{"NOAAStudyId":"13181","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":"2012-08-06","dataPublisher":"NOAA","dataType":"OTHER COLLECTIONS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/other-collections","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-other-13181.xml","doi":null,"earliestYearBP":1590,"earliestYearCE":360,"entryId":"noaa-other-13181","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"ARC-0909285, ARC-090808, ARC-0909270"}],"investigators":"Lowell, T.V.; Hall, B.L.; Kelly, M.A.; Bennike, O.; Lusas, A.R.; Honsaker, W.; Smith, C.A.; Levy, L.B.; Travis, S.; Denton, G.H.","mostRecentYearBP":115,"mostRecentYearCE":1835,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13181","originalSource":null,"publication":[{"abstract":"The Greenland Ice Sheet is undergoing dynamic changes that will have global implications if they continue into the future. In this regard, an understanding of how the ice sheet responded to past climate changes affords a baseline for anticipating future behavior. Small, independent ice caps adjacent to the Greenland Ice Sheet (hereinafter called “local ice caps”) are sensitive indicators of the response of Greenland ice-marginal zones to climate change. Therefore, we reconstructed late Holocene ice-marginal fluctuations of the local Istorvet ice cap in east Greenland, using radiocarbon dates of subfossil plants, 10Be dates of surface boulders, and analyses of sediment cores from both threshold and control lakes. During the last termination, the Istorvet ice cap had retreated close to its maximum Holocene position by w11,730 cal yr BP. Radiocarbon dates of subfossil plants exposed by recent recession of the ice margin indicate that the Istorvet cap was smaller than at present from AD 200 to AD 1025. Sediments from a threshold lake show no glacial input until the ice cap advanced to within 365 m of its Holocene maximum position bywAD 1150. Thereafter the ice cap remained at or close to this position until at least AD 1660. The timing of this, the most extensive of the Holocene, expansion is similar to that recorded at some glaciers in the Alps and in southern Alaska. However, in contrast to these other regions, the expansion in east Greenland at AD 1150 appears to have been very close to, if not at, a maximum Holocene value. Comparison of the Istorvet ice-cap fluctuations with Holocene glacier extents in Southern Hemisphere middle-to-high latitude locations on the Antarctic Peninsula and in the Andes and the Southern Alps suggests an out-of-phase relationship. If correct, this pattern supports the hypothesis that a bipolar see-saw of oceanic and/or atmospheric circulation during the Holocene produced asynchronous glacier response at some localities in the two polar hemispheres.","author":{"name":"Lowell, Thomas V., Brenda L. Hall, Meredith A. Kelly, Ole Bennike, Amanda R. Lusas, William Honsaker, Colby A. Smith, Laura B. Levy, Scott Travis, and George H. Denton"},"citation":"Lowell, Thomas V., Brenda L. Hall, Meredith A. Kelly, Ole Bennike, Amanda R. Lusas, William Honsaker, Colby A. Smith, Laura B. Levy, Scott Travis, and George H. Denton. Late Holocene expansion of Istorvet ice cap, Liverpool Land, east Greenland. Quaternary Science Reviews, 63, 128-140, ISSN 0277-3791.","edition":null,"identifier":null,"issue":null,"journal":"Quaternary Science Reviews","pages":null,"pubRank":"1","pubYear":2013,"reportNumber":null,"title":"Late Holocene expansion of Istorvet ice cap, Liverpool Land, east Greenland","type":"publication","volume":"63"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57053","geo":{"geoType":"Feature","geometry":{"coordinates":["70.93","-22.15"],"type":"POINT"},"properties":{"easternmostLongitude":"-22.15","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"70.93","southernmostLatitude":"70.93","westernmostLongitude":"-22.15"}},"locationName":"Continent>North America>Greenland","mappable":"Y","paleoData":[{"NOAADataTableId":"32492","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/radiocarbon/istorvet2012c14.txt","linkText":"All Metadata and Data","urlDescription":"Text File","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/radiocarbon/istorvet2012c14.xls","linkText":"All Metadata and Data","urlDescription":"Excel File","variables":[]}],"dataTableName":"Istorvet2012","dataTableNotes":null,"earliestYear":1590,"earliestYearBP":1590,"earliestYearCE":360,"mostRecentYear":115,"mostRecentYearBP":115,"mostRecentYearCE":1835,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Istorvet Ice Cap"}],"studyCode":null,"studyName":"Istorvet Ice Cap, East Greenland Late Holocene Radiocarbon Ages","studyNotes":"Radiocarbon ages from subfossil plants collected on the western side of \nthe Istorvet ice cap, Liverpool Land, East Greenland. These radiocarbon \nages represent former plants growing at near the current margin of the \nice cap and thus represent the last time the ice cap was the same size \nor smaller than present.\n\nData include location, field label, dated material, NOSAMS number, d13C, \nAge, error, start AD, End AD, Relative area, Other Taxa, latitude, \nlongitude, and elevation. \n\nIstorvet Site Locations: 70.87 to 71.0°N, 21.17 to 22.28°W, 520 to 835m elev.   ","version":"1.0","xmlId":"11224"}