{"NOAAStudyId":"18135","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":"2008-11-01","dataPublisher":"NOAA","dataType":"PALEOLIMNOLOGY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/lake","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-18135.xml","doi":null,"earliestYearBP":21000,"earliestYearCE":-19050,"entryId":"noaa-lake-18135","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OPP"}],"investigators":"Christoffersen, P.; Tulaczyk, S.; Wattrus, N.; Peterson, J.; Quintana-Krupinski, N.; Clark, C.D.; Sjunneskog, C.","mostRecentYearBP":0,"mostRecentYearCE":1950,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/18135","originalSource":null,"publication":[{"abstract":"Subglacial lakes identified beneath the Antarctic Ice Sheet belong to a rare category of unexplored environments on Earth's surface. The key to understanding the origin and longevity of subglacial lakes is likely contained in their sedimentary sequences. Here we explore the nature of a sedimentary succession in a deep tectonic trough identified as a prime candidate for a large subglacial paleolake. The trough is the 100-km-long, 620-m-deep Christie Bay, located in the east arm of the Great Slave Lake, Canada. High-resolution seismic reflection data and short sediment cores collected in the deep trough show a 150-m-thick sequence of fine-grained sedimentary lake fill separating glacial ice-contact deposits from draped Holocene lake sediments. We interpret this sequence to consist of sediments that accumulated in a subglacial lake that covered an area larger than 130 km2. The inferred presence of a subglacial paleolake is supported by results from hydrologic modeling of drainage pathways beneath the Laurentide Ice Sheet during the last glacial maximum. Our data point toward the existence of a dynamic subglacial lake environment where sediments were delivered by discharge of meltwater from a subglacial water system. A core sample of the sedimentary lake fill in Christie Bay may elucidate whether living organisms exist in subglacial lakes.","author":{"name":"Poul Christoffersen, Slawek Tulaczyk, Nigel J. Wattrus, Justin Peterson, Nadine Quintana-Krupinski, Chris D. Clark, and Charlotte Sjunneskog\r\n"},"citation":"Poul Christoffersen, Slawek Tulaczyk, Nigel J. Wattrus, Justin Peterson, Nadine Quintana-Krupinski, Chris D. Clark, and Charlotte Sjunneskog\r\n. 2008. Large subglacial lake beneath the Laurentide Ice Sheet inferred from sedimentary sequences. Geology, 36(7), 563-566. doi: 10.1130/G24628A.1","edition":null,"identifier":{"id":"10.1130/G24628A.1","type":"doi","url":"http://dx.doi.org/10.1130/G24628A.1"},"issue":"7","journal":"Geology","pages":"563-566","pubRank":"1","pubYear":2008,"reportNumber":null,"title":"Large subglacial lake beneath the Laurentide Ice Sheet inferred from sedimentary sequences","type":"publication","volume":"36"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"56481","geo":{"geoType":"Feature","geometry":{"coordinates":["61.6667","-114"],"type":"POINT"},"properties":{"easternmostLongitude":"-114","maxElevationMeters":"156","minElevationMeters":"156","northernmostLatitude":"61.6667","southernmostLatitude":"61.6667","westernmostLongitude":"-114"}},"locationName":"Continent>North America>Canada>Northwest Territories","mappable":"Y","paleoData":[{"NOAADataTableId":"28474","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/nwt/gsl/seismic/","linkText":"Christoffersen et al. 2008 Great Slave Lake Seismic Reflection Data","urlDescription":"Data Folder","variables":[]}],"dataTableName":"Christoffersen2008seismic","dataTableNotes":null,"earliestYear":21000,"earliestYearBP":21000,"earliestYearCE":-19050,"mostRecentYear":0,"mostRecentYearBP":0,"mostRecentYearCE":1950,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Great Slave Lake"}],"studyCode":null,"studyName":"Great Slave Lake High-Resolution Seismic Reflection Data","studyNotes":"High-resolution seismic reflection profile data from Christie Bay, Great Slave Lake, Northwest Territories, Canada. ","version":"1.0","xmlId":"15817"}