, { "spans": [ { "offset": 12781, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6381, 3.504, 6.3076, 3.504, 6.3076, 3.6665, 5.6381, 3.6665 ] } ], "content": "86.613\u00b0W" }, { "spans": [ { "offset": 12790, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4197, 3.7064, 2.4915, 3.7095, 2.4867, 3.8195, 2.4149, 3.8164 ] } ], "content": "8" }, { "spans": [ { "offset": 12792, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5674, 3.6952, 4.2513, 3.6952, 4.2513, 3.8195, 3.5674, 3.8195 ] } ], "content": "43.652\u00b0N" }, { "spans": [ { "offset": 12801, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6274, 3.6761, 6.3123, 3.6713, 6.3134, 3.829, 5.6285, 3.8338 ] } ], "content": "86.582\u00b0W" }, { "spans": [ { "offset": 12810, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4197, 3.8673, 2.4962, 3.8673, 2.4962, 3.9725, 2.4197, 3.9725 ] } ], "content": "9" }, { "spans": [ { "offset": 12812, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5665, 3.8577, 4.2417, 3.8529, 4.2426, 3.982, 3.5674, 3.9868 ] } ], "content": "43.637\u00b0N" }, { "spans": [ { "offset": 12821, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6429, 3.8482, 6.3171, 3.8482, 6.3171, 3.982, 5.6429, 3.982 ] } ], "content": "86.578\u00b0W" }, { "spans": [ { "offset": 12830, "length": 2 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.3384, 4.0442, 2.5058, 4.0442, 2.5058, 4.1589, 2.3384, 4.1589 ] } ], "content": "10" }, { "spans": [ { "offset": 12833, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5674, 4.025, 4.2417, 4.025, 4.2417, 4.1541, 3.5674, 4.1541 ] } ], "content": "43.637\u00b0N" }, { "spans": [ { "offset": 12842, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6429, 4.0203, 6.3123, 4.0203, 6.3123, 4.1493, 5.6429, 4.1493 ] } ], "content": "86.567\u00b0W" }, { "spans": [ { "offset": 12851, "length": 2 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.3289, 4.1876, 2.5151, 4.1932, 2.5103, 4.351, 2.3241, 4.3453 ] } ], "content": "11" }, { "spans": [ { "offset": 12854, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5722, 4.1971, 4.2513, 4.1971, 4.2513, 4.331, 3.5722, 4.331 ] } ], "content": "43.637\u00b0N" }, { "spans": [ { "offset": 12863, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6476, 4.1924, 6.3219, 4.1924, 6.3219, 4.3166, 5.6476, 4.3166 ] } ], "content": "86.557\u00b0W" }, { "spans": [ { "offset": 12872, "length": 2 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.3384, 4.374, 2.501, 4.374, 2.501, 4.4983, 2.3384, 4.4983 ] } ], "content": "12" }, { "spans": [ { "offset": 12875, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.577, 4.3644, 4.256, 4.3644, 4.256, 4.4935, 3.577, 4.4935 ] } ], "content": "43.637\u00b0N" }, { "spans": [ { "offset": 12884, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6429, 4.3597, 6.3219, 4.3597, 6.3219, 4.484, 5.6429, 4.484 ] } ], "content": "86.552\u00b0W" }, { "spans": [ { "offset": 12893, "length": 2 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.3384, 4.5413, 2.5058, 4.5413, 2.5058, 4.6608, 2.3384, 4.6608 ] } ], "content": "13" }, { "spans": [ { "offset": 12896, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.577, 4.5318, 4.2513, 4.5318, 4.2513, 4.656, 3.577, 4.656 ] } ], "content": "43.637\u00b0N" }, { "spans": [ { "offset": 12905, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6476, 4.5222, 6.3171, 4.5222, 6.3171, 4.6513, 5.6476, 4.6513 ] } ], "content": "86.547\u00baW" }, { "spans": [ { "offset": 12914, "length": 89 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 1.5827, 5.354, 6.7188, 5.3492, 6.7191, 5.69, 1.583, 5.6948 ] } ], "content": "Table 3. Station Locations at Grand Haven, Mich., During 1975 (by Latitude and Longitude)" }, { "spans": [ { "offset": 13004, "length": 7 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.3576, 6.2192, 2.941, 6.2192, 2.941, 6.3339, 2.3576, 6.3339 ] } ], "content": "Station" }, { "spans": [ { "offset": 13012, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.5866, 6.2192, 4.2608, 6.2192, 4.2608, 6.3339, 3.5866, 6.3339 ] } ], "content": "Latitude" }, { "spans": [ { "offset": 13021, "length": 9 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6467, 6.2048, 6.4118, 6.2001, 6.4128, 6.3483, 5.6476, 6.3531 ] } ], "content": "Longitude" }, { "spans": [ { "offset": 13031, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4484, 6.7211, 2.5154, 6.7211, 2.5154, 6.8359, 2.4484, 6.8359 ] } ], "content": "1" }, { "spans": [ { "offset": 13033, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.6009, 6.7116, 4.2704, 6.7116, 4.2704, 6.8407, 3.6009, 6.8407 ] } ], "content": "43.067\u00baN" }, { "spans": [ { "offset": 13042, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6658, 6.7068, 6.3363, 6.702, 6.3372, 6.8311, 5.6668, 6.8359 ] } ], "content": "86.235\u00b0W" }, { "spans": [ { "offset": 13051, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4484, 6.8885, 2.525, 6.8918, 2.5202, 7.0017, 2.4436, 6.9984 ] } ], "content": "2" }, { "spans": [ { "offset": 13053, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 3.6009, 6.8741, 4.2704, 6.8741, 4.2704, 7.008, 3.6009, 7.008 ] } ], "content": "43.058\u00baN" }, { "spans": [ { "offset": 13062, "length": 8 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 5.6668, 6.8693, 6.3458, 6.8693, 6.3458, 7.0032, 5.6668, 7.0032 ] } ], "content": "86.256\u00b0W" }, { "spans": [ { "offset": 13071, "length": 1 } ], "boundingRegions": [ { "pageNumber": 18, "polygon": [ 2.4484, 7.0606, 2.5296, 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5.6429, 3.6044 ] } ], "content": "87.629\u00b0W" }, { "spans": [ { "offset": 14107, "length": 1 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 2.4294, 3.6489, 2.501, 3.6522, 2.4961, 3.7606, 2.4245, 3.7573 ] } ], "content": "5" }, { "spans": [ { "offset": 14109, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 3.577, 3.6378, 4.2417, 3.6378, 4.2417, 3.7669, 3.577, 3.7669 ] } ], "content": "44.083\u00baN" }, { "spans": [ { "offset": 14118, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 5.6524, 3.6426, 6.3171, 3.6426, 6.3171, 3.7717, 5.6524, 3.7717 ] } ], "content": "87.597\u00baW" }, { "spans": [ { "offset": 14127, "length": 1 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 2.4293, 3.8195, 2.5057, 3.823, 2.5009, 3.9281, 2.4245, 3.9247 ] } ], "content": "6" }, { "spans": [ { "offset": 14129, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 3.5722, 3.8099, 4.2417, 3.8099, 4.2417, 3.9342, 3.5722, 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"87.575\u00b0W" }, { "spans": [ { "offset": 14312, "length": 2 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 2.3384, 5.3205, 2.5154, 5.3205, 2.5154, 5.44, 2.3384, 5.44 ] } ], "content": "15" }, { "spans": [ { "offset": 14315, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 3.5866, 5.3157, 4.2608, 5.3157, 4.2608, 5.44, 3.5866, 5.44 ] } ], "content": "44.099\u00baN" }, { "spans": [ { "offset": 14324, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 5.6524, 5.3014, 6.3363, 5.3014, 6.3363, 5.4639, 5.6524, 5.4639 ] } ], "content": "87.604\u00b0W" }, { "spans": [ { "offset": 14333, "length": 2 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 2.3432, 5.4878, 2.5106, 5.4878, 2.5106, 5.6026, 2.3432, 5.6026 ] } ], "content": "16" }, { "spans": [ { "offset": 14336, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 3.5866, 5.483, 4.2513, 5.483, 4.2513, 5.6073, 3.5866, 5.6073 ] } ], "content": "44.102\u00b0N" 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[ { "offset": 14378, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 3.5722, 5.7938, 4.2608, 5.7938, 4.2608, 5.9515, 3.5722, 5.9515 ] } ], "content": "44.105\u00b0N" }, { "spans": [ { "offset": 14387, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 5.662, 5.8129, 6.341, 5.8129, 6.341, 5.9467, 5.662, 5.9467 ] } ], "content": "87.634\u00b0W" }, { "spans": [ { "offset": 14396, "length": 2 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 2.3528, 5.9945, 2.5154, 5.9945, 2.5154, 6.1045, 2.3528, 6.1045 ] } ], "content": "19" }, { "spans": [ { "offset": 14399, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 3.5857, 5.985, 4.2608, 5.9802, 4.2617, 6.1045, 3.5866, 6.1093 ] } ], "content": "44.106\u00b0N" }, { "spans": [ { "offset": 14408, "length": 8 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 5.6476, 5.9706, 6.3219, 5.9706, 6.3219, 6.1236, 5.6476, 6.1236 ] } ], "content": "87.638\u00b0W" }, { "spans": [ { "offset": 14417, "length": 2 } ], "boundingRegions": [ { "pageNumber": 20, "polygon": [ 4.1412, 9.9878, 4.3087, 9.9813, 4.3136, 10.1102, 4.1461, 10.1167 ] } ], "content": "14" }, { "spans": [ { "offset": 14420, "length": 92 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 1.4888, 1.6465, 6.913, 1.6609, 6.9121, 1.9917, 1.4879, 1.9773 ] } ], "content": "Table 6. Station Locations at Port Washington, Wis., During 1975 (by Latitude and Longitude)" }, { "spans": [ { "offset": 14513, "length": 7 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3265, 2.5033, 2.9163, 2.5081, 2.9153, 2.6277, 2.3255, 2.6229 ] } ], "content": "Station" }, { "spans": [ { "offset": 14521, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5664, 2.5033, 4.2509, 2.5033, 4.2509, 2.6277, 3.5664, 2.6277 ] } ], "content": "Latitude" }, { "spans": [ { "offset": 14530, "length": 9 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6535, 2.5033, 6.4147, 2.5033, 6.4147, 2.6516, 5.6535, 2.6516 ] } ], "content": "Longitude" }, { "spans": [ { "offset": 14540, "length": 1 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.4079, 3.0154, 2.4845, 3.0154, 2.4845, 3.1207, 2.4079, 3.1207 ] } ], "content": "1" }, { "spans": [ { "offset": 14542, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5712, 2.9963, 4.2557, 2.9963, 4.2557, 3.1351, 3.5712, 3.1351 ] } ], "content": "43.386\u00b0N" }, { "spans": [ { "offset": 14551, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6535, 3.001, 6.3285, 3.001, 6.3285, 3.1351, 5.6535, 3.1351 ] } ], "content": "87.868\u00b0W" }, { "spans": [ { "offset": 14560, "length": 1 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.4031, 3.1734, 2.4893, 3.1734, 2.4893, 3.2882, 2.4031, 3.2882 ] } ], "content": "2" }, { "spans": [ { "offset": 14562, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5664, 3.1494, 4.2557, 3.1494, 4.2557, 3.3122, 3.5664, 3.3122 ] } ], "content": "43.385\u00baN" }, { "spans": [ { "offset": 14571, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6487, 3.1542, 6.3429, 3.1542, 6.3429, 3.3169, 5.6487, 3.3169 ] } ], "content": "87.860\u00b0W" }, { "spans": [ { "offset": 14580, "length": 1 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.4127, 3.3409, 2.4941, 3.3409, 2.4941, 3.4605, 2.4127, 3.4605 ] } ], "content": "3" }, { "spans": [ { "offset": 14582, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5664, 3.3217, 4.2557, 3.3217, 4.2557, 3.4797, 3.5664, 3.4797 ] } ], "content": "43.384\u00baN" }, { "spans": [ { "offset": 14591, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6535, 3.3313, 6.3333, 3.3313, 6.3333, 3.4701, 5.6535, 3.4701 ] } ], "content": "87.855\u00b0W" }, { "spans": [ { "offset": 14600, "length": 1 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.4079, 3.5132, 2.4941, 3.5169, 2.4893, 3.6281, 2.4031, 3.6243 ] } ], "content": "4" }, { "spans": [ { "offset": 14602, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.575, 3.5036, 4.2509, 3.4988, 4.2518, 3.6281, 3.5759, 3.6328 ] } ], "content": "43.382\u00baN" }, { "spans": [ { "offset": 14611, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6583, 3.5036, 6.3333, 3.5036, 6.3333, 3.6376, 5.6583, 3.6376 ] } ], "content": "87.851\u00b0W" }, { "spans": [ { "offset": 14620, "length": 1 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.4127, 3.6759, 2.4941, 3.6795, 2.4893, 3.7908, 2.4078, 3.7873 ] } ], "content": "5" }, { "spans": [ { "offset": 14622, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5664, 3.652, 4.2509, 3.652, 4.2509, 3.8147, 3.5664, 3.8147 ] } ], "content": "43.380\u00b0N" }, { "spans": [ { "offset": 14631, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6477, 3.6616, 6.3333, 3.6568, 6.3344, 3.8099, 5.6487, 3.8147 ] } ], "content": "87.842\u00b0W" }, { "spans": [ { "offset": 14640, "length": 1 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.4176, 3.8451, 2.4893, 3.8482, 2.4844, 3.9614, 2.4127, 3.9583 ] } ], "content": "6" }, { "spans": [ { "offset": 14642, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.552, 3.8195, 4.2557, 3.8195, 4.2557, 3.9823, 3.552, 3.9823 ] } ], "content": "43.377\u00baN" }, { "spans": [ { "offset": 14651, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6487, 3.8387, 6.3381, 3.8387, 6.3381, 3.9727, 5.6487, 3.9727 ] } ], "content": "87.832\u00b0W" }, { "spans": [ { "offset": 14660, "length": 1 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.4031, 4.011, 2.4893, 4.0158, 2.4829, 4.1308, 2.3967, 4.126 ] } ], "content": "7" }, { "spans": [ { "offset": 14662, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5759, 4.0062, 4.2557, 4.0062, 4.2557, 4.1354, 3.5759, 4.1354 ] } ], "content": "43.371\u00b0N" }, { "spans": [ { "offset": 14671, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6535, 4.0062, 6.3333, 4.0062, 6.3333, 4.1402, 5.6535, 4.1402 ] } ], "content": "87.868\u00b0W" }, { "spans": [ { "offset": 14680, "length": 1 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.4031, 4.1833, 2.4893, 4.187, 2.4845, 4.2982, 2.3983, 4.2944 ] } ], "content": "8" }, { "spans": [ { "offset": 14682, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5712, 4.1737, 4.2557, 4.1737, 4.2557, 4.3077, 3.5712, 4.3077 ] } ], "content": "43.370\u00b0N" }, { "spans": [ { "offset": 14691, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6535, 4.1737, 6.3429, 4.1737, 6.3429, 4.3125, 5.6535, 4.3125 ] } ], "content": "87.863\u00b0W" }, { "spans": [ { "offset": 14700, "length": 1 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.4079, 4.346, 2.4893, 4.3496, 2.4845, 4.4609, 2.4031, 4.4574 ] } ], "content": "9" }, { "spans": [ { "offset": 14702, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5798, 4.3412, 4.2509, 4.3364, 4.2518, 4.4657, 3.5807, 4.4705 ] } ], "content": "43.369\u00baN" }, { "spans": [ { "offset": 14711, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6583, 4.3364, 6.3333, 4.3364, 6.3333, 4.4752, 5.6583, 4.4752 ] } ], "content": "87.858\u00b0W" }, { "spans": [ { "offset": 14720, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3217, 4.5088, 2.4893, 4.5088, 2.4893, 4.6332, 2.3217, 4.6332 ] } ], "content": "10" }, { "spans": [ { "offset": 14723, "length": 9 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5616, 4.4896, 4.2605, 4.4896, 4.2605, 4.6476, 3.5616, 4.6476 ] } ], "content": "43. 366\u00b0N" }, { "spans": [ { "offset": 14733, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6535, 4.5088, 6.3333, 4.5088, 6.3333, 4.6428, 5.6535, 4.6428 ] } ], "content": "87.849\u00b0W" }, { "spans": [ { "offset": 14742, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3265, 4.6811, 2.4797, 4.6811, 2.4797, 4.8007, 2.3265, 4.8007 ] } ], "content": "11" }, { "spans": [ { "offset": 14745, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5759, 4.6763, 4.2557, 4.6763, 4.2557, 4.8103, 3.5759, 4.8103 ] } ], "content": "43.363\u00b0N" }, { "spans": [ { "offset": 14754, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6487, 4.6763, 6.3333, 4.6763, 6.3333, 4.8151, 5.6487, 4.8151 ] } ], "content": "87.840\u00b0W" }, { "spans": [ { "offset": 14763, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3217, 4.8438, 2.4893, 4.8438, 2.4893, 4.9635, 2.3217, 4.9635 ] } ], "content": "12" }, { "spans": [ { "offset": 14766, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5807, 4.839, 4.2557, 4.839, 4.2557, 4.973, 3.5807, 4.973 ] } ], "content": "43.371\u00baN" }, { "spans": [ { "offset": 14775, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6535, 4.8438, 6.3333, 4.8438, 6.3333, 4.9778, 5.6535, 4.9778 ] } ], "content": "87.814\u00b0W" }, { "spans": [ { "offset": 14784, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3265, 5.0113, 2.4941, 5.0113, 2.4941, 5.1358, 2.3265, 5.1358 ] } ], "content": "13" }, { "spans": [ { "offset": 14787, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5693, 5.0113, 4.2586, 5.0018, 4.2605, 5.1358, 3.5711, 5.1453 ] } ], "content": "43.358\u00baN" }, { "spans": [ { "offset": 14796, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6487, 5.0017, 6.3333, 5.0017, 6.3333, 5.1597, 5.6487, 5.1597 ] } ], "content": "87.767\u00b0W" }, { "spans": [ { "offset": 14805, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3265, 5.1788, 2.4893, 5.1788, 2.4893, 5.3033, 2.3265, 5.3033 ] } ], "content": "14" }, { "spans": [ { "offset": 14808, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5616, 5.1549, 4.2653, 5.1597, 4.2642, 5.3225, 3.5605, 5.3177 ] } ], "content": "43.390\u00b0N" }, { "spans": [ { "offset": 14817, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6526, 5.1836, 6.3381, 5.1788, 6.339, 5.3081, 5.6535, 5.3129 ] } ], "content": "87.825\u00b0W" }, { "spans": [ { "offset": 14826, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3231, 5.3513, 2.4941, 5.3464, 2.4975, 5.4659, 2.3265, 5.4708 ] } ], "content": "15" }, { "spans": [ { "offset": 14829, "length": 9 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5712, 5.3464, 4.2509, 5.3464, 4.2509, 5.4756, 3.5712, 5.4756 ] } ], "content": "43. 393\u00baN" }, { "spans": [ { "offset": 14839, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6439, 5.332, 6.3285, 5.332, 6.3285, 5.4947, 5.6439, 5.4947 ] } ], "content": "87.834\u00b0W" }, { "spans": [ { "offset": 14848, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3183, 5.514, 2.4893, 5.5091, 2.4927, 5.6287, 2.3217, 5.6335 ] } ], "content": "16" }, { "spans": [ { "offset": 14851, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5712, 5.5091, 4.2653, 5.5091, 4.2653, 5.6479, 3.5712, 5.6479 ] } ], "content": "43.396\u00b0N" }, { "spans": [ { "offset": 14860, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6583, 5.5091, 6.3381, 5.5091, 6.3381, 5.6527, 5.6583, 5.6527 ] } ], "content": "87.843\u00b0W" }, { "spans": [ { "offset": 14869, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3183, 5.6863, 2.4893, 5.6814, 2.4927, 5.801, 2.3217, 5.8059 ] } ], "content": "17" }, { "spans": [ { "offset": 14872, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5616, 5.6623, 4.2653, 5.6623, 4.2653, 5.8202, 3.5616, 5.8202 ] } ], "content": "43.397\u00baN" }, { "spans": [ { "offset": 14881, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6439, 5.6623, 6.3429, 5.6623, 6.3429, 5.825, 5.6439, 5.825 ] } ], "content": "87.848\u00b0W" }, { "spans": [ { "offset": 14890, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 2.3265, 5.8489, 2.4941, 5.8489, 2.4941, 5.9686, 2.3265, 5.9686 ] } ], "content": "18" }, { "spans": [ { "offset": 14893, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 3.5605, 5.825, 4.269, 5.8202, 4.2701, 5.983, 3.5616, 5.9877 ] } ], "content": "43.398\u00baN" }, { "spans": [ { "offset": 14902, "length": 8 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 5.6535, 5.8441, 6.3381, 5.8441, 6.3381, 5.983, 5.6535, 5.983 ] } ], "content": "87.853\u00b0W" }, { "spans": [ { "offset": 14911, "length": 2 } ], "boundingRegions": [ { "pageNumber": 21, "polygon": [ 4.0116, 9.9413, 4.1839, 9.9413, 4.1839, 10.0753, 4.0116, 10.0753 ] } ], "content": "15" }, { "spans": [ { "offset": 14914, "length": 84 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 1.8459, 1.7209, 6.5849, 1.7209, 6.5849, 2.0603, 1.8459, 2.0603 ] } ], "content": "Table 7. Station Locations at Kenosha, Wis., During 1975 (by Latitude and Longitude)" }, { "spans": [ { "offset": 14999, "length": 7 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.3432, 2.5575, 2.9458, 2.5575, 2.9458, 2.7152, 2.3432, 2.7152 ] } ], "content": "Station" }, { "spans": [ { "offset": 15007, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.5953, 2.5862, 4.2608, 2.5814, 4.2617, 2.6961, 3.5961, 2.7009 ] } ], "content": "Latitude" }, { "spans": [ { "offset": 15016, "length": 9 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6659, 2.5814, 6.4175, 2.5766, 6.4184, 2.7057, 5.6668, 2.7104 ] } ], "content": "Longitude" }, { "spans": [ { "offset": 15026, "length": 1 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.4484, 3.0881, 2.5154, 3.0881, 2.5154, 3.2028, 2.4484, 3.2028 ] } ], "content": "1" }, { "spans": [ { "offset": 15028, "length": 9 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6057, 3.0785, 4.2752, 3.0785, 4.2752, 3.2028, 3.6057, 3.2028 ] } ], "content": "42. 