{"xmlId":"13029","NOAAStudyId":"15228","studyName":"Renland, East Greenland Holocene Lake Sediment LOI Data","doi":"https://doi.org/10.25921/3kjc-zc58","uuid":"2ec806f4-b951-45ab-bd11-d0b9914bfeca","dataPublisher":"NOAA","contactInfo":{"type":"CONTACT INFORMATION","shortName":"DOC/NOAA/NESDIS/NCEI","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","address":"325 Broadway, E/NE31","city":"Boulder","state":"CO","postalCode":"80305-3328","country":"USA","dataCenterUrl":"https://www.ncei.noaa.gov/products/paleoclimatology","email":"paleo@noaa.gov","phone":"828-271-4800","fax":null,"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."},"dataType":"PALEOLIMNOLOGY","investigators":"Medford, A.; Hall, B.L.; Lowell, T.V.; Kelly, M.A.; Levy, L.B.; Wilcox, P.S.; Axford, Y.","investigatorDetails":[{"firstName":"Aaron","lastName":"Medford","initials":"A.","orcId":"0000-0003-2467-9399"},{"firstName":"Brenda","lastName":"Hall","initials":"B.L.","orcId":null},{"firstName":"Thomas","lastName":"Lowell","initials":"T.V.","orcId":"0000-0001-7826-0636"},{"firstName":"Meredith","lastName":"Kelly","initials":"M.A.","orcId":"0000-0001-8163-3907"},{"firstName":"Laura","lastName":"Levy","initials":"L.B.","orcId":"0000-0002-4617-8299"},{"firstName":"Paul","lastName":"Wilcox","initials":"P.S.","orcId":"0000-0003-4190-237X"},{"firstName":"Yarrow","lastName":"Axford","initials":"Y.","orcId":"0000-0002-8033-358X"}],"version":"1.0","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":null}],"studyNotes":"Loss-on-ignition data (550C burn) for 4 East Greenland lake sediment cores","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/15228","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-15228.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-lake-15228.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/lake","studyCode":null,"scienceKeywords":null,"reconstruction":"N","contributionDate":"2013-10-23","entryId":"noaa-lake-15228","earliestYearBP":12000,"mostRecentYearBP":0,"earliestYearCE":-10050,"mostRecentYearCE":1950,"publication":[{"author":{"name":"Medford, A., Hall, B., Lowell, T., Kelly, M., Levy, L., Wilcox, P., and Axford, Y."},"pubYear":2021,"title":"Holocene glacial history of Renland Ice Cap, East Greenland, reconstructed from lake sediments","journal":"Quaternary Science Reviews","volume":"258","edition":null,"issue":null,"pages":null,"reportNumber":"106883","citation":"Medford, A., Hall, B., Lowell, T., Kelly, M., Levy, L., Wilcox, P., and Axford, Y. 2021. Holocene glacial history of Renland Ice Cap, East Greenland, reconstructed from lake sediments. Quaternary Science Reviews, 258, 106883. doi: 10.1016/j.quascirev.2021.106883","type":"publication","identifier":{"type":"doi","id":"10.1016/j.quascirev.2021.106883","url":"http://dx.doi.org/10.1016/j.quascirev.2021.106883"},"abstract":"Shrinking glaciers, melting permafrost, and reduced sea ice all indicate rapid contraction of the Arctic cryosphere in response to present-day climate warming, a trajectory that is expected to continue, if not accelerate. The reaction of the Arctic cryosphere to past periods of climate variation can afford insight into its present and future behavior. Here, we examine a <12,000 year record of glacier fluctuations and meltwater variation associated with the Renland Ice Cap, East Greenland, that extends from the early Holocene thermal optimum through the cooling of the Little Ice Age to present. Sediment records from glacially fed lakes indicate rapid early Holocene deglaciation, with ice extent likely slightly smaller than at present by <9500 yr BP. Glacial activity resulted in occasional deposition of rock flour in the studied lakes in the early Holocene until at least <7500 yr BP. Rock flour is absent for much of the period <7000-4000 yr BP, suggesting ice extent generally was smaller than at present. However, thin layers of blue-gray clay throughout this period may indicate millennial-scale ice expansions, with Renland Ice Cap briefly reaching extents during cold phases that may have been similar to today. Glacial sediment deposition occurred again in the late Holocene at <32003400 yr BP and was followed by a brief glacial episode at <1340 yr BP and then a major event beginning shortly after <1050 yr BP. We infer that rock flour deposition in the lakes in the last millennium corresponds with advance of Renland glaciers to their Little Ice Age positions, marked by a fresh, gray drift limit. Radiocarbon dates of in situ plant remains adjacent to the present ice cap indicate a short relatively warm period <500 yr ago, when ice was within its AD 2011 limit, followed by glacier readvance. The general pattern of ice fluctuations in Renland is similar to that at other ice caps in the region, but also has important differences, including the preservation of a possible mid-Holocene record at times when lower-elevation ice caps in the Scoresby Sund region may have been absent. This finding reinforces the concept that examination of multiple geographic and geomorphologic settings is necessary for a full understanding of ice variations in a region.","pubRank":"1"}],"site":[{"NOAASiteId":"55589","siteName":"Bunny Lake","siteCode":null,"mappable":"Y","locationName":"Continent>North America>Greenland","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["71.03118","-27.42675"]},"properties":{"southernmostLatitude":"71.03118","northernmostLatitude":"71.03118","westernmostLongitude":"-27.42675","easternmostLongitude":"-27.42675","minElevationMeters":"819","maxElevationMeters":"819"}},"paleoData":[{"dataTableName":"BNL11-1A2014LOI","NOAADataTableId":"25215","earliestYear":8000,"mostRecentYear":0,"timeUnit":"cal yr 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