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Long-term observations of Alaska Coastal Current in the northern Gulf of Alaska
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Long-term observations of Alaska Coastal Current in the northern Gulf of Alaska
Details:
  • Personal Author:
  • Description:
    The Alaska Coastal Current is a continuous, well-defined system extending for 1700 km along the coast of Alaska from Seward, Alaska to Samalga Pass in the Aleutian Islands. The currents in this region are examined using data-collected at > 20 mooring sites and from > 400 satellite-tracked drifters. While not continuous, the mooring data span a 30 year period (1984-2014). Using current meter data collected at a dozen mooring sites spread over four lines (Seward, Gore Point, Kennedy and Stevenson Entrances, and the exit to Shelikof Strait) total transport was calculated. Transport was significantly correlated with alongshore winds, although the correlation at the Seward Line was weak. The largest mean transport in the Alaska Coastal Current occurred at Gore Point (1.4 x 10(6) m(3) s(-1) in winter and 0.6 x 10(6) m(3) S-1 in summer), with the transport at the exit to Shelikof Strait (1.3 x 10(6) m(3) s(-1) in winter and 0.6 x 10(6) m(3) S-1 in summer) only slightly less. The transport was modified at the Seward Line in late summer and fall by frontal undulations associated with strong river discharge that enters onto the shelf at that time of year. The interaction of the Alaska Coastal Current and tidal currents with shallow banks in the vicinity of Kodiak Archipeligo and in Kennedy-Stevenson Entrance results in mixing and prolonged primary production throughout the summer. (C) 2016 Published by Elsevier Ltd.

  • Document Type:
    Journal Article
  • Funding:
    Grant No: NA17RJ1232
  • Collection(s):
    Office of Oceanic and Atmospheric Research (OAR)
    NOAA Cooperative Institutes
  • Main Document Checksum:
  • Supporting Files:
    No Additional Files
    1. Calculating surface ocean pCO(2) from biogeochemical Argo floats equipped with pH: An uncertainty analysis
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      Williams, N. L.; Juranek, L. W.; Feely, R. A.; Johnson, K. S.; Sarmiento, J. L.; Talley, L. D.; Dickson, A. G.; Gray, A. R.; Wanninkhof, R.; Russell, J. L.; Riser, S. C.; Takeshita, Y.;
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      2017
      Source:
      Global Biogeochemical Cycles, 31(3), 591-604.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
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      More than 74 biogeochemical profiling floats that measure water column pH, oxygen, nitrate, fluorescence, and backscattering at 10 day intervals have been deployed throughout the Southern Ocean. Calculating the surface ocean partial pressure of carbo...
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    2. Empirical algorithms to estimate water column pH in the Southern Ocean
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      Williams, N. L.; Juranek, L. W.; Johnson, K. S.; Feely, R. A.; Riser, S. C.; Talley, L. D.; Russell, J. L.; Sarmiento, J. L.; Wanninkhof, R.;
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      2016
      Source:
      Geophysical Research Letters, 43(7), 3415-3422.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Empirical algorithms are developed using high-quality GO-SHIP hydrographic measurements of commonly measured parameters (temperature, salinity, pressure, nitrate, and oxygen) that estimate pH in the Pacific sector of the Southern Ocean. The coefficie...
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      Filetype[PDF - 674.01 KB]
    3. Gap winds and their effects on regional oceanography Part II: Kodiak Island, Alaska
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      Ladd, C.; Cheng, W.; Salo, S.;
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      2016
      Source:
      Deep-Sea Research Part Ii-Topical Studies in Oceanography, 132, 54-67.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
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      2016
      Source:
      Frontiers in Microbiology, 7, 12.
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Thermophilic methanogens are common autotrophs at hydrothermal vents, but their growth constraints and dependence on H-2 syntrophy in situ are poorly understood. Between 2012 and 2015, methanogens and H2-producing heterotrophs were detected by growth...
      File Type:
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      2016
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      Limnology and Oceanography-Methods, 14(4), 268-277.
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
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      We introduce methods and software for estimating total seawater alkalinity from salinity and any combination of up to four other parameters (potential temperature, apparent oxygen utilization, total dissolved nitrate, and total silicate). The methods...
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    6. Estimating Total Alkalinity in the Washington State Coastal Zone: Complexities and Surprising Utility for Ocean Acidification Research
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
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      Evidence of ocean acidification (OA) throughout the global ocean has galvanized some coastal communities to evaluate carbonate chemistry variations closer to home. An impediment to doing this effectively is that, often, only one carbonate system para...