588\u00baN" }, { "spans": [ { "offset": 15038, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6572, 3.0546, 6.3506, 3.0546, 6.3506, 3.2172, 5.6572, 3.2172 ] } ], "content": "87.818\u00b0W" }, { "spans": [ { "offset": 15047, "length": 1 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.4484, 3.2506, 2.5202, 3.2538, 2.5154, 3.3654, 2.4436, 3.3622 ] } ], "content": "2" }, { "spans": [ { "offset": 15049, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6009, 3.2411, 4.28, 3.2411, 4.28, 3.3701, 3.6009, 3.3701 ] } ], "content": "42.588\u00baN" }, { "spans": [ { "offset": 15058, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6763, 3.2411, 6.3602, 3.2411, 6.3602, 3.3701, 5.6763, 3.3701 ] } ], "content": "87.808\u00b0W" }, { "spans": [ { "offset": 15067, "length": 1 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.4484, 3.4179, 2.5298, 3.4213, 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5.6668, 3.7143 ] } ], "content": "87.798\u00b0W" }, { "spans": [ { "offset": 15109, "length": 1 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.4484, 3.7573, 2.5249, 3.7573, 2.5249, 3.8673, 2.4484, 3.8673 ] } ], "content": "5" }, { "spans": [ { "offset": 15111, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6009, 3.7478, 4.28, 3.7478, 4.28, 3.8673, 3.6009, 3.8673 ] } ], "content": "42.590\u00b0N" }, { "spans": [ { "offset": 15120, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6859, 3.7382, 6.3506, 3.7382, 6.3506, 3.8721, 5.6859, 3.8721 ] } ], "content": "87.788\u00b0W" }, { "spans": [ { "offset": 15129, "length": 1 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.4484, 3.9247, 2.5298, 3.9285, 2.5249, 4.0298, 2.4436, 4.0259 ] } ], "content": "6" }, { "spans": [ { "offset": 15131, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6096, 3.9151, 4.28, 3.9103, 4.2808, 4.0346, 3.6105, 4.0394 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"42.576\u00b0N" }, { "spans": [ { "offset": 15242, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6859, 4.7469, 6.3554, 4.7469, 6.3554, 4.8712, 5.6859, 4.8712 ] } ], "content": "87.777\u00b0W" }, { "spans": [ { "offset": 15251, "length": 2 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.3719, 4.9237, 2.5393, 4.9237, 2.5393, 5.0337, 2.3719, 5.0337 ] } ], "content": "12" }, { "spans": [ { "offset": 15254, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6153, 4.9094, 4.28, 4.9094, 4.28, 5.0385, 3.6153, 5.0385 ] } ], "content": "42.591\u00baN" }, { "spans": [ { "offset": 15263, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6859, 4.9046, 6.3554, 4.9046, 6.3554, 5.0289, 5.6859, 5.0289 ] } ], "content": "87.759\u00b0W" }, { "spans": [ { "offset": 15272, "length": 2 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.3719, 5.0863, 2.5393, 5.0863, 2.5393, 5.2106, 2.3719, 5.2106 ] } ], "content": "13" }, { "spans": [ { "offset": 15275, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6153, 5.0767, 4.2895, 5.0767, 4.2895, 5.2058, 3.6153, 5.2058 ] } ], "content": "42.594\u00baN" }, { "spans": [ { "offset": 15284, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6897, 5.0767, 6.3592, 5.0719, 6.3602, 5.201, 5.6907, 5.2058 ] } ], "content": "87.710\u00b0W" }, { "spans": [ { "offset": 15293, "length": 2 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.3637, 5.2586, 2.5393, 5.2536, 2.5427, 5.3729, 2.3671, 5.3779 ] } ], "content": "14" }, { "spans": [ { "offset": 15296, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6153, 5.244, 4.2847, 5.244, 4.2847, 5.3731, 3.6153, 5.3731 ] } ], "content": "42.600\u00b0N" }, { "spans": [ { "offset": 15305, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6907, 5.244, 6.3649, 5.244, 6.3649, 5.3683, 5.6907, 5.3683 ] } ], "content": 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"42.604\u00baN" }, { "spans": [ { "offset": 15347, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6955, 5.5786, 6.3649, 5.5786, 6.3649, 5.7077, 5.6955, 5.7077 ] } ], "content": "87.790\u00b0W" }, { "spans": [ { "offset": 15356, "length": 2 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.3767, 5.7651, 2.5393, 5.7651, 2.5393, 5.8798, 2.3767, 5.8798 ] } ], "content": "17" }, { "spans": [ { "offset": 15359, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6153, 5.7364, 4.2943, 5.7364, 4.2943, 5.8942, 3.6153, 5.8942 ] } ], "content": "42.603\u00baN" }, { "spans": [ { "offset": 15368, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.7002, 5.7316, 6.3697, 5.7316, 6.3697, 5.8846, 5.7002, 5.8846 ] } ], "content": "87.800\u00b0W" }, { "spans": [ { "offset": 15377, "length": 2 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.3815, 5.9276, 2.5441, 5.9276, 2.5441, 6.0423, 2.3815, 6.0423 ] } ], "content": "18" }, { "spans": [ { "offset": 15380, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6153, 5.8989, 4.3039, 5.8989, 4.3039, 6.0567, 3.6153, 6.0567 ] } ], "content": "42.603\u00baN" }, { "spans": [ { "offset": 15389, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6946, 5.9133, 6.3641, 5.9085, 6.3649, 6.0328, 5.6955, 6.0376 ] } ], "content": "87.805\u00b0W" }, { "spans": [ { "offset": 15398, "length": 2 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 2.3779, 6.095, 2.5393, 6.0901, 2.5429, 6.2095, 2.3815, 6.2144 ] } ], "content": "19" }, { "spans": [ { "offset": 15401, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 3.6153, 6.0662, 4.2895, 6.0662, 4.2895, 6.2192, 3.6153, 6.2192 ] } ], "content": "42.603\u00baN" }, { "spans": [ { "offset": 15410, "length": 8 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 5.6993, 6.0806, 6.3688, 6.0758, 6.3697, 6.2001, 5.7002, 6.2049 ] } ], "content": "87.810\u00b0W" }, { "spans": [ { "offset": 15419, "length": 2 } ], "boundingRegions": [ { "pageNumber": 22, "polygon": [ 4.1748, 9.9766, 4.3421, 9.9766, 4.3421, 10.0961, 4.1748, 10.0961 ] } ], "content": "16" }, { "spans": [ { "offset": 15422, "length": 90 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 1.6468, 1.6321, 6.8989, 1.6417, 6.8983, 1.9747, 1.6462, 1.9652 ] } ], "content": "Table 8. Station Locations at Michigan City, Ind., During 1975 (by Latitude and Longitude)" }, { "spans": [ { "offset": 15513, "length": 7 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 2.3985, 2.4937, 2.9891, 2.5033, 2.9873, 2.6134, 2.3967, 2.6038 ] } ], "content": "Station" }, { "spans": [ { "offset": 15521, "length": 8 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 3.6384, 2.4985, 4.3134, 2.4985, 4.3134, 2.6229, 3.6384, 2.6229 ] } ], "content": "Latitude" }, { "spans": [ { "offset": 15530, "length": 9 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 5.7257, 2.5033, 6.4773, 2.5033, 6.4773, 2.6421, 5.7257, 2.6421 ] } ], "content": "Longitude" }, { "spans": [ { "offset": 15540, "length": 1 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 2.4798, 2.9963, 2.5612, 2.9963, 2.5612, 3.1016, 2.4798, 3.1016 ] } ], "content": "1" }, { "spans": [ { "offset": 15542, "length": 8 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 3.648, 2.9867, 4.3191, 2.9915, 4.3182, 3.1207, 3.647, 3.1159 ] } ], "content": "41.725\u00b0N" }, { "spans": [ { "offset": 15551, "length": 8 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 5.7304, 2.9915, 6.4007, 2.9915, 6.4007, 3.1303, 5.7304, 3.1303 ] } ], "content": "86.909\u00b0W" }, { "spans": [ { "offset": 15560, "length": 1 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 2.4751, 3.159, 2.5564, 3.159, 2.5564, 3.2643, 2.4751, 3.2643 ] } ], "content": "2" }, { "spans": [ { "offset": 15562, "length": 8 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 3.6432, 3.1542, 4.3278, 3.1542, 4.3278, 3.2834, 3.6432, 3.2834 ] } ], "content": "41.728\u00baN" }, { "spans": [ { "offset": 15571, "length": 8 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 5.7257, 3.159, 6.4007, 3.159, 6.4007, 3.2882, 5.7257, 3.2882 ] } ], "content": "86.912\u00b0W" }, { "spans": [ { "offset": 15580, "length": 1 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 2.4798, 3.3217, 2.5612, 3.3217, 2.5612, 3.4366, 2.4798, 3.4366 ] } ], "content": "3" }, { "spans": [ { "offset": 15582, "length": 8 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 3.6384, 3.2978, 4.3241, 3.3026, 4.323, 3.4653, 3.6372, 3.4605 ] } ], "content": "41.731\u00b0N" }, { "spans": [ { "offset": 15591, "length": 