Earth System Research Laboratory Carbon Cycle and Greenhouse Gases Group Continuous Insitu Measurements of CO2, CH4, and CO at Global Background Sites, 1973-Present
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title: Earth System Research Laboratory Carbon Cycle and Greenhouse Gases Group Continuous Insitu Measurements of CO2, CH4, and CO at Global Background Sites, 1973-Present
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abstract: The Global Greenhouse Gas Reference Network for the Carbon Cycle and Greenhouse Gases (CCGG) Group is part of NOAA'S Earth System Research Laboratory (ESRL) in Boulder, CO. The Reference Network measures the atmospheric distribution and trends of the three main long-term drivers of climate change, carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), as well as carbon monoxide (CO) which is an important indicator of air pollution. The Reference Network measurement program includes continuous in-situ measurements at 4 baseline observatories (global background sites) and 8 tall towers, as well as flask-air samples collected by volunteers at over 50 additional regional background sites and from small aircraft. The air samples are returned to ESRL for analysis where measurements of about 55 trace gases are done. NOAA's Global Greenhouse Gas Reference Network maintains the World Meteorological Organization international calibration scales for CO2, CH4, CO, N2O, and SF6 in air. The measurements of the Global Greenhouse Gas Reference Network serve as a comparison with measurements made by many other international laboratories, and with regional studies. They are widely used in studies inferring space-time patterns of emissions and removals of greenhouse gases that are optimally consistent with the atmospheric observations. They serve as an early warning for climate "surprises". The measurements are also helpful for the ongoing evaluation of remote sensing technologies. Observatory Measurements: NOAA/ESRL/GMD operates four staffed atmospheric baseline observatories from which numerous measurements of greenhouse gases are conducted. These baseline observatories, also known as global background sites, are located in Barrow, Alaska; Mauna Loa, Hawaii; American Samoa; and South Pole, Antarctica. The measured data are baseline levels, trends, and causes of variability of atmospheric gases that have the potential to affect global climate. These observatories were established in order to provide a sampling of the most remote air on the planet so that the true "background atmosphere" could be monitored. GMD first began continuous in-situ measurements of CO2 at these observatories in 1973, and added CH4 and CO measurements in the 1980's. The ongoing data set is contingent upon the baseline observatories that are still in use going forward. A subset of Observatory Measurements for only carbon dioxide (CO2) taken from Observatories is archived separately with digital object identifiers (DOIs) for each of the four observation stations listed above. The observations run from 1973 through the end of 2016. The main portion of this agreement is for the enhanced "version" of the more encompassing dataset for all of the different types of observation platforms and gases. 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 carefully calibrated and documented measurements of the Global Greenhouse Gas Reference Network serve as a comparison with measurements made by many other international laboratories, and with regional studies. They are widely used in studies inferring space-time patterns of emissions and removals of greenhouse gases that are optimally consistent with the atmospheric observations. The calibrated observations are also indispensable for the ongoing evaluation of remote sensing technologies.
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distributorTransferOptions: (MD_DigitalTransferOptions)
onLine: (CI_OnlineResource)
linkage: https://doi.org/10.7289/V5HD7SX5
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: https://www.esrl.noaa.gov/gmd/ccgg/insitu/
protocol: HTTPS
applicationProfile: Information
name: ESRL/GMD Observatory Group Website
description: Project page with dataset information.
function: (CI_OnLineFunctionCode) information
distributorTransferOptions: (MD_DigitalTransferOptions)
transferSize:
Real: 19
onLine: (CI_OnlineResource)
linkage: https://www.esrl.noaa.gov/gmd/ccgg/obspack/data.php?id=CCGGObservatoryInsitu
protocol: HTTPS
applicationProfile: Download
name: ESRL/GMD ObsPack Observatory Direct Download Website
description: Direct download for dataset files.
function: (CI_OnLineFunctionCode) download
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) dataset
extent: #boundingExtent
lineage: (LI_Lineage)
statement: Raw data are transferred from station computers back to NOAA/ESRL in Boulder, CO. Known corrections to the data are applied. Once data are analyzed the data are compiled into standard NetCDF files at ESRL/GMD and are archived at the NOAA National Centers for Environmental Information (NCEI).
processStep: (LE_ProcessStep)
description: Quality assurance checks on the raw data.
rationale: To take raw observations of the "background atmosphere" to obtain baseline levels, trends, and causes of variability of atmospheric gases that have the potential to affect global climate.
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: Global Monitoring Division Baseline Observatory Measurements
sourceCitation: (CI_Citation)
title: Earth System Research Laboratory Carbon Cycle and Greenhouse Gases Group Continuous Insitu Measurements of CO2, CH4, and CO at Global Background Sites, 1973-Present
date: (missing)
identifier: (MD_Identifier)
code: DOI: 10.7289/V5HD7SX5
citedResponsibleParty: (CI_ResponsibleParty)
organisationName: DOC/NOAA/ESRL/GMD > Global Monitoring Division, Earth System Research Laboratory, NOAA, U.S. Department of Commerce
role: (CI_RoleCode) owner
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: 1973-01-01
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.