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
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      During tsunami inundation, coastal structures are subject to hydrostatic and hydrodynamic forces from the run-up and rundown and to impact forces from floating debris that is picked up by the flow. A new chapter in the upcoming revised U.S. design lo...
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      Zhang, D. X.; Cronin, M. F.; Wen, C. H.; Xue, Y.; Kumar, A.; McClurg, D.;
      Published Date:
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      Journal of Geophysical Research-Oceans, 121(9), 6874-6890.
      Series:
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      Description:
      Previous studies have found large biases and uncertainties in the air-sea fluxes from Numerical Weather Prediction model reanalyses, which must be identified and reduced in order to make progress on weather and climate predictions. Here air-sea heat ...
      File Type:
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      Personal Author:
      Tao, C. H.; Chen, S.; Baker, E. T.; Li, H. M.; Liang, J.; Liao, S. L.; Chen, Y. J.; Deng, X. M.; Zhang, G. Y.; Gu, C. H.; Wu, J. L.;
      Published Date:
      2017
      Source:
      Marine Geophysical Research, 38(1-2), 3-16.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Seafloor hydrothermal polymetallic sulfide deposits are a new type of resource, with great potential economic value and good prospect development. This paper discusses turbidity, oxidation-reduction potential, and temperature anomalies of hydrotherma...
      File Type:
      Filetype[PDF - 1.06 MB]
    10. Southeast Alaskan shelf from southern tip of Baranof Island to Kayak Island: Currents, mixing and chlorophyll-a
      Personal Author:
      Stabeno, P. J.; Bond, N. A.; Kachel, N. B.; Ladd, C.; Mordy, C. W.; Strom, S. L.;
      Published Date:
      2016
      Source:
      Deep-Sea Research Part Ii-Topical Studies in Oceanography, 132, 6-23.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      During 2011 and 2013, an integrated,ecosystem study was undertaken on the Southeast Alaska shelf and slope. As part of that study, a total of 8 moorings were deployed each year along the coast of Baranof and Chichagof Islands, in Cross Sound and at I...
      File Type:
      Filetype[PDF - 9.79 MB]
    11. A preliminary 1-D model investigation of tidal variations of temperature and chlorinity at the Grotto mound, Endeavour Segment, Juan de Fuca Ridge
      Personal Author:
      Xu, G.; Larson, B. I.; Bemis, K. G.; Lilley, M. D.;
      Published Date:
      2017
      Source:
      Geochemistry Geophysics Geosystems, 18(1), 75-92.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Tidal oscillations of venting temperature and chlorinity have been observed in the long-term time series data recorded by the Benthic and Resistivity Sensors (BARS) at the Grotto mound on the Juan de Fuca Ridge. In this study, we use a one-dimensiona...
      File Type:
      Filetype[PDF - 3.78 MB]
    12. Significant discharge of CO2 from hydrothermalism associated with the submarine volcano of El Hierro Island
      Personal Author:
      Santana-Casiano, J. M.; Fraile-Nuez, E.; Gonzalez-Davila, M.; Baker, E. T.; Resing, J. A.; Walker, S. L.;
      Published Date:
      2016
      Source:
      Scientific Reports, 6, 25686.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      The residual hydrothermalism associated with submarine volcanoes, following an eruption event, plays an important role in the supply of CO2 to the ocean. The emitted CO2 increases the acidity of seawater. The submarine volcano of El Hierro, in its de...
      File Type:
      Filetype[PDF - 1.53 MB]
    13. Linkages between mineralogy, fluid chemistry, and microbial communities within hydrothermal chimneys from the Endeavour Segment, Juan de Fuca Ridge
      Personal Author:
      Lin, T. J.; Ver Eecke, H. C.; Breves, E. A.; Dyar, M. D.; Jamieson, J. W.; Hannington, M. D.; Dahle, H.; Bishop, J. L.; Lane, M. D.; Butterfield, D. A.; Kelley, D. S.; Lilley, M. D.; Baross, J. A.; Holden, J. F.;
      Published Date:
      2016
      Source:
      Geochemistry Geophysics Geosystems, 17(2), 300-323.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Rock and fluid samples were collected from three hydrothermal chimneys at the Endeavour Segment, Juan de Fuca Ridge to evaluate linkages among mineralogy, fluid chemistry, and microbial community composition within the chimneys. Mossbauer, midinfrare...