8 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 5.7257, 3.3217, 6.4055, 3.3217, 6.4055, 3.4558, 5.7257, 3.4558 ] } ], "content": "86.914\u00b0W" }, { "spans": [ { "offset": 15600, "length": 1 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 2.4751, 3.4893, 2.566, 3.4893, 2.566, 3.5993, 2.4751, 3.5993 ] } ], "content": "4" }, { "spans": [ { "offset": 15602, "length": 8 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 3.6384, 3.4701, 4.3038, 3.4701, 4.3038, 3.6281, 3.6384, 3.6281 ] } ], "content": "41.738\u00baN" }, { "spans": [ { "offset": 15611, "length": 8 } ], "boundingRegions": [ { "pageNumber": 23, "polygon": [ 5.7257, 3.4893, 6.4007, 3.4893, 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Cruise Schedule" }, { "spans": [ { "offset": 15916, "length": 13 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.4001, 8.7385, 3.4001, 8.3799, 3.5961, 8.3799, 3.5961, 8.7385 ] } ], "content": "Cruise number" }, { "spans": [ { "offset": 15930, "length": 19 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.395, 8.1588, 3.4001, 7.3277, 3.5994, 7.3289, 3.5943, 8.16 ] } ], "content": "Lake Michigan Start" }, { "spans": [ { "offset": 15950, "length": 3 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.5053, 7.4478, 3.5053, 7.2804, 3.5961, 7.2804, 3.5961, 7.4478 ] } ], "content": "End" }, { "spans": [ { "offset": 15954, "length": 12 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.3905, 6.7642, 3.3905, 6.3961, 3.5961, 6.3961, 3.5961, 6.7642 ] } ], "content": "Little Sable" }, { "spans": [ { "offset": 15967, "length": 9 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.5053, 6.071, 3.5101, 5.5253, 3.6009, 5.5261, 3.5961, 6.0718 ] } ], "content": "Manitowoc" }, { "spans": [ { "offset": 15977, "length": 16 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.3905, 5.3739, 3.3857, 4.8329, 3.5951, 4.8311, 3.5999, 5.372 ] } ], "content": "Pt. 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"1" }, { "spans": [ { "offset": 16041, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.845, 8.1552, 3.8642, 7.7967, 3.9548, 7.8015, 3.9356, 8.16 ] } ], "content": "28 May" }, { "spans": [ { "offset": 16048, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.8496, 7.4095, 3.8544, 7.0354, 3.9548, 7.0367, 3.95, 7.4108 ] } ], "content": "1 July" }, { "spans": [ { "offset": 16055, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.8405, 6.7541, 3.8594, 6.3956, 3.9596, 6.4009, 3.9407, 6.7594 ] } ], "content": "28 May" }, { "spans": [ { "offset": 16062, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.8496, 6.0471, 3.8592, 5.7052, 3.95, 5.7077, 3.9404, 6.0497 ] } ], "content": "31 May" }, { "spans": [ { "offset": 16069, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.8496, 5.3062, 3.8544, 4.9417, 3.9452, 4.9429, 3.9404, 5.3074 ] } ], "content": "4 June" }, { "spans": [ { 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[ { "pageNumber": 24, "polygon": [ 4.1939, 6.0519, 4.1987, 5.6492, 4.2991, 5.6504, 4.2943, 6.0531 ] } ], "content": "11 July" }, { "spans": [ { "offset": 16188, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.1844, 5.355, 4.1988, 4.9487, 4.3039, 4.9524, 4.2895, 5.3588 ] } ], "content": "14 July" }, { "spans": [ { "offset": 16196, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.1939, 4.6513, 4.1987, 4.2533, 4.2991, 4.2545, 4.2943, 4.6525 ] } ], "content": "18 July" }, { "spans": [ { "offset": 16204, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.1843, 3.9536, 4.2034, 3.5518, 4.3039, 3.5566, 4.2847, 3.9583 ] } ], "content": "23 July" }, { "spans": [ { "offset": 16212, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.1845, 3.2605, 4.2037, 2.8494, 4.2991, 2.8539, 4.28, 3.265 ] } ], "content": "26 July" }, { "spans": [ { "offset": 16220, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.1844, 2.5636, 4.1988, 2.1477, 4.2991, 2.1511, 4.2847, 2.567 ] } ], "content": "29 July" }, { "spans": [ { "offset": 16228, "length": 1 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.1987, 8.6763, 4.1987, 8.6285, 4.2752, 8.6285, 4.2752, 8.6763 ] } ], "content": "4" }, { "spans": [ { "offset": 16230, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.1987, 8.117, 4.2035, 7.6953, 4.2991, 7.6963, 4.2943, 8.1181 ] } ], "content": "6 Sept." }, { "spans": [ { "offset": 16238, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.1987, 7.4573, 4.2035, 7.0261, 4.2943, 7.0271, 4.2895, 7.4583 ] } ], "content": "14 Oct." }, { "spans": [ { "offset": 16246, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.3039, 7.4573, 4.3182, 7.0462, 4.409, 7.0494, 4.3946, 7.4605 ] } ], "content": "24 Nov." }, { "spans": [ { "offset": 16254, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.2992, 6.7509, 4.3136, 6.3446, 4.4186, 6.3483, 4.4043, 6.7546 ] } ], "content": "31 July" }, { "spans": [ { "offset": 16262, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.3086, 6.0523, 4.3278, 5.6551, 4.4187, 5.6595, 4.3995, 6.0567 ] } ], "content": "12 Aug ." }, { "spans": [ { "offset": 16271, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.2991, 5.354, 4.3182, 4.9477, 4.4186, 4.9524, 4.3995, 5.3588 ] } ], "content": "15 July" }, { "spans": [ { "offset": 16279, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.3039, 4.656, 4.3278, 4.2536, 4.4234, 4.2593, 4.3995, 4.6617 ] } ], "content": "19 Aug ." }, { "spans": [ { "offset": 16288, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.2991, 3.9581, 4.323, 3.5512, 4.4139, 3.5566, 4.3899, 3.9635 ] } ], "content": "25 Aug ." }, { "spans": [ { "offset": 16297, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.3039, 3.2602, 4.3278, 2.863, 4.4139, 2.8682, 4.3899, 3.2654 ] } ], "content": "28 Aug ." }, { "spans": [ { "offset": 16306, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.3038, 2.5112, 4.3182, 2.1049, 4.4091, 2.1081, 4.3947, 2.5145 ] } ], "content": "2 Sept." }, { "spans": [ { "offset": 16314, "length": 1 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.3134, 8.6715, 4.3134, 8.6237, 4.3947, 8.6237, 4.3947, 8.6715 ] } ], "content": "5" }, { "spans": [ { "offset": 16316, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.3086, 8.158, 4.3182, 7.723, 4.4091, 7.725, 4.3995, 8.16 ] } ], "content": "15 Oct." }, { "spans": [ { "offset": 16324, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.4141, 6.7064, 4.4333, 6.3383, 4.5334, 6.3435, 4.5143, 6.7116 ] } ], "content": "1 Aug ." }, { "spans": [ { "offset": 16332, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.4234, 6.0581, 4.4378, 5.6551, 4.5335, 5.6585, 4.5191, 6.0615 ] } ], "content": "13 Aug." }, { "spans": [ { "offset": 16340, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.4188, 5.3648, 4.4331, 4.9537, 4.5334, 4.9572, 4.5191, 5.3683 ] } ], "content": "15 Aug." }, { "spans": [ { "offset": 16348, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.4234, 4.6576, 4.4377, 4.2513, 4.5286, 4.2545, 4.5143, 4.6608 ] } ], "content": "20 Aug ." }, { "spans": [ { "offset": 16357, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.4207, 3.9535, 4.4426, 3.5613, 4.5286, 3.5661, 4.5068, 3.9582 ] } ], "content": "26 Aug ." }, { "spans": [ { "offset": 16366, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.4186, 3.2555, 4.4378, 2.8634, 4.5334, 2.8681, 4.5143, 3.2602 ] } ], "content": "29 Aug ." }, { "spans": [ { "offset": 16375, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.4186, 2.5112, 4.433, 2.1129, 4.5239, 2.1162, 4.5095, 2.5145 ] } ], "content": "3 Sept." }, { "spans": [ { "offset": 16383, "length": 1 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.4304, 8.6669, 4.433, 8.6237, 4.5143, 8.6285, 4.5117, 8.6717 ] } ], "content": "6" }, { "spans": [ { "offset": 16385, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.5478, 6.7068, 4.5525, 6.3053, 4.6387, 6.3063, 4.6339, 6.7078 ] } ], "content": "6 Sept." }, { "spans": [ { "offset": 16393, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.5381, 6.0586, 4.5525, 5.6045, 4.6434, 5.6073, 4.6291, 6.0615 ] } ], "content": "17 Sept." }, { "spans": [ { "offset": 16402, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.5336, 5.359, 4.5527, 4.9527, 4.6482, 4.9572, 4.6291, 5.3635 ] } ], "content": "16 Aug." }, { "spans": [ { "offset": 16410, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.5334, 4.6626, 4.5477, 4.2037, 4.6434, 4.2067, 4.6291, 4.6656 ] } ], "content": "27 Sept." }, { "spans": [ { "offset": 16419, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.5334, 3.9163, 4.5477, 3.5674, 4.6338, 3.5709, 4.6195, 3.9199 ] } ], "content": "3 Oct." }, { "spans": [ { "offset": 16426, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.5381, 3.2042, 4.5525, 2.8648, 4.6338, 2.8682, 4.6195, 3.2076 ] } ], "content": "7 Oct." }, { "spans": [ { "offset": 16433, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.5286, 2.5059, 4.543, 2.1607, 4.6339, 2.1645, 4.6195, 2.5097 ] } ], "content": "9 Oct." }, { "spans": [ { "offset": 16440, "length": 1 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.543, 8.6715, 4.5454, 8.6331, 4.6243, 8.6381, 4.6219, 8.6765 ] } ], "content": "7" }, { "spans": [ { "offset": 16442, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.6435, 6.7033, 4.6579, 6.2969, 4.7582, 6.3005, 4.7438, 6.7068 ] } ], "content": "9 Sept." }, { "spans": [ { "offset": 16450, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.6577, 6.0567, 4.6625, 5.6015, 4.7582, 5.6026, 4.7534, 6.0577 ] } ], "content": "19 Sept." }, { "spans": [ { "offset": 16459, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.6577, 5.3588, 4.6625, 4.9046, 4.7534, 4.9056, 4.7486, 5.3597 ] } ], "content": "22 Sept." }, { "spans": [ { "offset": 