{"NOAAStudyId":"13139","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":"2012-07-24","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-13139.xml","doi":null,"earliestYearBP":21328,"earliestYearCE":-19378,"entryId":"noaa-icecore-13139","funding":[],"investigators":"Pedro, J.B.; Rasmussen, S.O.; van Ommen, T.D.","mostRecentYearBP":8580,"mostRecentYearCE":-6630,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13139","originalSource":null,"publication":[{"abstract":"Antarctic ice cores provide clear evidence of a close coupling \r\nbetween variations in Antarctic temperature and the atmospheric \r\nconcentration of CO2 during the glacial/interglacial cycles of \r\nat least the past 800-thousand years. Precise information on \r\nthe relative timing of the temperature and CO2 changes can \r\nassist in refining our understanding of the physical processes \r\ninvolved in this coupling. Here, we focus on the last deglaciation, \r\n19 000 to 11 000 yr before present, during which CO2 concentrations \r\nincreased by ~80 parts per million by volume and Antarctic \r\ntemperature increased by ~10°C. Utilising a recently developed\r\nproxy for regional Antarctic temperature, derived from five\r\nnear-coastal ice cores and two ice core CO2 records with high\r\ndating precision, we show that the increase in CO2 likely lagged \r\nthe increase in regional Antarctic temperature by less than 400 yr \r\nand that even a short lead of CO2 over temperature cannot be \r\nexcluded. This result, consistent for both CO2 records, implies \r\na faster coupling between temperature and CO2 than previous \r\nestimates, which had permitted up to millennial-scale lags.\r\n","author":null,"citation":"Pedro, J.B., S.O. Rasmussen, and T.D. van Ommen. 2012. \r\nTightened constraints on the time-lag between Antarctic \r\ntemperature and CO2 during the last deglaciation. \r\nClim. Past, 8, 1213-1221. \r\nwww.clim-past.net/8/1213/2012/ \r\ndoi:10.5194/cp-8-1213-2012 ","edition":null,"identifier":{"id":"10.5194/cp-8-1213-2012","type":"doi","url":"http://dx.doi.org/10.5194/cp-8-1213-2012"},"issue":null,"journal":"Climate of the Past","pages":null,"pubRank":"1","pubYear":2012,"reportNumber":null,"title":"Tightened constraints on the time-lag between Antarctic  temperature and CO2 during the last deglaciation","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["carbon cycle"],"site":[{"NOAASiteId":"19979","geo":{"geoType":"Feature","geometry":{"coordinates":["-80.02","-119.52"],"type":"POINT"},"properties":{"easternmostLongitude":"-119.52","maxElevationMeters":"1530","minElevationMeters":"1530","northernmostLatitude":"-80.02","southernmostLatitude":"-80.02","westernmostLongitude":"-119.52"}},"locationName":"Continent>Antarctica","mappable":"Y","paleoData":[{"NOAADataTableId":"22616","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>atmospheric gas"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/byrd/byrd-siple2012co2.txt","linkText":"byrd-siple2012co2.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":null,"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":"CLIMATE FORCING|ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per million","cvWhat":"chemical composition>compound>inorganic compound>carbon dioxide"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE FORCING|ICE CORES","cvDetail":null,"cvError":"one standard deviation","cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per million","cvWhat":"chemical composition>compound>inorganic compound>carbon dioxide"}]},{"NOAAKeywords":["earth science>paleoclimate>ice core>atmospheric gas"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/byrd/byrd-siple2012co2.xls","linkText":"byrd-siple2012co2.xls","urlDescription":"Data","variables":[]}],"dataTableName":"Byrd2012CO2","dataTableNotes":null,"earliestYear":21010,"earliestYearBP":21010,"earliestYearCE":-19060,"mostRecentYear":8664,"mostRecentYearBP":8664,"mostRecentYearCE":-6714,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Byrd"},{"NOAASiteId":"20001","geo":{"geoType":"Feature","geometry":{"coordinates":["-81.65","-148.82"],"type":"POINT"},"properties":{"easternmostLongitude":"-148.82","maxElevationMeters":"621","minElevationMeters":"621","northernmostLatitude":"-81.65","southernmostLatitude":"-81.65","westernmostLongitude":"-148.82"}},"locationName":"Continent>Antarctica","mappable":"Y","paleoData":[{"NOAADataTableId":"22617","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>atmospheric gas"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/byrd/byrd-siple2012co2.txt","linkText":"byrd-siple2012co2.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":null,"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":"CLIMATE FORCING|ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per million","cvWhat":"chemical composition>compound>inorganic compound>carbon dioxide"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE FORCING|ICE CORES","cvDetail":null,"cvError":"one standard deviation","cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per million","cvWhat":"chemical composition>compound>inorganic compound>carbon dioxide"}]},{"NOAAKeywords":["earth science>paleoclimate>ice core>atmospheric gas"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/byrd/byrd-siple2012co2.xls","linkText":"byrd-siple2012co2.xls","urlDescription":"Data","variables":[]}],"dataTableName":"Siple2012CO2","dataTableNotes":null,"earliestYear":21328,"earliestYearBP":21328,"earliestYearCE":-19378,"mostRecentYear":8580,"mostRecentYearBP":8580,"mostRecentYearCE":-6630,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Siple Dome"}],"studyCode":null,"studyName":"Byrd and Siple Dome 9-21 ka CO2 data on GICC05 Timescale ","studyNotes":"CO2 data from the Byrd and Siple Dome ice cores placed on \nthe Greenland Ice Core Chronology 2005 (GICC05) timescale \nfor 9 - 21 KYrBP. \n\nThe regional Antarctic temperature proxy data series \nis available elsewhere: \nftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2011iso.txt \nThe locations and original references for the CO2 data and transfers \nto the GICC05 timescale are as follows: \n\t\nByrd\t\nLocation: 80°01’S 119°31’W \nElevation: 1530 m asl \nReference for transfer to GICC05 timescale: Pedro et al., Clim. Past. 8, 2012. \nReference for CO2 data:  (1) Neftel, A., Oeschger, H., Staffelbach, T., and \nNature, 331, 609–611, doi:10.1038/331609a0, 1988. \n(2) Staffelbach, T., Stauffer, B., Sigg, A., and Oeschger, H.: CO2 \nmeasurements from polar ice cores – More data from different \nsites, Tellus B, 43, 91–96, doi:10.1034/j.1600-0889.1991.t01-1- \n00003.x, 1991. \n\t\t\nSiple Dome \nLocation: 81° 40'S 148° 49'W \nElevation: 621 m asl \nReference for transfer to GICC05 timescale: Pedro et al., Clim. Past. 8, 2012. \nReference for CO2 data: \nAhn, J., Wahlen, M., Deck, B. L., Brook, E. J., Mayewski, \nP. A., Taylor, K. C., and White, J. W. C.: A record of atmospheric \nCO2 during the last 40,000 years from the Siple \nDome, Antarctica ice core, J. Geophys. Res., 109, D13305, \ndoi:10.1029/2003JD004415, 2004. \nByrd Ice Core: 80.01°S , 119.51°W; 1530 m elev. \nSiple Dome Ice Core, West Antarctica: 81°40'S, 148°49'W \n","version":"1.0","xmlId":"11181"}