      File Type:
      Filetype[PDF - 3.25 MB]
    14. Coupled ocean-atmosphere loss of marine refractory dissolved organic carbon
      Personal Author:
      Kieber, D. J.; Keene, W. C.; Frossard, A. A.; Long, M. S.; Maben, J. R.; Russell, L. M.; Kinsey, J. D.; Tyssebotn, I. M. B.; Quinn, P. K.; Bates, T. S.;
      Published Date:
      2016
      Source:
      Geophysical Research Letters, 43(6), 2765-2772.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      The oceans hold a massive quantity of organic carbon, nearly all of which is dissolved and more than 95% is refractory, cycling through the oceans several times before complete removal. The vast reservoir of refractory dissolved organic carbon (RDOC)...
      File Type:
      Filetype[PDF - 338.63 KB]
    15. A dissolved cobalt plume in the oxygen minimum zone of the eastern tropical South Pacific
      Personal Author:
      Hawco, N. J.; Ohnemus, D. C.; Resing, J. A.; Twining, B. S.; Saito, M. A.;
      Published Date:
      2016
      Source:
      Biogeosciences, 13(20), 5697-5717.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Cobalt is a nutrient to phytoplankton, but knowledge about its biogeochemical cycling is limited, especially in the Pacific Ocean. Here, we report sections of dissolved cobalt and labile dissolved cobalt from the US GEOTRACES GP16 transect in the Sou...
      File Type:
      Filetype[PDF - 4.39 MB]
    16. A model-based examination of multivariate physical modes in the Gulf of Alaska
      Personal Author:
      Hermann, A. J.; Ladd, C.; Cheng, W.; Curchitser, E. N.; Hedstrom, K.;
      Published Date:
      2016
      Source:
      Deep-Sea Research Part Ii-Topical Studies in Oceanography, 132, 68-89.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      We use multivariate output from a hydrodynamic model of the Gulf of Alaska (GOA) to explore the covariance among its physical state and air/sea fluxes. We attempt to summarize this coupled variability using a limited set of patterns, and examine thei...
      File Type:
      Filetype[PDF - 13.27 MB]
    17. Dependence of subsurface chlorophyll on seasonal water masses in the Chukchi Sea
      Personal Author:
      Martini, K. I.; Stabeno, P. J.; Ladd, C.; Winsor, P.; Weingartner, T. J.; Mordy, C. W.; Eisner, L. B.;
      Published Date:
      2016
      Source:
      Journal of Geophysical Research-Oceans, 121(3), 1755-1770.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      During the late summer, phytoplankton in the northeastern Chukchi Sea are typically found in subsurface layers. These layers and their sensitivity to local changes in hydrography and nutrient concentrations are characterized by combining data from a ...
      File Type:
      Filetype[PDF - 6.99 MB]
    18. Using present-day observations to detect when anthropogenic change forces surface ocean carbonate chemistry outside preindustrial bounds
      Personal Author:
      Sutton, A. J.; Sabine, C. L.; Feely, R. A.; Cai, W. J.; Cronin, M. F.; McPhaden, M. J.; Morell, J. M.; Newton, J. A.; Noh, J. H.; Olafsdottir, S. R.; Salisbury, J. E.; Send, U.; Vandemark, D. C.; Weller, R. A.;
      Published Date:
      2016
      Source:
      Biogeosciences, 13(17), 5065-5083.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      One of the major challenges to assessing the impact of ocean acidification on marine life is detecting and interpreting long-term change in the context of natural variability. This study addresses this need through a global synthesis of monthly pH an...
      File Type:
      Filetype[PDF - 2.19 MB]
    19. Experiments with Seasonal Forecasts of ocean conditions for the Northern region of the California Current upwelling system
      Personal Author:
      Siedlecki, S. A.; Kaplan, I. C.; Hermann, A. J.; Nguyen, T. T.; Bond, N. A.; Newton, J. A.; Williams, G. D.; Peterson, William Thornton; Alin, S. R.; Feely, R. A.;
      Published Date:
      2016
      Source:
      Scientific Reports, 6, 27203.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Resource managers at the state, federal, and tribal levels make decisions on a weekly to quarterly basis, and fishers operate on a similar timeframe. To determine the potential of a support tool for these efforts, a seasonal forecast system is experi...
      File Type:
      Filetype[PDF - 3.24 MB]
    20. Gap winds and their effects on regional oceanography Part I: Cross Sound, Alaska
      Personal Author:
      Ladd, C.; Cheng, W.;
      Published Date:
      2016
      Source:
      Deep-Sea Research Part Ii-Topical Studies in Oceanography, 132, 41-53.
      Series:
      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Gap-wind events flowing from Cross Sound in the eastern Gulf of Alaska (GOA) were examined using QuikSCAT wind data. The average duration of an event is 3.6 days with the longest event recorded in the QuikSCAT dataset being 12 days. Daily offshore di...
      File Type:
      Filetype[PDF - 4.90 MB]
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