16468, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.653, 4.6589, 4.6626, 4.2, 4.7534, 4.2019, 4.7438, 4.6608 ] } ], "content": "29 Sept." }, { "spans": [ { "offset": 16477, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.6482, 3.9055, 4.6627, 3.5576, 4.7534, 3.5613, 4.7389, 3.9093 ] } ], "content": "4 Oct." }, { "spans": [ { "offset": 16484, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.653, 3.2124, 4.6626, 2.8611, 4.7486, 2.8634, 4.739, 3.2147 ] } ], "content": "8 Oct." }, { "spans": [ { "offset": 16491, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.6529, 2.5659, 4.6577, 2.1703, 4.7486, 2.1714, 4.7438, 2.567 ] } ], "content": "10 Oct." }, { "spans": [ { "offset": 16499, "length": 1 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.6577, 8.6715, 4.6607, 8.6236, 4.739, 8.6285, 4.736, 8.6764 ] } ], "content": "8" }, { "spans": [ { "offset": 16501, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.7678, 6.762, 4.7773, 6.3652, 4.8682, 6.3674, 4.8586, 6.7642 ] } ], "content": "21 Oct." }, { "spans": [ { "offset": 16509, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.7725, 6.0567, 4.7725, 5.6647, 4.8634, 5.6647, 4.8634, 6.0567 ] } ], "content": "29 Oct." }, { "spans": [ { "offset": 16517, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.7725, 5.3569, 4.782, 4.9076, 4.8682, 4.9094, 4.8586, 5.3588 ] } ], "content": "23 Sept." }, { "spans": [ { "offset": 16526, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.7677, 4.6143, 4.782, 4.2606, 4.8682, 4.2641, 4.8538, 4.6178 ] } ], "content": "7 Nov." }, { "spans": [ { "offset": 16533, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.7677, 3.9549, 4.7821, 3.5661, 4.8682, 3.5693, 4.8538, 3.9581 ] } ], "content": "12 Nov." }, { "spans": [ { "offset": 16541, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.7677, 3.2602, 4.7773, 2.8613, 4.8634, 2.8634, 4.8538, 3.2623 ] } ], "content": "17 Nov." }, { "spans": [ { "offset": 16549, "length": 8 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.7677, 2.5575, 4.7773, 2.1559, 4.8633, 2.158, 4.8538, 2.5595 ] } ], "content": "18 Nov ." }, { "spans": [ { "offset": 16558, "length": 1 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.7821, 8.6811, 4.7821, 8.6237, 4.8634, 8.6237, 4.8634, 8.6811 ] } ], "content": "9" }, { "spans": [ { "offset": 16560, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.8729, 4.6056, 4.8824, 4.2567, 4.9781, 4.2593, 4.9686, 4.6082 ] } ], "content": "8 Nov." }, { "spans": [ { "offset": 16567, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.8778, 3.9607, 4.8873, 3.5639, 4.9781, 3.5661, 4.9686, 3.9629 ] } ], "content": "14 Nov." }, { "spans": [ { "offset": 16575, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.8921, 6.7594, 4.8921, 6.3626, 4.9781, 6.3626, 4.9781, 6.7594 ] } ], "content": "22 Oct." }, { "spans": [ { "offset": 16583, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.8824, 6.0545, 4.892, 5.653, 4.9829, 5.6551, 4.9734, 6.0567 ] } ], "content": "30 Oct." }, { "spans": [ { "offset": 16591, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.8824, 5.3037, 4.892, 4.9403, 4.9877, 4.9429, 4.9781, 5.3062 ] } ], "content": "3 Nov." }, { "spans": [ { "offset": 16598, "length": 2 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.8968, 8.7351, 4.9016, 8.6237, 4.9782, 8.627, 4.9734, 8.7385 ] } ], "content": "10" }, { "spans": [ { "offset": 16601, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 5.0068, 5.2966, 5.0116, 4.9656, 5.0929, 4.9668, 5.0881, 5.2978 ] } ], "content": "4 Nov." }, { "spans": [ { "offset": 16608, "length": 2 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 5.0116, 8.7385, 5.0116, 8.6333, 5.0881, 8.6333, 5.0881, 8.7385 ] } ], "content": "11" }, { "spans": [ { "offset": 16611, "length": 6 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.9691, 6.0184, 3.9739, 5.6349, 4.06, 5.636, 4.0552, 6.0195 ] } ], "content": "1 June" }, { "spans": [ { "offset": 16618, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.9643, 5.3577, 3.9691, 4.9514, 4.0552, 4.9524, 4.0504, 5.3588 ] } ], "content": "18 June" }, { "spans": [ { "offset": 16626, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.9643, 4.6465, 3.9643, 4.2449, 4.0552, 4.2449, 4.0552, 4.6465 ] } ], "content": "16 June" }, { "spans": [ { "offset": 16634, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.9595, 3.9608, 3.9691, 3.5422, 4.06, 3.5443, 4.0504, 3.9629 ] } ], "content": "23 June" }, { "spans": [ { "offset": 16642, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.9643, 3.2602, 3.9691, 2.8433, 4.06, 2.8443, 4.0552, 3.2612 ] } ], "content": "26 June" }, { "spans": [ { "offset": 16650, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 3.9596, 2.5623, 3.9692, 2.1396, 4.0552, 2.1416, 4.0456, 2.5642 ] } ], "content": "28 June" }, { "spans": [ { "offset": 16658, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.0743, 5.3624, 4.0791, 4.9418, 4.1748, 4.9429, 4.17, 5.3635 ] } ], "content": "19 June" }, { "spans": [ { "offset": 16666, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.0743, 4.6513, 4.0791, 4.2438, 4.1748, 4.2449, 4.17, 4.6524 ] } ], "content": "17 July" }, { "spans": [ { "offset": 16674, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.0743, 3.9581, 4.0791, 3.547, 4.1796, 3.5482, 4.1748, 3.9593 ] } ], "content": "22 July" }, { "spans": [ { "offset": 16682, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.0743, 3.258, 4.0839, 2.8491, 4.1748, 2.8512, 4.1652, 3.2602 ] } ], "content": "25 July" }, { "spans": [ { "offset": 16690, "length": 7 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.8778, 2.5649, 4.8873, 2.1633, 4.9781, 2.1655, 4.9686, 2.567 ] } ], "content": "19 Nov." }, { "spans": [ { "offset": 16698, "length": 2 } ], "boundingRegions": [ { "pageNumber": 24, "polygon": [ 4.2274, 9.9813, 4.2274, 9.8618, 4.3947, 9.8618, 4.3947, 9.9813 ] } ], "content": "18" }, { "spans": [ { "offset": 16701, "length": 87 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.2283, 1.3083, 6.2362, 1.3515, 6.2327, 1.6786, 2.2248, 1.6355 ] } ], "content": "Table 10. Shipboard and Laboratory Measurements in Connection with Limnological Studies" }, { "spans": [ { "offset": 16789, "length": 22 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.1564, 2.0751, 3.4455, 2.0751, 3.4455, 2.1805, 2.1564, 2.1805 ] } ], "content": "Shipboard Measurements" }, { "spans": [ { "offset": 16812, "length": 41 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.4439, 2.3099, 4.8256, 2.3195, 4.8251, 2.4298, 2.4435, 2.4202 ] } ], "content": "Meteorological data (printout each 6 min)" }, { "spans": [ { "offset": 16854, "length": 390 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.7231, 2.5495, 6.1831, 2.5573, 6.1805, 3.7158, 2.7206, 3.7081 ] } ], "content": "Wind speed (m/sec) (10 m above water) Wind direction (10 m above water) Barometric pressure (millibars) (3 m above water) Air temperature (C) (3 and 10 m above water) Water temperature (1.5 m below water surface) Solar radiation (incident) (gram-calories per sq. cm) (10 m above water) Solar radiation (reflected and incident) (3 m above water) Relative humidity (3 m above water) Dew point" }, { "spans": [ { "offset": 17245, "length": 10 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.4391, 3.8387, 3.0251, 3.8483, 3.0238, 3.9298, 2.4378, 3.9202 ] } ], "content": "On station" }, { "spans": [ { "offset": 17256, "length": 5 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.7171, 4.0735, 3.019, 4.0735, 3.019, 4.155, 2.7171, 4.155 ] } ], "content": "Water" }, { "spans": [ { "offset": 17262, "length": 281 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 3.002, 4.1811, 5.8674, 4.187, 5.865, 5.3494, 2.9996, 5.3435 ] } ], "content": "Water temperature ( \u2103) Reversing thermometers at sample depth Electronic bathythermograph Air-water interface temperatures Transparency (relative to 100% in air) Secchi disc (m) PH Eh (volts) Total and phenolphthalein alkalinity (mg/1 CaCO2) Specific conductance (micromhos at 25\u2103)" }, { "spans": [ { "offset": 17544, "length": 79 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 3.0047, 5.3501, 5.388, 5.3693, 5.3862, 5.5927, 3.0029, 5.5735 ] } ], "content": "Dissolved oxygen (mg/1 and pct. sat.) Coliform bacteria (membrane filter proc.)" }, { "spans": [ { "offset": 17624, "length": 53 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.7075, 5.5975, 4.3436, 5.6239, 4.3366, 6.0599, 2.7005, 6.0335 ] } ], "content": "Waves Height (m) Period (sec) Direction (nearest 10\u00b0)" }, { "spans": [ { "offset": 17678, "length": 44 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.7171, 6.0624, 4.272, 6.0793, 4.2673, 6.5063, 2.7124, 6.4894 ] } ], "content": "Bottom sediment Description (physical) PH Eh" }, { "spans": [ { "offset": 17723, "length": 20 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.1325, 6.6423, 3.2977, 6.6518, 3.2969, 6.7477, 2.1317, 6.7381 ] } ], "content": "Chemistry Laboratory" }, { "spans": [ { "offset": 17744, "length": 14 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.4152, 6.8723, 3.2399, 6.8771, 3.2394, 6.9681, 2.4147, 6.9633 ] } ], "content": "Dissolved ions" }, { "spans": [ { "offset": 17759, "length": 11 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.7227, 7.0097, 3.3063, 7.0691, 3.2872, 7.2567, 2.7036, 7.1973 ] } ], "content": "1 Nitrate 1" }, { "spans": [ { "offset": 17771, "length": 135 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.7033, 7.1027, 6.1349, 7.1199, 6.133, 7.5036, 2.7014, 7.4864 ] } ], "content": "(Brucine method, A.P.H.A. - , 1965) 3 Phosphate (Ammonium molybdate method, U. S.G.S. 1965) Sulfate (Turbidimetric method, A. P.H.A.