{"NOAAStudyId":"9899","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":"2010-10-03","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-9899.xml","doi":null,"earliestYearBP":12236,"earliestYearCE":-10286,"entryId":"noaa-lake-9899","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OPP-9529940, EAR-9808593"}],"investigators":"Axford, Y.; Kaufman, D.S.","mostRecentYearBP":0,"mostRecentYearCE":1950,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/9899","originalSource":null,"publication":[{"abstract":"Multiproxy data from Little Swift Lake, an alpine lake in southwestern \nAlaska, provide evidence for pronounced late glacial and Holocene \nenvironmental change. An alpine glacier upvalley of Little Swift Lake \nretreated following the Younger Dryas chronozone, as evidenced by \nsedimentological changes in the lake record. Glacier retreat was \naccompanied by local and regional vegetation changes, including the \nexpansion of Betula and contraction of Cyperaceae, in response to \nclimatic amelioration. Warm, moist conditions between ~9800 and 8000 \ncal yr B.P. supported abundant Betula shrubs and high lake and \nwatershed productivity. Alnus rapidly expanded near Little Swift Lake \nwhile the region cooled between 8000 and 7500 cal yr B.P. \nEnvironmental changes at Little Swift Lake appear to have been roughly \nsynchronous with similar changes elsewhere in southwestern Alaska, \nbut late glacial and Holocene changes in other parts of Alaska were \ndifferent in nature and timing. The complex spatial and temporal \npatterns of late glacial and Holocene environmental change throughout \nAlaska point to the importance of local and regional-scale factors, \nespecially controls on moisture availability, as modulators of \nsite-specific responses to hemispheric- and global-scale climate forcing. \n","author":null,"citation":"Axford, Y. and D.S. Kaufman. 2004. \nLate Glacial and Holocene Glacier and Vegetation Fluctuations \nat Little Swift Lake, Southwestern Alaska, U.S.A. \nArctic, Antarctic, and Alpine Research, Vol. 36, No. 2, pp. 139-146. \n","edition":null,"identifier":null,"issue":null,"journal":"Arctic, Antarctic, and Alpine Research","pages":null,"pubRank":"1","pubYear":2004,"reportNumber":null,"title":"Late Glacial and Holocene Glacier and Vegetation Fluctuations  at Little Swift Lake, Southwestern Alaska, U.S.A.","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"31512","geo":{"geoType":"Feature","geometry":{"coordinates":["60.2144","-159.7658"],"type":"POINT"},"properties":{"easternmostLongitude":"-159.7658","maxElevationMeters":"572","minElevationMeters":"572","northernmostLatitude":"60.2144","southernmostLatitude":"60.2144","westernmostLongitude":"-159.7658"}},"locationName":"Continent>North America>United States Of America>Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"18748","coreLengthMeters":1,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties","earth science>paleoclimate>paleolimnology>magnetic susceptibility","earth science>paleoclimate>paleolimnology>population abundance","earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/little-swift2004.txt","linkText":"little-swift2004.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological 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material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"gram per cubic centimeter","cvWhat":"physical property>density"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"loss on ignition","cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"biological material>bulk biological material>organic matter"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"magnetic susceptibility measurement with ring or loop sensor","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless (CGS system)","cvWhat":"magnetic property>magnetic moments>magnetic susceptibility>volume magnetic susceptibility"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"inductively-coupled plasma atomic emission spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"chemical composition>compound>inorganic compound>silicon dioxide"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry","earth science>paleoclimate>paleolimnology>magnetic susceptibility","earth science>paleoclimate>paleolimnology>population abundance","earth science>paleoclimate>paleolimnology>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/little-swift2004.xls","linkText":"little-swift2004.xls","urlDescription":"Data","variables":[]}],"dataTableName":"LS-A","dataTableNotes":"core LS-A recovered from Little Swift Lake, Alaska in summer of 1998.","earliestYear":12236,"earliestYearBP":12236,"earliestYearCE":-10286,"mostRecentYear":0,"mostRecentYearBP":0,"mostRecentYearCE":1950,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Little Swift Lake"}],"studyCode":null,"studyName":"Little Swift Lake, Alaska 12KYr Multiproxy Sediment Data","studyNotes":"Multiproxy sediment data covering the last 12,000 years from \nLittle Swift Lake, southwest Alaska.  Data include major-element \ngeochemistry, grain size measurements, loss on ignition, \nmagnetic susceptibility, and pollen counts.  Core LS-A, \na 575-cm-long sediment core, was recovered from Little Swift Lake \nin 14.7 m of water in summer 1998. \n\nThe lake is 24 m deep and has 0.7 km2 surface area. \n\n","version":"1.0","xmlId":"8791"}