{
    "identifier": "gov.noaa.ncdc:C01554",
    "accessLevel": "public",
    "contactPoint": {
        "@type": "vcard:Contact",
        "fn": "Your contact point",
        "hasEmail": "mailto:[email protected]"
    },
    "programCode": [
        "010:000"
    ],
    "landingPage": "",
    "title": "Earth System Research Laboratory Halocarbons and Other Atmospheric Trace Gases Otto Instrument Measurements",
    "description": "The Halocarbons and other Atmospheric Trace Species (HATS) group aims to quantify the atmospheric burden, and the distributions and magnitudes of sources and sinks for nitrous oxide and other halogen containing compounds. They utilize numerous types of platforms, including ground-based stations, towers, ships, aircraft, and balloons to accomplish their mission. HATS measures chlorofluorocarbons (CFCs) at measurement sites spanning the globe. CFCs are non-toxic, non-flammable chemicals that contain carbon, chlorine, and fluorine atoms. CFCs were used as solvents, refrigerants, and aerosol sprays. While inert in the troposphere, they decompose in the stratosphere to release chlorine for destructive reactions with ozone. This process eventually led to the creation of the \"Ozone Hole\" over the Antarctic. Monitoring the amounts of CFCs and other trace gases is important, both for tracking the growth and recovery of the Ozone Hole, and because many upward trending trace gases are potent and durable greenhouse gases.\n\nAutomated flask sampling electron capture gas chromatograph (\"Otto\"): The Otto instrument has been in continuous use since late 1994 when the original Pre-Otto system was entering retirement. Since 1994, Otto has continued to analyze samples from the seven sites used by the Pre-Otto system. As of 2017, Otto's sampling network has expanded to include weekly air sampling at six additional sites including Summit Station, Greenland (SUM), Mace Head, Ireland (MHD), Park Falls, Wisconsin (LEF), Harvard Forest, Massachusetts (HFM),  Cape Kumukahi, Hawaii (KUM), and Palmer Station, Antarctica (PSA). Sampling at Trinidad Head, California (THD), Grifton, North Carolina (ITN), and Ushuaia, Argentina (USH) has also come and gone during this period. The original three gases measured by GC-ECD since 1977 (N2O, CFC-12 and CFC-11) were extended to include CFC-113, CH3CCl3, CCl4 and SF6 when Otto came online. \n\nThrough the Big Earth Data Initiative (BEDI), ESRL\/GMD has taken their data collection and converted files into NetCDF-4, a self-describing format.",
    "language": "",
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    ],
    "bureauCode": [
        "010:04"
    ],
    "modified": "2025-11-20T02:55:25.160Z",
    "publisher": {
        "@type": "org:Organization",
        "name": "Your Publisher"
    },
    "theme": "",
    "keyword": [
        "Earth Science > Atmosphere > Atmospheric Chemistry > Nitrogen Compounds > Nitrous Oxide",
        "Earth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Chlorofluorocarbons",
        "Earth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Carbon Tetrachloride",
        "Atmospheric - Composition - Carbon Dioxide, Methane and other Greenhouse Gases (including N2O, CFCs, HCFCs, HFCs, SF6 and PFCs)",
        "Continent > North America > United States Of America > Alaska",
        "Continent > North America > United States Of America > Hawaii",
        "Continent > North America > United States Of America > Colorado",
        "Ocean > Pacific Ocean > Central Pacific Ocean > American Samoa",
        "Continent > Antarctica",
        "Continent > North America > Canada > Nunavut",
        "Continent > Australia\/New Zealand > Australia",
        "Continent > North America > Greenland",
        "Continent > Europe > Northern Europe > British Isles > Ireland",
        "Continent > North America > United States Of America > Wisconsin",
        "Continent > North America > United States Of America > Massachusetts",
        "Continent > North America > United States Of America > California",
        "Continent > Asia > Western Asia > Middle East > Israel",
        "Continent > Asia > Eastern Asia > China",
        "Vertical Location > Land Surface",
        "ESRL > Earth System Research Laboratory (NOAA)",
        "GAS CHROMATOGRAPHS",
        "AIR MONITORING STATIONS\/NETWORKS",
        "ESRL STATIONS > NOAA Earth Science Research Laboratory Stations",
        "Point Resolution",
        "Point Resolution",
        "DOC\/NOAA\/ESRL\/GMD > Global Monitoring Division, Earth System Research Laboratory, NOAA, U.S. Department of Commerce",
        "DOC\/NOAA\/NESDIS\/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce",
        "EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > METHYL CHLOROFORM",
        "EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > SULFUR COMPOUNDS > SULFUR HEXAFLUORIDE",
        "OZONE DEPLETING SUBSTANCES",
        "GREENHOUSE GASES",
        "MONTREAL PROTOCOL",
        "climatologyMeteorologyAtmosphere"
    ]
}