\" 3" }, { "spans": [ { "offset": 17907, "length": 55 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.7042, 7.4619, 5.9005, 7.3471, 5.9089, 7.581, 2.7126, 7.6957 ] } ], "content": "4 1965) Silica (Molybdate blue method, U.S.G.S. , 1960)" }, { "spans": [ { "offset": 17963, "length": 51 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.6884, 7.5765, 5.7894, 7.5941, 5.7888, 7.7062, 2.6877, 7.6886 ] } ], "content": "Magnesium (Atomic absorption tech. , P. E. ,, 1971)" }, { "spans": [ { "offset": 18015, "length": 50 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.7032, 7.6966, 5.7846, 7.7135, 5.7838, 7.8503, 2.7025, 7.8333 ] } ], "content": "Calcium 4 (Atomic absorption tech., P. E. ,, 1971)" }, { "spans": [ { "offset": 18066, "length": 45 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.7027, 7.8078, 5.7797, 7.8212, 5.7792, 7.9314, 2.7023, 7.918 ] } ], "content": "Sodium (Atomic absorption tech., P.E. , 1971)" }, { "spans": [ { "offset": 18112, "length": 1 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 3.2298, 7.8643, 3.2925, 7.8678, 3.2873, 7.9602, 3.2247, 7.9567 ] } ], "content": "4" }, { "spans": [ { "offset": 18114, "length": 75 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.6979, 7.9314, 5.7792, 7.9314, 5.7792, 8.1758, 2.6979, 8.1758 ] } ], "content": "Potassium (Atomic absorption tech., P.E. , 1971) Chloride (AgNO2 titration)" }, { "spans": [ { "offset": 18190, "length": 25 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.4104, 8.2812, 3.8576, 8.2812, 3.8576, 8.3963, 2.4104, 8.3963 ] } ], "content": "Suspended sediment (mg/1)" }, { "spans": [ { "offset": 18216, "length": 33 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.1277, 8.7028, 3.9776, 8.7126, 3.9768, 8.8612, 2.1269, 8.8513 ] } ], "content": "1 Beckman DU-2 Spectrophotometer." }, { "spans": [ { "offset": 18250, "length": 147 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 2.1198, 8.8079, 5.0207, 8.8328, 5.0162, 9.3503, 2.1154, 9.3254 ] } ], "content": "2 American Public Health Association. 3 U.S. Geological Survey. 4 Perkin-Elmer Atomic Absorption Spectrophotometer. 5 The Perkin-Elmer Corporation." }, { "spans": [ { "offset": 18398, "length": 2 } ], "boundingRegions": [ { "pageNumber": 25, "polygon": [ 4.0588, 9.9011, 4.217, 9.9011, 4.217, 10.0161, 4.0588, 10.0161 ] } ], "content": "19" }, { "spans": [ { "offset": 18401, "length": 667 } ], "boundingRegions": [ { "pageNumber": 26, "polygon": [ 1.1505, 1.1466, 7.2106, 1.1354, 7.2137, 2.7936, 1.1535, 2.8048 ] } ], "content": "Water temperatures were recorded at the sampling depths to the nearest hundredth degree Celsius by protected reversing thermometers (+0.02\u00b0 accuracy) attached to each Niskin bottle. The temperature of the water circulating through the sea chest, approximately 1.5 m below the surface, was recorded to the nearest tenth degree Celsius and printed with the meteorological data at 6-min intervals. Temperature profiles were recorded at each station with a Guildline Electronic Bathythermo- graph, Model 1800. The bathythermograph profiles were corrected by adding or subtracting the average difference between the reversing thermometer and bathythermograph temperatures." }, { "spans": [ { "offset": 19069, "length": 350 } ], "boundingRegions": [ { "pageNumber": 26, "polygon": [ 1.1595, 2.9894, 7.1349, 2.9797, 7.1362, 3.7859, 1.1609, 3.7956 ] } ], "content": "Transparency measurements were made with a G.M. Mfg. and Instrument Corp. Deep-Water Turbidity Meter, Model 17-M-11, modified by the U.S. Lake Survey. Transparency was determined by relating light transmission along a 1-m path through the water to the transmission along the same path through air, expressed as a percent. Color filters were not used." }, { "spans": [ { "offset": 19420, "length": 404 } ], "boundingRegions": [ { "pageNumber": 26, "polygon": [ 1.1695, 3.9822, 7.1349, 3.9764, 7.1359, 4.9643, 1.1705, 4.9701 ] } ], "content": "Suspended materials were determined in the field by filtering 1 to 2 liters of water through Whatman 40 and 0.45 micron Millipore filters at standard depths at the mouths of selected rivers and harbors. Approximately 475 ml of all water samples were passed through Whatman-40 filters after analyzing for nitrate and phosphate and the weight of suspended materials was reported with the limnological data." }, { "spans": [ { "offset": 19825, "length": 400 } ], "boundingRegions": [ { "pageNumber": 26, "polygon": [ 1.1682, 5.1571, 7.1484, 5.1452, 7.1504, 6.1183, 1.1701, 6.1302 ] } ], "content": "Meteorological observations were recorded automatically at 0.1-hr intervals by a digital system employing solid state data gathering modules. Wind and wave observations were made while on station. The wave direction was not reported at all stations and in such cases the wind direction was used. Wave height observations are estimations. The period is based on an average time of 10 successive waves." }, { "spans": [ { "offset": 20226, "length": 21 } ], "boundingRegions": [ { "pageNumber": 26, "polygon": [ 3.5056, 6.4835, 5.2544, 6.4931, 5.2537, 6.6267, 3.5049, 6.6172 ] } ], "content": "2.2 Chemical Analyses" }, { "spans": [ { "offset": 20248, "length": 224 } ], "boundingRegions": [ { "pageNumber": 26, "polygon": [ 1.183, 6.8238, 7.0627, 6.8057, 7.0647, 7.4585, 1.185, 7.4766 ] } ], "content": "The methods used in the water analysis are those described in Standard Methods (American Public Health Association, 1965), Rainwater and Thatcher (1960), Fishman and Skougstad (1965), and the Perkin-Elmer Corporation (1971)." }, { "spans": [ { "offset": 20473, "length": 273 } ], "boundingRegions": [ { "pageNumber": 26, "polygon": [ 1.1929, 7.6635, 7.1635, 7.653, 7.1646, 8.2964, 1.194, 8.3068 ] } ], "content": "Water samples were analyzed immediately in the Shenehon laboratory for dissolved oxygen, specific conductance, phenolphthalein and total alkalinity, pH, Eh (oxidation-reduction potential), the pH and Eh of the interstitial water of the bottom sediment, and total coliforms." }, { "spans": [ { "offset": 20747, "length": 348 } ], "boundingRegions": [ { "pageNumber": 26, "polygon": [ 1.1914, 8.5042, 7.0824, 8.4883, 7.0851, 9.4672, 1.194, 9.4831 ] } ], "content": "Dissolved oxygen values were determined with a Beckman Dissolved Oxygen Analyzer, Model 777. After two separate tests were made on each sample, the highest partial pressure and the lowest sample temperature readings were used for calculating the dissolved oxygen. In situ temperature was recorded by the reversing thermometer at the sampling depth." }, { "spans": [ { "offset": 21096, "length": 2 } ], "boundingRegions": [ { "pageNumber": 26, "polygon": [ 4.1982, 9.9019, 4.3701, 9.9019, 4.3701, 10.0213, 4.1982, 10.0213 ] } ], "content": "20" }, { "spans": [ { "offset": 21099, "length": 189 } ], "boundingRegions": [ { "pageNumber": 27, "polygon": [ 1.0881, 1.0539, 7.0011, 1.0602, 7.0006, 1.5543, 1.0876, 1.5479 ] } ], "content": "Specific conductance was measured with an Industrial Instruments Conductivity Bridge, Model RC-19. Two separate tests were made on each sample and the average expressed in micromhos at 25\u2103." }, { "spans": [ { "offset": 21289, "length": 278 } ], "boundingRegions": [ { "pageNumber": 27, "polygon": [ 1.0706, 1.7271, 7.1417, 1.7511, 7.1392, 2.3962, 1.068, 2.3722 ] } ], "content": "Phenolphthalein and total alkalinity values were determined by titrating 100-ml water samples with standard acid (H SO, ) to the end- points of pH 8.2 and 4.5, respectively. The end-points were determined with the pH meter and the results expressed in mg/1 of calcium carbonate." }, { "spans": [ { "offset": 21568, "length": 453 } ], "boundingRegions": [ { "pageNumber": 27, "polygon": [ 1.0647, 2.5664, 7.2181, 2.6011, 7.2116, 3.7415, 1.0583, 3.7068 ] } ], "content": "Measurements of pH and Eh were made with a Beckman Digital pH Meter, a glass pH electrode, a calomel fiber junction reference electrode, and a platinum Eh electrode. As a means of avoiding contamination, the electrodes were rinsed in a sample of the lake water to be tested. Between tests, the electrodes were immersed in distilled water. Tests of the interstitial water of the bottom sediment were made by inserting the electrodes into the soft sample." }, { "spans": [ { "offset": 22022, "length": 241 } ], "boundingRegions": [ { "pageNumber": 27, "polygon": [ 1.069, 3.8999, 6.9101, 3.9154, 6.9084, 4.5655, 1.0673, 4.5501 ] } ], "content": "Water samples to be analyzed later were preserved with chloroform and stored in 500-ml plastic bottles in a dark area below deck. These samples were transferred at the end of each cruise or survey period to the GLERL laboratory in Ann Arbor." }, { "spans": [ { "offset": 22264, "length": 1011 } ], "boundingRegions": [ { "pageNumber": 27, "polygon": [ 1.0499, 4.7432, 7.0663, 4.7605, 7.0592, 7.2497, 1.0427, 7.2324 ] } ], "content": "Chloride concentrations were determined by the argentometric method and titration of a 100-ml sample of lake water. The silver nitrate was standardized and the reagent blank value determined at the beginning of each day of testing. A Beckman DU-2 Spectrophotometer with flame attachment was used for analysis of nitrate, phosphate, sulfate, and silica, and a Perkin-Elmer Atomic Absorption Spectrophotometer was used for calcium, magnesium, sodium and potassium. Standard curves were constructed for each test and cruise. Tests for nitrate and phosphate were made on unfiltered samples upon arrival at the laboratory. Sample anion concentrations were determined by computer application of the absorbancy values to a standard curve that