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Advancements, measurement uncertainties, and recent comparisons of the NOAA frost point hygrometer
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  • Personal Author:
  • Description:
    The NOAA frost point hygrometer (FPH) is a balloon-borne instrument flown monthly at three sites to measure water vapor profiles up to 28 km. The FPH record from Boulder, Colorado, is the longest continuous stratospheric water vapor record. The instrument has an uncertainty in the stratosphere that is <6% and up to 12% in the troposphere. A digital microcontroller version of the instrument improved upon the older versions in 2008 with sunlight filtering, better frost control, and resistance to radio frequency interference (RFI). A new thermistor calibration technique was implemented in 2014, decreasing the uncertainty in the thermistor calibration fit to less than 0.01 degrees C over the full range of frost - or dew point temperatures (-93 to +20 degrees C) measured during a profile. Results from multiple water vapor intercomparisons are presented, including the excellent agreement between the NOAA FPH and the direct tunable diode laser absorption spectrometer (dTDLAS) MC-PicT-1.4 during AquaVIT-2 chamber experiments over 6 days that provides confidence in the accuracy of the FPH measurements. Dual instrument flights with two FPHs or an FPH and a cryogenic frost point hygrometer (CFH) also show good agreement when launched on the same balloon. The results from these comparisons demonstrate the high level of accuracy of the NOAA FPH.

  • DOI:
    http://dx.doi.org/10.5194/amt-9-4295-2016
  • Document Type:
    Journal Article
  • Collection(s):
    Office of Oceanic and Atmospheric Research (OAR)
    NOAA Cooperative Institutes
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      2016
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      Journal of Geophysical Research-Atmospheres, 121(12), 7489-7505.
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      CIRES (Cooperative Institute for Research in Environmental Sciences)
      Description:
      The measured C-14:C-12 isotopic ratio of atmospheric CO2 (and its associated derived Delta C-14 value) is an ideal tracer for determination of the fossil fuel derived CO2 enhancement contributing to any atmospheric CO2 measurement (C-ff). Given enoug...
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      Ortega, I.; Coburn, S.; Berg, L. K.; Lantz, K.; Michalsky, J.; Ferrare, R. A.; Hair, J.; Hostetler, C. A.; Volkamer, R.;
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      Atmospheric Measurement Techniques, 9(8), 3893-3910.
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      Description:
      The multiannual global mean of aerosol optical depth at 550 nm (AOD(550))over land is similar to 0.19, and that over oceans is similar to 0.13. About 45% of the Earth surface shows AOD550 smaller than 0.1. There is a need for measurement techniques t...
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    8. Atmospheric histories and global emissions of halons H-1211 (CBrClF2), H-1301 (CBrF3), and H-2402 (CBrF2CBrF2)
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      Journal of Geophysical Research-Atmospheres, 121(7), 3663-3686.
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      Sweeney, C.; Dlugokencky, E.; Miller, C. E.; Wofsy, S.; Karion, A.; Dinardo, S.; Chang, R. Y. W.; Miller, J. B.; Bruhwiler, L.; Crotwell, A. M.; Newberger, T.; McKain, K.; Stone, R. S.; Wolter, S. E.; Lang, P. E.; Tans, P.;
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      Geophysical Research Letters, 43(12), 6604-6611.
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      Continuous measurements of atmospheric methane (CH4) mole fractions measured by NOAA's Global Greenhouse Gas Reference Network in Barrow, AK (BRW), show strong enhancements above background values when winds come from the land sector from July to Dec...
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      Alden, C. B.; Miller, J. B.; Gatti, L. V.; Gloor, M. M.; Guan, K.; Michalak, A. M.; van der Laan-Luijkx, I. T.; Touma, D.; Andrews, A.; Basso, L. S.; Correia, C. S. C.; Domingues, L. G.; Joiner, J.; Krol, M. C.; Lyapustin, A. I.; Peters, W.; Shiga, Y. P.; Thoning, K.; van der Velde, I. R.; van Leeuwen, T. T.; Yadav, V.; Diffenbaugh, N. S.;
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      Global Change Biology, 22(10), 3427-3443.
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      Eckert, E.; Laeng, A.; Lossow, S.; Kellmann, S.; Stiller, G.; von Clarmann, T.; Glatthor, N.; Hopfner, M.; Kiefer, M.; Oelhaf, H.; Orphal, J.; Funke, B.; Grabowski, U.; Haenel, F.; Linden, A.; Wetzel, G.; Woiwode, W.; Bernath, P. F.; Boone, C.; Dutton, G. S.; Elkins, J. W.; Engel, A.; Gille, J. C.; Kolonjari, F.; Sugita, T.; Toon, G. C.; Walker, K. A.;
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      Atmospheric Measurement Techniques, 9(7), 3355-3389.
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      Profiles of CFC-11 (CCl3F) and CFC-12 (CCl2F2) of the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) aboard the European satellite Envisat have been retrieved from versions MIPAS/4.61 to MI-PAS/4.62 and MIPAS/5.02 to MIPAS/5.06 lev...
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      Personal Author:
      LaFranchi, B. W.; McFarlane, K. J.; Miller, J. B.; Lehman, S. J.; Phillips, C. L.; Andrews, A. E.; Tans, P. P.; Chen, H.; Liu, Z.; Turnbull, J. C.; Xu, X.; Guilderson, T. P.;
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      2016
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      Journal of Geophysical Research-Biogeosciences, 121(8), 2275-2295.
