{"NOAAStudyId":"2476","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":"2003-07-01","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-2476.xml","doi":null,"earliestYearBP":418000,"earliestYearCE":-416050,"entryId":"noaa-icecore-2476","funding":[],"investigators":"Ruddiman, W.F.; Raymo, M.E.","mostRecentYearBP":2350,"mostRecentYearCE":-400,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/2476","originalSource":null,"publication":[{"abstract":null,"author":null,"citation":"Ruddiman, W.F., and M.E. Raymo. 2003. A methane-based time scale for Vostok ice. Quaternary Science Reviews 22(2-4):141-155.","edition":null,"identifier":null,"issue":null,"journal":"Quaternary Science Reviews","pages":null,"pubRank":"1","pubYear":2003,"reportNumber":null,"title":"A methane-based time scale for Vostok ice","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19976","geo":{"geoType":"Feature","geometry":{"coordinates":["-78.47","106.8"],"type":"POINT"},"properties":{"easternmostLongitude":"106.8","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"-78.47","southernmostLatitude":"-78.47","westernmostLongitude":"106.8"}},"locationName":"Continent>Antarctica","mappable":"Y","paleoData":[{"NOAADataTableId":"38176","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>atmospheric gas"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/vostok_methane_age.txt","linkText":"vostok_methane_age.txt","urlDescription":"Data","variables":[{"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":"RR03","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar kiloyear before present","cvWhat":"age variable>age>gas age"},{"cvAdditionalInfo":"GT4","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar kiloyear before present","cvWhat":"age variable>age>gas age"},{"cvAdditionalInfo":"NJS","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar kiloyear before present","cvWhat":"age variable>age>gas age"},{"cvAdditionalInfo":"no gravitational correction","cvDataType":"CLIMATE FORCING|ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":"gas chromatography - flame ionization detection","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per million","cvWhat":"chemical composition>compound>inorganic compound>carbon dioxide"},{"cvAdditionalInfo":"no gravitational correction","cvDataType":"CLIMATE FORCING|ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":"wet extraction","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per million","cvWhat":"chemical composition>compound>inorganic compound>carbon dioxide"},{"cvAdditionalInfo":"gravitational correction","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil SMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":"gravitational correction","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":"wet extraction","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil SMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":"no gravitational correction","cvDataType":"CLIMATE FORCING|ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":"gas chromatography - flame ionization detection","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per billion","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>methane"},{"cvAdditionalInfo":"no gravitational correction","cvDataType":"CLIMATE FORCING|ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":"wet extraction","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per billion","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>methane"}]}],"dataTableName":"Vostok CH4timescale Ruddiman2003","dataTableNotes":"The CH4 time scale originally published by Ruddiman and Raymo [2003] incorrectly specified an age of zero years at a depth of 149.2 meters, the level of the uppermost methane analysis in the Vostok ice-core sequence. The age for this depth should instead be placed at 2.35 ka, as used by Petit et al. [1999].  The ages of all ice-core levels interpolated between this uppermost control and the first methane maximum at 321.2 meters (at 11,000 years ago) are increased accordingly.  \r\nAll ages from 11,000 through 344,000 years ago are those specified in Ruddiman and Raymo [2003]. Ages younger than 2.35 ka are extrapolated upward from our top two control points.","earliestYear":418000,"earliestYearBP":418000,"earliestYearCE":-416050,"mostRecentYear":2350,"mostRecentYearBP":2350,"mostRecentYearCE":-400,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Vostok"}],"studyCode":null,"studyName":"Vostok - Methane-Based Time Scale for Vostok Ice","studyNotes":null,"version":"1.0","xmlId":"1276"}