was adjusted by paired test standards run after each set of 10 to 20 samples in order to compensate for any change or drift in the spectrophotometer response. The cation concentrations were also adjusted by paired test standards and read directly from a recorder strip chart." }, { "spans": [ { "offset": 23276, "length": 173 } ], "boundingRegions": [ { "pageNumber": 27, "polygon": [ 1.0498, 7.4223, 7.0543, 7.438, 7.053, 7.9205, 1.0486, 7.9049 ] } ], "content": "The bottom sediment samples were described, analyzed for pH and Eh of the intersititial water, and then treated with concentrated sulphuric acid. No further tests were made." }, { "spans": [ { "offset": 23450, "length": 19 } ], "boundingRegions": [ { "pageNumber": 27, "polygon": [ 3.3743, 8.0752, 5.0697, 8.0848, 5.0687, 8.2477, 3.3734, 8.2381 ] } ], "content": "3. PRECISION LIMITS" }, { "spans": [ { "offset": 23470, "length": 624 } ], "boundingRegions": [ { "pageNumber": 27, "polygon": [ 1.045, 8.4208, 7.0547, 8.4356, 7.051, 9.935, 1.0413, 9.9202 ] } ], "content": "The degrees of precision shown in Table 11 were determined for nitrate, phosphate, sulfate, and silica by a computer comparison of pairs of test standards to the standard curve that was used to determine the sample concentrations. A pair of test standards was run after each set of 10 samples for nitrate and after each set of 20 samples for phosphate, sulfate, and silica. Calcium, magnesium, sodium, and potas- sium analyses were run in sets of 10 samples followed by one standard and at least one additional standard bracketing the concentration range after each 20 samples. For both chloride and alkalinity the estimated" }, { "spans": [ { "offset": 24095, "length": 2 } ], "boundingRegions": [ { "pageNumber": 27, "polygon": [ 4.0394, 10.0448, 4.2024, 10.0448, 4.2024, 10.1647, 4.0394, 10.1647 ] } ], "content": "21" }, { "spans": [ { "offset": 24098, "length": 31 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7747, 2.1437, 5.4301, 2.1437, 5.4301, 2.2964, 2.7747, 2.2964 ] } ], "content": "Table 11. Measurement Precision" }, { "spans": [ { "offset": 24130, "length": 8 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1215, 2.9171, 1.7957, 2.9123, 1.7965, 3.0317, 1.1223, 3.0365 ] } ], "content": "Variable" }, { "spans": [ { "offset": 24139, "length": 5 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.8607, 2.9123, 3.287, 2.9171, 3.2858, 3.0317, 2.8594, 3.0269 ] } ], "content": "Units" }, { "spans": [ { "offset": 24145, "length": 19 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.5013, 2.7359, 5.2702, 2.7263, 5.2741, 3.0412, 4.5052, 3.0508 ] } ], "content": "Estimated precision" }, { "spans": [ { "offset": 24165, "length": 18 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 5.8421, 2.7223, 6.6875, 2.7128, 6.6909, 3.0174, 5.8456, 3.0269 ] } ], "content": "Average deviation*" }, { "spans": [ { "offset": 24184, "length": 12 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1203, 3.4947, 2.0468, 3.4804, 2.0488, 3.6094, 1.1223, 3.6237 ] } ], "content": "Nitrate-N **" }, { "spans": [ { "offset": 24197, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7482, 3.4804, 3.1186, 3.4852, 3.1165, 3.6476, 2.7461, 3.6428 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24202, "length": 6 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 5.9411, 3.49, 6.4282, 3.49, 6.4282, 3.6142, 5.9411, 3.6141 ] } ], "content": "\u00b10.004" }, { "spans": [ { "offset": 24209, "length": 14 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1271, 3.6714, 2.2129, 3.6475, 2.216, 3.786, 1.1301, 3.8099 ] } ], "content": "Phosphate-P **" }, { "spans": [ { "offset": 24224, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7604, 3.6523, 3.1281, 3.6523, 3.1281, 3.8051, 2.7604, 3.8051 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24229, "length": 7 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 5.9315, 3.6571, 6.5285, 3.6571, 6.5285, 3.7765, 5.9315, 3.7765 ] } ], "content": "+0.0003" }, { "spans": [ { "offset": 24237, "length": 7 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1271, 3.8338, 1.7145, 3.8338, 1.7145, 3.9531, 1.1271, 3.9531 ] } ], "content": "Sulfate" }, { "spans": [ { "offset": 24245, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7604, 3.8194, 3.1234, 3.8194, 3.1234, 3.977, 2.7604, 3.977 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24250, "length": 5 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 5.9397, 3.829, 6.347, 3.8242, 6.3484, 3.9388, 5.9411, 3.9436 ] } ], "content": "\u00b10.14" }, { "spans": [ { "offset": 24256, "length": 6 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1366, 4.0009, 1.6344, 4.0057, 1.6333, 4.1155, 1.1356, 4.1107 ] } ], "content": "Silica" }, { "spans": [ { "offset": 24263, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7604, 3.9865, 3.1281, 3.9865, 3.1281, 4.1441, 2.7604, 4.1441 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24268, "length": 5 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 5.9363, 3.9961, 6.347, 3.9913, 6.3484, 4.1107, 5.9377, 4.1155 ] } ], "content": "\u00b10.01" }, { "spans": [ { "offset": 24274, "length": 7 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1366, 4.1727, 1.7241, 4.1727, 1.7241, 4.2921, 1.1366, 4.2921 ] } ], "content": "Calcium" }, { "spans": [ { "offset": 24282, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7633, 4.1632, 3.1215, 4.1584, 3.1234, 4.2969, 2.7652, 4.3016 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24287, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.6946, 4.1632, 5.0241, 4.1632, 5.0241, 4.2826, 4.6946, 4.2826 ] } ], "content": "\u00b10.5" }, { "spans": [ { "offset": 24292, "length": 9 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1223, 4.3398, 1.8912, 4.3398, 1.8912, 4.4735, 1.1223, 4.4735 ] } ], "content": "Magnesium" }, { "spans": [ { "offset": 24302, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7651, 4.3383, 3.1234, 4.3255, 3.1285, 4.4686, 2.7702, 4.4814 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24307, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.6946, 4.3398, 5.0241, 4.3398, 5.0241, 4.4497, 4.6946, 4.4497 ] } ], "content": "\u00b10.1" }, { "spans": [ { "offset": 24312, "length": 6 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1366, 4.5022, 1.6381, 4.5022, 1.6381, 4.6215, 1.1366, 4.6215 ] } ], "content": "Sodium" }, { "spans": [ { "offset": 24319, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7794, 4.5001, 3.1234, 4.4878, 3.1285, 4.6309, 2.7846, 4.6432 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24324, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.6946, 4.4974, 5.0337, 4.4974, 5.0337, 4.612, 4.6946, 4.612 ] } ], "content": "\u00b10.5" }, { "spans": [ { "offset": 24329, "length": 9 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1366, 4.6693, 1.8912, 4.6693, 1.8912, 4.7839, 1.1366, 4.7839 ] } ], "content": "Potassium" }, { "spans": [ { "offset": 24339, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7697, 4.6599, 3.1281, 4.6483, 3.1332, 4.8057, 2.7747, 4.8173 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24344, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.6994, 4.6645, 5.0289, 4.6645, 5.0289, 4.7791, 4.6994, 4.7791 ] } ], "content": "\u00b10.1" }, { "spans": [ { "offset": 24349, "length": 8 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1366, 4.8364, 1.8053, 4.8364, 1.8053, 4.951, 1.1366, 4.951 ] } ], "content": "Chloride" }, { "spans": [ { "offset": 24358, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7794, 4.8343, 3.1234, 4.822, 3.1285, 4.9651, 2.7846, 4.9774 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24363, "length": 5 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.6946, 4.8316, 5.1101, 4.8316, 5.1101, 4.951, 4.6946, 4.951 ] } ], "content": "\u00b10.25" }, { "spans": [ { "offset": 24369, "length": 8 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1319, 5.0035, 1.8005, 5.0035, 1.8005, 5.1372, 1.1319, 5.1372 ] } ], "content": "Specific" }, { "spans": [ { "offset": 24378, "length": 11 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.3086, 5.1753, 2.2207, 5.1753, 2.2207, 5.2899, 1.3086, 5.2899 ] } ], "content": "conductance" }, { "spans": [ { "offset": 24390, "length": 16 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7838, 5.161, 4.217, 5.1563, 4.2175, 5.2899, 2.7843, 5.2947 ] } ], "content": "micromhos at 25\u2103" }, { "spans": [ { "offset": 24407, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 5.9363, 5.161, 6.2802, 5.161, 6.2802, 5.2804, 5.9363, 5.2804 ] } ], "content": "\u00b11.0" }, { "spans": [ { "offset": 24412, "length": 16 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1366, 5.3329, 2.4739, 5.3329, 2.4739, 5.4714, 1.1366, 5.4714 ] } ], "content": "Total alkalinity" }, { "spans": [ { "offset": 24429, "length": 10 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7698, 5.3109, 3.6057, 5.3329, 3.601, 5.5143, 2.765, 5.4923 ] } ], "content": "mg/1 CaCO3" }, { "spans": [ { "offset": 24440, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.6994, 5.3377, 5.0337, 5.3377, 5.0337, 5.4475, 4.6994, 5.4475 ] } ], "content": "\u00b10.5" }, { "spans": [ { "offset": 24445, "length": 16 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1414, 5.5048, 2.4791, 5.5095, 2.4786, 5.648, 1.1409, 5.6432 ] } ], "content": "Dissolved oxygen" }, { "spans": [ { "offset": 24462, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7747, 5.5, 3.1377, 5.5, 3.1377, 5.6385, 2.7747, 5.6385 ] } ], "content": "mg/1" }, { "spans": [ { "offset": 24467, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.7042, 5.5048, 5.0385, 5.5048, 5.0385, 