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      CIRES (Cooperative Institute for Research in Environmental Sciences)
      Description:
      Radiocarbon in CO2 ((CO2)-C-14) measurements can aid in discriminating between fast (< 1 year) and slower (> 5-10 years) cycling of C between the atmosphere and the terrestrial biosphere due to the 14C disequilibrium between atmospheric and terrestri...
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    14. A multiyear estimate of methane fluxes in Alaska from CARVE atmospheric observations
      Personal Author:
      Miller, S. M.; Miller, C. E.; Commane, R.; Chang, R. Y. W.; Dinardo, S. J.; Henderson, J. M.; Karion, A.; Lindaas, J.; Melton, J. R.; Miller, J. B.; Sweeney, C.; Wofsy, S. C.; Michalak, A. M.;
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      2016
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      Global Biogeochemical Cycles, 30(10), 1441-1453.
      Series:
      CIRES (Cooperative Institute for Research in Environmental Sciences)
      Description:
      Methane (CH4) fluxes from Alaska and other arctic regions may be sensitive to thawing permafrost and future climate change, but estimates of both current and future fluxes from the region are uncertain. This study estimates CH4 fluxes across Alaska f...
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    15. Mesoscale modulation of air-sea CO2 flux in Drake Passage
      Personal Author:
      Song, H.; Marshall, J.; Munro, D. R.; Dutkiewicz, S.; Sweeney, C.; McGillicuddy, D. J.; Hausmann, U.;
      Published Date:
      2016
      Source:
      Journal of Geophysical Research-Oceans, 121(9), 6635-6649.
      Series:
      CIRES (Cooperative Institute for Research in Environmental Sciences)
      Description:
      We investigate the role of mesoscale eddies in modulating air-sea CO2 flux and associated biogeochemical fields in Drake Passage using in situ observations and an eddy-resolving numerical model. Both observations and model show a negative correlation...
      File Type:
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      Wood, R.; Stemmler, J. D.; Remillard, J.; Jefferson, A.;
      Published Date:
      2017
      Source:
      Journal of Geophysical Research-Atmospheres, 122(2), 1203-1223.
      Series:
      CIRES (Cooperative Institute for Research in Environmental Sciences)
      Description:
      A 20 month cloud condensation nucleus concentration (N-CCN) data set from Graciosa Island (39 degrees N, 28 degrees W) in the remote North Atlantic is used to characterize air masses with low cloud condensation nuclei (CCN) concentrations. Low-CCN ev...
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    17. Summertime surface O-3 behavior and deposition to tundra in the Alaskan Arctic
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      Van Dam, B.; Helmig, D.; Doskey, P. V.; Oltmans, S. J.;
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      2016
      Source:
      Journal of Geophysical Research-Atmospheres, 121(13), 8055-8066.
      Series:
      CIRES (Cooperative Institute for Research in Environmental Sciences)
      Description:
      Atmospheric turbulence quantities, boundary layer ozone (O-3) levels, and O-3 deposition to the tundra surface were investigated at Toolik Lake, AK, during the 2011 summer season. Beginning immediately after snowmelt, a diurnal cycle of O-3 in the at...
      File Type:
      Filetype[PDF - 2.83 MB]
    18. Separation of biospheric and fossil fuel fluxes of CO2 by atmospheric inversion of CO2 and (CO2)-C-14 measurements: Observation System Simulations
      Personal Author:
      Basu, S.; Miller, J. B.; Lehman, S.;
      Published Date:
      2016
      Source:
      Atmospheric Chemistry and Physics, 16(9), 5665-5683.
      Series:
      CIRES (Cooperative Institute for Research in Environmental Sciences)
      Description:
      National annual total CO2 emissions from combustion of fossil fuels are likely known to within 5-10aEuro-% for most developed countries. However, uncertainties are inevitably larger (by unknown amounts) for emission estimates at regional and monthly ...
      File Type:
      Filetype[PDF - 6.92 MB]
    19. Rising atmospheric methane: 2007-2014 growth and isotopic shift
      Personal Author:
      Nisbet, E. G.; Dlugokencky, E. J.; Manning, M. R.; Lowry, D.; Fisher, R. E.; France, J. L.; Michel, S. E.; Miller, J. B.; White, J. W. C.; Vaughn, B.; Bousquet, P.; Pyle, J. A.; Warwick, N. J.; Cain, M.; Brownlow, R.; Zazzeri, G.; Lanoiselle, M.; Manning, A. C.; Gloor, E.; Worthy, D. E. J.; Brunke, E. G.; Labuschagne, C.; Wolff, E. W.; Ganesan, A. L.;
      Published Date:
      2016
      Source:
      Global Biogeochemical Cycles, 30(9), 1356-1370.
      Series:
      CIRES (Cooperative Institute for Research in Environmental Sciences)
      Description:
      From 2007 to 2013, the globally averaged mole fraction of methane in the atmosphere increased by 5.7 +/- 1.2 ppb yr(-1). Simultaneously, delta C-13(CH4) (a measure of the C-13/C-12 isotope ratio in methane) has shifted to significantly more negative ...
      File Type:
      Filetype[PDF - 1.72 MB]
    20. A comprehensive estimate for loss of atmospheric carbon tetrachloride (CCl4) to the ocean
      Personal Author:
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      Published Date:
      2016
      Source:
      Atmospheric Chemistry and Physics, 16(17), 10899-10910.
      Series:
      CIRES (Cooperative Institute for Research in Environmental Sciences)
      Description:
      Extensive undersaturations of carbon tetrachloride (CCl4) in Pacific, Atlantic, and Southern Ocean surface waters indicate that atmospheric CCl4 is consumed in large amounts by the ocean. Observations made on 16 research cruises between 1987 and 2010...
      File Type:
      Filetype[PDF - 2.61 MB]
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