Earth System Research Laboratory Halocarbons and Other Atmospheric Trace Gases Chromatograph for Atmospheric Trace Species (CATS) Measurements

Description

The Halocarbons and other Atmospheric Trace Species (HATS) group aims to quantify the distributions and magnitudes of sources and sinks for atmospheric nitrous oxide and halogen containing compounds. They utilize numerous types of platforms, including ground-based stations, towers, ships, aircraft, and balloons to accomplish their mission. HATS also measures chlorofluorocarbons (CFCs) at its various measurement sites. CFCs are nontoxic, nonflammable chemicals that contains atoms of carbon, chlorine, and fluorine. They are classified as halocarbons which are compounds that contain carbon and halogen atoms. CFCs were used as solvents, refrigerants, and aerosol sprays. While inert in the lower atmosphere, CFCs decompose in the upper atmosphere (stratosphere) with some of the released chlorine becoming active in destroying ozone in the stratosphere. Over time this lead to the creation of the "Ozone Hole" over the Antarctic. Monitoring the amounts of CFCs and other trace gases is important to tracking the growth or recovery of the Ozone Hole. The Chromatograph for Atmospheric Trace Species (CATS) instruments have been in operation at the NOAA baseline observatories (Barrow, AK, Mauna Loa, HI, American Samoa, and South Pole, Antarctica) since 1999. The CATS instrument measure nitrous oxide (N2O), sulfur hexafluoride (SF6), chlorofluorocarbons (CFC-12 (CCl2F2), CFC-11 (CCl3F), and CFC-113 (CCl2F-CClF2)), Halon-1211 (CBrClF2), methyl chloroform (CH3CCl3), and carbon tetrachloride (CCl4). The CATS gas chromatographs are custom built instruments that contain separation columns, flow controllers, an air selection valve, and an electron capture detector; all used for making measurements. Through the Big Earth Data Initiative (BEDI), ESRL/GMD has taken their data collection and converted files into NetCDF-4, a self-describing format.

Resources

Name Format Description Link
0 Direct download for data. ftp://aftp.cmdl.noaa.gov/hats
0 Project page with dataset information. https://www.esrl.noaa.gov/gmd/hats/
0 Project page with dataset information. https://www.esrl.noaa.gov/gmd/hats/insitu/cats/
0 Overview of the GCOS Essential Climate Variables. https://public.wmo.int/en/programmes/global-climate-observing-system/essential-climate-variables
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 PDF of Hall et al. 2011 https://www.atmos-meas-tech.net/4/2441/2011/
0 PDF from Wiley Online Library http://onlinelibrary.wiley.com/doi/10.1029/97JD00130/pdf
0 PDF from Wiley Online Library http://onlinelibrary.wiley.com/doi/10.1029/98JD01879/abstract
0 Landing page for the dataset. https://doi.org/10.7289/V5X0659V
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 PDF of WCC-Empa Report https://www.empa.ch/documents/56101/250799/Barrow08.pdf/4b30e4d5-3e3a-40bb-b11c-2f2a7921f366
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords

Tags

  • vertical location
  • hfcs
  • alaska
  • esrl
  • united states of america
  • montreal protocal
  • land surface
  • halocarbons
  • colorado
  • nesdis
  • gas chromatographs
  • atmospheric - composition - nitrous oxide and greenhouse gases (including cfcs
  • halocarbons and halogens
  • sf6 and pfcs)
  • methyl chloroform
  • nitrogen compounds
  • atmospheric chemistry
  • halons
  • american samoa
  • atmosphere
  • continent
  • noaa
  • methane and other greenhouse gases (including n2o
  • ozone depletion
  • hawaii
  • antarctica
  • atmospheric - composition - carbon dioxide
  • earth system research laboratory
  • north america
  • hourly - < daily
  • noaa earth science research laboratory stations
  • u.s. department of commerce
  • earth science
  • global monitoring division
  • ocean
  • earth system research laboratory (noaa)
  • doc/noaa/nesdis/ncei
  • air monitoring stations/networks
  • greenland
  • chlorofluorocarbons
  • nitrous oxide
  • central pacific ocean
  • esrl stations
  • and sf6)
  • cfcs
  • hcfcs
  • pacific ocean
  • point resolution
  • carbon tetrachloride
  • national centers for environmental information
  • doc/noaa/esrl/gmd

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Categories