5.6146, 4.7042, 5.6146 ] } ], "content": "\u00b10.1" }, { "spans": [ { "offset": 24472, "length": 16 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1366, 5.6671, 2.4796, 5.6767, 2.4786, 5.8151, 1.1357, 5.8056 ] } ], "content": "Dissolved oxygen" }, { "spans": [ { "offset": 24489, "length": 12 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 2.7843, 5.6623, 3.7735, 5.6671, 3.7729, 5.7912, 2.7837, 5.7865 ] } ], "content": "Percent sat." }, { "spans": [ { "offset": 24502, "length": 4 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.6994, 5.6623, 5.0528, 5.6623, 5.0528, 5.7769, 4.6994, 5.7769 ] } ], "content": "\u00b11.0" }, { "spans": [ { "offset": 24507, "length": 73 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1414, 6.0777, 6.6097, 6.0777, 6.6097, 6.3737, 1.1414, 6.3737 ] } ], "content": "*Average of the deviations of the test standards from the standard curve." }, { "spans": [ { "offset": 24581, "length": 100 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 1.1462, 6.4023, 6.2897, 6.4023, 6.2897, 6.7174, 1.1462, 6.7174 ] } ], "content": "** Analysis of unfiltered samples which were CHCI, poisoned and stored for variable lengths of time." }, { "spans": [ { "offset": 24682, "length": 2 } ], "boundingRegions": [ { "pageNumber": 28, "polygon": [ 4.1502, 9.9353, 4.3173, 9.9353, 4.3173, 10.0499, 4.1502, 10.0499 ] } ], "content": "22" }, { "spans": [ { "offset": 24685, "length": 652 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 1.0397, 1.0434, 7.0521, 1.073, 7.044, 2.7198, 1.0316, 2.6902 ] } ], "content": "precision is based on the change in concentration produced by one drop (0.05 ml) of titrant and on the assumption that the end-point was within t one drop. Two readings were made on each sample for specific conduc- tance, and deviations from the mean of each pair were used to compute the average deviation. Of the 105 sample pairs randomly selected, 99 percent were within 1 micromho of the mean. The estimated precision of the dissolved oxygen determinations is based on the assumption that the partial pressure is accurate to 1 mm of mercury. The average difference in the two partial pressure readings for each sample was less than 1 mm of mercury." }, { "spans": [ { "offset": 25338, "length": 444 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 1.0374, 2.8887, 7.0359, 2.9211, 7.0297, 4.0595, 1.0313, 4.0271 ] } ], "content": "Tests for nitrate and phosphate were made on unfiltered samples. From the end of a cruise at a given harbor to the date of analysis, there was an interval of from 1 to 14 days for phosphate and from 2 to 15 days for nitrate. Some of the lake water samples were not analyzed until the end of a given cruise, with delays ranging up to 30 days in some cases. The Grand Haven samples were processed within an average of 3 days following collection." }, { "spans": [ { "offset": 25783, "length": 20 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 3.3613, 4.3876, 5.1275, 4.4035, 5.1264, 4.5327, 3.3601, 4.5168 ] } ], "content": "4. DATA PRESENTATION" }, { "spans": [ { "offset": 25804, "length": 287 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 1.0195, 4.7098, 7.0266, 4.7098, 7.0266, 5.5091, 1.0195, 5.5091 ] } ], "content": "The limnological data are summarized by cruise for each sampling depth at a given station (Appendix A). Nitrogen concentrations were calculated from nitrate by multiplying by a factor of 0.226. Phosphorus concentrations were calculated from phosphate by multiplying by a factor of 0.326." }, { "spans": [ { "offset": 26092, "length": 83 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 1.0152, 5.7233, 6.5288, 5.7385, 6.528, 6.046, 1.0144, 6.0308 ] } ], "content": "The wind direction and wave data are summarized by cruise and station (Appendix B)." }, { "spans": [ { "offset": 26176, "length": 207 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 1.0156, 6.225, 6.9141, 6.2537, 6.9117, 6.7296, 1.0132, 6.7009 ] } ], "content": "In the statistical summary, lake wide means, standard deviations, and sample sizes are presented by depth and cruise period for selected variables in Lake Michigan (Appendix C). The harbors are not included." }, { "spans": [ { "offset": 26384, "length": 18 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 3.4176, 7.2171, 5.0264, 7.2226, 5.0258, 7.3949, 3.417, 7.3894 ] } ], "content": "5. ACKNOWLEDGMENTS" }, { "spans": [ { "offset": 26403, "length": 298 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 1.0058, 7.561, 7.0953, 7.5818, 7.0925, 8.3969, 1.003, 8.3761 ] } ], "content": "The task scientist responsibilities were shared by R. L. Chambers, who formulated and directed the sediment phase of the program. Ship services were provided by the Lake Survey Facilities Division of National Ocean Survey, NOAA. Shenehon operations were under the direction of Lt. (jg.) F. Arbusto." }, { "spans": [ { "offset": 26702, "length": 537 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 0.9926, 8.5717, 7.2574, 8.5812, 7.2554, 9.9029, 0.9906, 9.8934 ] } ], "content": "I wish to thank the GLERL Computer Systems Group for computer operations, programming assistance, and keypunching; Party Chief P. H. Hendershot and staff for field operations and sample collection; J. M. Malczyk, A. L. Langston, and staff for laboratory analyses; J. L. Grumblatt for meteorological data reduction; W. R. Lee and D. Landay of the GLERL Chemistry-Biology Group for assistance in data reduction; and A. Robertson and B. J. Eadie for review and suggestions. Final programming was by V. Maxey, J. Boyd, and J. Manor of GLERL." }, { "spans": [ { "offset": 27240, "length": 2 } ], "boundingRegions": [ { "pageNumber": 29, "polygon": [ 4.0781, 9.9796, 4.2552, 9.9796, 4.2552, 10.104, 4.0781, 10.104 ] } ], "content": "23" }, { "spans": [ { "offset": 27243, "length": 13 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 3.7507, 1.3481, 4.9228, 1.3481, 4.9228, 1.4628, 3.7507, 1.4628 ] } ], "content": "6. REFERENCES" }, { "spans": [ { "offset": 27257, "length": 167 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 1.1709, 1.6922, 6.841, 1.6403, 6.8456, 2.1399, 1.1754, 2.1919 ] } ], "content": "American Public Health Association (1965) : Standard Methods for the Examination of Water and Wastewater, 12th ed. American Public Health Association, Washington, D.C." }, { "spans": [ { "offset": 27425, "length": 265 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 1.1812, 2.3326, 7.1708, 2.3169, 7.1725, 2.9922, 1.183, 3.0079 ] } ], "content": "Bell, G. L., and R. L. Chambers (1976) : Aspects of the chemical- physical variability of the nearshore and open-lake environments in southern Lake Michigan. Abstract, Nineteenth Conference on Great Lakes Research, University of Guelph, Guelph, Ontario, 5 May 1976." }, { "spans": [ { "offset": 27691, "length": 238 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 1.2003, 3.1933, 7.0947, 3.1741, 7.0969, 3.8268, 1.2024, 3.8459 ] } ], "content": "Fishman, M. J., and M. W. Skougstad (1965) : Rapid field and laboratory determination of phosphate in natural water, U.S. Geological Survey Professional Paper 525-B, pp. B167-B169, U. S. Government Printing Office, Washington, D.C. 20402." }, { "spans": [ { "offset": 27930, "length": 190 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 1.2004, 4.0243, 6.9368, 4.0066, 6.9383, 4.4866, 1.2018, 4.5043 ] } ], "content": "Great Lakes Environmental Research Laboratory (1975) : Technical plan for the Great Lakes Environmental Research Laboratory. National Oceanic and Atmospheric Administration, Ann Arbor, Mich." }, { "spans": [ { "offset": 28121, "length": 143 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 1.2097, 4.6847, 7.4145, 4.6581, 7.4165, 5.1349, 1.2118, 5.1615 ] } ], "content": "The Perkin-Elmer Corporation (1970) . Analytical Methods for Atomic Absorption Spectrophotometry. The Perkin-Elmer Corporation, Hartford, Conn." }, { "spans": [ { "offset": 28265, "length": 177 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 1.2003, 5.354, 7.0464, 5.3348, 7.048, 5.8286, 1.2019, 5.8477 ] } ], "content": "Pinsak, A. P. (Ed.) (1975): Proceedings of Workshop on Priority Great Lakes Environmental Research Initiatives. National Oceanic and Atmospheric Administration, Ann Arbor, Mich." }, { "spans": [ { "offset": 28443, "length": 204 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 1.2046, 6.0266, 7.2792, 5.9906, 7.2822, 6.4869, 1.2075, 6.5228 ] } ], "content": "Rainwater, F. H., and L. L. Thatcher (1960) : Methods for collection and analysis of water samples, U.S. Geological Survey Water-Supply Paper 1454, U.S. Government Printing Office, Washington, D.C. 20402." }, { "spans": [ { "offset": 28648, "length": 50 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 4.889, 9.9622, 7.4583, 9.9527, 7.4586, 10.0387, 4.8893, 10.0483 ] } ], "content": "*U.S. GOVERNMENT PRINTING OFFICE: 1980-677-403/259" }, { "spans": [ { "offset": 28699, "length": 2 } ], "boundingRegions": [ { "pageNumber": 30, "polygon": [ 4.2339, 9.9288, 4.4109, 9.9288, 4.4109, 10.0435, 4.2339, 10.0435 ] } ], "content": "24" }, { "spans": [ { "offset": 28702, "length": 43 } ], "boundingRegions": [ { "pageNumber": 31, "polygon": [ 6.278, 0.4258, 7.7413, 0.5166, 7.7084, 1.0469, 6.2451, 0.9561 ] } ], "content": "GLERL LIBRARY - Ann Arbor 5 0778 01005771 9" }, { "spans": [ { "offset": 28746, "length": 85 } ], "boundingRegions": [ { "pageNumber": 32, "polygon": [ 2.587, 5.7415, 4.6881, 5.5969, 4.7337, 6.2591, 2.6325, 6.4037 ] } ], "content": "QC 802 .U6 G5 no. 13 c.1 Bell, Gerald L. 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