{"NOAAStudyId":"11148","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":"2011-04-29","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-11148.xml","doi":null,"earliestYearBP":11700,"earliestYearCE":-9750,"entryId":"noaa-icecore-11148","funding":[],"investigators":"Vinther, B.M.; Buchardt, S.L.; Clausen, H.B.; Dahl-Jensen, D.; Johnsen, S.J.; Fisher, D.A.; Koerner, R.M.; Raynaud, D.; Lipenkov, V.; Andersen, K.K.; Blunier, T.; Rasmussen, S.O.; Steffensen, J.P.; Svensson, A.M.","mostRecentYearBP":-10,"mostRecentYearCE":1960,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/11148","originalSource":null,"publication":[{"abstract":"On entering an era of global warming, the stability of the Greenland \nice sheet (GIS) is an important concern, especially in the light of \nnew evidence of rapidly changing flow and melt conditions at the GIS \nmargins. Studying the response of the GIS to past climatic change may \nhelp to advance our understanding of GIS dynamics. The previous \ninterpretation of evidence from stable isotopes (d18O) in water from \nGIS ice cores was that Holocene climate variability on the GIS differed \nspatially and that a consistent Holocene climate optimum - the unusually \nwarm period from about 9,000 to 6,000 years ago found in many northern \nlatitude palaeoclimate records - did not exist. Here we extract both \nthe Greenland Holocene temperature history and the evolution of GIS \nsurface elevation at four GIS locations. We achieve this by comparing \nd18O from GIS ice cores with d18O from ice cores from small marginal \nicecaps. Contrary to the earlier interpretation of d18O evidence from \nice cores, our new temperature history reveals a pronounced Holocene \nclimatic optimum in Greenland coinciding with maximum thinning near \nthe GIS margins. Our d18O-based results are corroborated by the air \ncontent of ice cores, a proxy for surface elevation. State-of-the-art \nice sheet models are generally found to be underestimating the extent \nand changes in GIS elevation and area; our findings may help to improve \nthe ability of models to reproduce the GIS response to Holocene climate.\n","author":null,"citation":"Vinther, B.M., S.L. Buchardt, H.B. Clausen, D. Dahl-Jensen, S.J. Johnsen, \nD.A. Fisher, R.M. Koerner, D. Raynaud, V. Lipenkov, K.K. Andersen, \nT. Blunier, S.O. Rasmussen, J.P. Steffensen, and A.M. Svensson. 2009. \nHolocene thinning of the Greenland ice sheet. \nNature, Vol. 461, pp. 385-388, 17 September 2009. \ndoi:10.1038/nature08355","edition":null,"identifier":{"id":"10.1038/nature08355","type":"doi","url":"http://dx.doi.org/10.1038/nature08355"},"issue":null,"journal":"Nature","pages":null,"pubRank":"1","pubYear":2009,"reportNumber":null,"title":"Holocene thinning of the Greenland ice sheet","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":null,"site":[{"NOAASiteId":"19973","geo":{"geoType":"Feature","geometry":{"coordinates":["72.58","-37.63"],"type":"POINT"},"properties":{"easternmostLongitude":"-37.63","maxElevationMeters":"2917","minElevationMeters":"1730","northernmostLatitude":"72.58","southernmostLatitude":"72.58","westernmostLongitude":"-37.63"}},"locationName":"Continent>North America>Greenland","mappable":"Y","paleoData":[{"NOAADataTableId":"19669","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice 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