{"NOAAStudyId":"22519","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":"2017-05-19","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-22519.xml","doi":null,"earliestYearBP":277,"earliestYearCE":1673,"entryId":"noaa-icecore-22519","funding":[],"investigators":"Steig, E.J.","mostRecentYearBP":-50,"mostRecentYearCE":2000,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22519","originalSource":null,"publication":[{"abstract":"Changes in atmospheric circulation over the past five decades have enhanced the wind-driven inflow of warm ocean water onto the Antarctic continental shelf, where it melts ice shelves from below. Atmospheric circulation changes have also caused rapid warming over the West Antarctic Ice Sheet, and contributed to declining sea-ice cover in the adjacent Amundsen-Bellingshausen seas. It is unknown whether these changes are part of a longer-term trend. Here, we use water-isotope (d18O) data from an array of ice-core records to place recent West Antarctic climate changes in the context of the past two millennia. We find that the d18O of West Antarctic precipitation has increased significantly in the past 50 years, in parallel with the trend in temperature, and was probably more elevated during the 1990s than at any other time during the past 200 years. However, d18O anomalies comparable to those of recent decades occur about 1% of the time over the past 2,000 years. General circulation model simulations suggest that recent trends in d18O and climate in West Antarctica cannot be distinguished from decadal variability that originates in the tropics. We conclude that the uncertain trajectory of tropical climate variability represents a significant source of uncertainty in projections of West Antarctic climate and ice-sheet change.","author":{"name":"Eric J. Steig, Qinghua Ding, James W.C. White, Marcel Küttel, Summer B. Rupper, Thomas A. Neumann, Peter D. Neff, Ailie J.E. Gallant, Paul A. Mayewski, Kendrick C. Taylor, Georg Hoffmann, Daniel A. Dixon, Spruce W. Schoenemann, Bradley R. Markle, Tyler J. Fudge, David P. Schneider, Andrew J. Schauer, Rebecca P. Teel, Bruce H. Vaughn, Landon Burgener, Jessica Williams, Elena Korotkikh"},"citation":"Eric J. Steig, Qinghua Ding, James W.C. White, Marcel Küttel, Summer B. Rupper, Thomas A. Neumann, Peter D. Neff, Ailie J.E. Gallant, Paul A. Mayewski, Kendrick C. Taylor, Georg Hoffmann, Daniel A. Dixon, Spruce W. Schoenemann, Bradley R. Markle, Tyler J. Fudge, David P. Schneider, Andrew J. Schauer, Rebecca P. Teel, Bruce H. Vaughn, Landon Burgener, Jessica Williams, Elena Korotkikh. 2013. Recent climate and ice-sheet changes in West Antarctica compared with the past 2,000 years. Nature Geoscience, 6(5), 372-375. doi: 10.1038/ngeo1778","edition":null,"identifier":{"id":"10.1038/ngeo1778","type":"doi","url":"http://dx.doi.org/10.1038/ngeo1778"},"issue":"5","journal":"Nature Geoscience","pages":"372-375","pubRank":"1","pubYear":2013,"reportNumber":null,"title":"Recent climate and ice-sheet changes in West Antarctica compared with the past 2,000 years","type":"publication","volume":"6"},{"abstract":null,"author":{"name":"David P. Schneider and Eric J. Steig "},"citation":"David P. Schneider and Eric J. Steig. 2008. Ice cores record significant 1940s Antarctic warmth related to tropical climate variability. Proceedings of the National Academy of Sciences, 105(34),  12154-12158. doi: 10.1073/PNAS.0803627105","edition":null,"identifier":{"id":"10.1073/PNAS.0803627105","type":"doi","url":"http://dx.doi.org/10.1073/PNAS.0803627105"},"issue":"34","journal":"Proceedings of the National Academy of Sciences","pages":" 12154-12158","pubRank":"2","pubYear":2008,"reportNumber":null,"title":"Ice cores record significant 1940s Antarctic warmth related to tropical climate variability","type":"publication","volume":"105"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"20643","geo":{"geoType":"Feature","geometry":{"coordinates":["-79.37","-111.23"],"type":"POINT"},"properties":{"easternmostLongitude":"-111.23","maxElevationMeters":"1791","minElevationMeters":"1791","northernmostLatitude":"-79.37","southernmostLatitude":"-79.37","westernmostLongitude":"-111.23"}},"locationName":"Continent>Antarctica","mappable":"Y","paleoData":[{"NOAADataTableId":"33621","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/itase2000d18o.txt","linkText":"ITASE-2000-1 Oxygen Isotope Data","urlDescription":"Formnatted Text Data File","variables":[]}],"dataTableName":"ITASE2000-1d18O","dataTableNotes":null,"earliestYear":1673,"earliestYearBP":277,"earliestYearCE":1673,"mostRecentYear":2000,"mostRecentYearBP":-50,"mostRecentYearCE":2000,"species":[],"timeUnit":"AD"}],"siteName":"ITASE 00-1"}],"studyCode":null,"studyName":"ITASE-2000-1 Antarctic Ice Core 330 Year Oxygen Isotope Data","studyNotes":"Antarctic ice core ITASE-2000-1 sub-annual oxygen isotope (d18O) data for the past 330 years.","version":"1.0","xmlId":"20681"}