Earth System Research Laboratory Halocarbons and Other Atmospheric Trace Gases Chromatograph for Atmospheric Trace Species (CATS) Measurements
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title: Earth System Research Laboratory Halocarbons and Other Atmospheric Trace Gases Chromatograph for Atmospheric Trace Species (CATS) Measurements
alternateTitle: ESRL GMD HATS CATS
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date: 2017-11
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date: 1998-06-01
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Anchor: DOI doi:10.7289/V5X0659V
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code: NCEI DSI 3269_02
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individualName: Dutton, Geoffrey
organisationName: DOC/NOAA/ESRL/GMD > Global Monitoring Division, Earth System Research Laboratory, NOAA, U.S. Department of Commerce
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individualName: Dutton, Geoffrey
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individualName: Elkins, James
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positionName: Group Chief, Halocarbons and other Atmospheric Trace Species Group
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individualName: Hall, Bradley
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abstract: 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.
purpose: The general mission of the Halocarbons and other Atmospheric Trace Species group is to quantify the distributions and magnitudes of sources and sinks for atmospheric nitrous oxide (N2O) and halogen containing compounds.
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keyword: Earth Science > Atmosphere > Atmospheric Chemistry > Nitrogen Compounds > Nitrous Oxide
keyword: Earth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Chlorofluorocarbons
keyword: Earth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Halons
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keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > METHYL CHLOROFORM
keyword: Ozone Depletion
keyword: Montreal Protocal
keyword: Halocarbons
keyword: Atmospheric - Composition - Nitrous Oxide and Greenhouse Gases (including CFCs, halons, and SF6)
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otherConstraints: Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
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environmentDescription: Initial peak integration of chromatograms is conducted on a Linux computer using GCwerks software. Python scripts perform initial quality control and data consolidation. Finally, quality control and processing are completed on an Apple computer using custom software developed in Igor Pro.
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distributorTransferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://doi.org/10.7289/V5X0659V
protocol: HTTPS
applicationProfile: Landing Page
name: NCEI Dataset Landing Page
description: Landing page for the dataset.
function: (CI_OnLineFunctionCode) information
distributorTransferOptions: (MD_DigitalTransferOptions)
transferSize: (missing)
onLine: (CI_OnlineResource)
linkage: ftp://aftp.cmdl.noaa.gov/hats
applicationProfile: Download
name: ESRL Direct Download
description: Direct download for data.
function: (CI_OnLineFunctionCode) download
distributorTransferOptions: (MD_DigitalTransferOptions)
transferSize: (missing)
onLine: (CI_OnlineResource)
linkage: https://www.esrl.noaa.gov/gmd/hats/
protocol: HTTPS
applicationProfile: Information
name: ESRL/GMD HATS Group Website
description: Project page with dataset information.
function: (CI_OnLineFunctionCode) information
distributorTransferOptions: (MD_DigitalTransferOptions)
transferSize: (missing)
onLine: (CI_OnlineResource)
linkage: https://www.esrl.noaa.gov/gmd/hats/insitu/cats/
protocol: HTTPS
applicationProfile: Information
name: ESRL/GMD HATS CATS Data Website
description: Project page with dataset information.
function: (CI_OnLineFunctionCode) information
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) dataset
extent: #boundingExtent
lineage: (LI_Lineage)
statement: Raw data are collected at field sites, transferred daily to an NOAA server where initial processing is performed. Finally, quality control and processing are conducted on a desktop computer about quarterly.
processStep: (LE_ProcessStep)
description: Typical data processing involves peak integration, calculating detector response and correcting for drift, applying calibrations, calculating mixing ratios. Quality control and data flagging may occur at any of these steps.
dateTime: (missing)
processor: (CI_ResponsibleParty)
organisationName: DOC/NOAA/ESRL/GMD > Global Monitoring Division, Earth System Research Laboratory, NOAA, U.S. Department of Commerce
role: (CI_RoleCode) processor
source: sd001
source: (LE_Source)
description: ESRL GMD HATS CATS Program Measurements
sourceCitation: (CI_Citation)
title: Earth System Research Laboratory Halocarbons and Other Atmospheric Trace Gases Chromatograph for Atmospheric Trace Species (CATS) Measurements
date: (missing)
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: DOC/NOAA/ESRL/GMD > Global Monitoring Division, Earth System Research Laboratory, NOAA, U.S. Department of Commerce
role: (CI_RoleCode) originator
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: (missing)
role: (missing)
sourceExtent: (EX_Extent)
geographicElement: (EX_GeographicBoundingBox)
extentTypeCode: 1
westBoundLongitude: -180.0
eastBoundLongitude: 180.0
southBoundLatitude: -90.0
northBoundLatitude: 90.0
temporalElement: (EX_TemporalExtent)
extent:
TimePeriod:
beginPosition: 1998-06-01
endPosition:
sourceStep: ps001
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) repository
levelDescription: (MD_ScopeDescription)
other: NOAA National Centers for Environmental Information
lineage: (LI_Lineage)
processStep: (LE_ProcessStep)
description: NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
dateTime:
DateTime: 2015-04-22T00:00:00
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metadataMaintenance: (MD_MaintenanceInformation)
maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) asNeeded
maintenanceNote: Bulk metadata change applied on 2023-06-23. See version control repository history for metadata change details.
