{"NOAAStudyId":"2460","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"1998-07-01","dataPublisher":"NOAA","dataType":"ICE CORES","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/ice-core","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-icecore-2460.xml","doi":null,"earliestYearBP":942,"earliestYearCE":1008,"entryId":"noaa-icecore-2460","funding":[],"investigators":"Etheridge, D.M.; Steele, L.P.; Francey, R.J.; Langenfelds, R.L.","mostRecentYearBP":-42,"mostRecentYearCE":1992,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/2460","originalSource":null,"publication":[{"abstract":null,"author":null,"citation":"Etheridge, D.M., L.P. Steele, R.J. Francey, and R.L. Langenfelds. 1998. Atmospheric methane between 1000 A.D. and present: Evidence of anthropogenic emissions and climatic variability. Journal of Geophysical Research 103(D13):15,979-15,993.","edition":null,"identifier":null,"issue":null,"journal":"Journal of Geophysical Research: Atmospheres","pages":null,"pubRank":"1","pubYear":1998,"reportNumber":null,"title":"Atmospheric methane between 1000 A.D. and present: Evidence of anthropogenic emissions and climatic variability","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19999","geo":{"geoType":"Feature","geometry":{"coordinates":["-66.73","112.83"],"type":"POINT"},"properties":{"easternmostLongitude":"112.83","maxElevationMeters":"1390","minElevationMeters":"1390","northernmostLatitude":"-66.73","southernmostLatitude":"-66.73","westernmostLongitude":"112.83"}},"locationName":"Continent>Antarctica","mappable":"Y","paleoData":[{"NOAADataTableId":"38189","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>atmospheric gas"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law_ch4.txt","linkText":"law_ch4.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age>ice age"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age>gas age"},{"cvAdditionalInfo":"present defined as 2000 A.D.","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age>gas age"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE FORCING|ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":"gas chromatography","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per billion","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>methane"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>sample identification"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE FORCING|ICE CORES","cvDetail":"smoothed","cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":"gas chromatography","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per billion","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>methane"}]}],"dataTableName":"Law CH4 Etheridge1998","dataTableNotes":"Atmospheric CH4 mixing ratios, from Law Dome (Antarctica) and Summit (Greenland) ice cores. Etheridge, D.M., L.P. Steele, R.J. Francey, and R.L. Langenfelds, Atmospheric methane between 1000 AD and present: Evidence of anthropogenic emissions and climatic variability. Journal of Geophysical Research, 103, D13, 15,979-15,993, 1998.\t\t\t\t\t\r\nPlease see the above paper or contact David Etheridge, CSIRO, Australia with any queries. CH4 from DE08, DE08-2 and DSS ice cores (Antarctica). From Figure 2.","earliestYear":1008,"earliestYearBP":942,"earliestYearCE":1008,"mostRecentYear":1992,"mostRecentYearBP":-42,"mostRecentYearCE":1992,"species":[],"timeUnit":"AD"}],"siteName":"Law Dome"}],"studyCode":null,"studyName":"Law Dome - Methane Data and Description","studyNotes":null,"version":"1.0","xmlId":"1274"}