{"NOAAStudyId":"13076","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":"2012-06-30","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-13076.xml","doi":null,"earliestYearBP":11326,"earliestYearCE":-9376,"entryId":"noaa-lake-13076","funding":[],"investigators":"Finney, B.P.; Bigelow, N.H.; Barber, V.A.; Edwards, M.E.","mostRecentYearBP":-42,"mostRecentYearCE":1992,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13076","originalSource":null,"publication":[{"abstract":"Opal, organic C and N contents, and organic d13C and d15N stable \r\nisotopes were analyzed on a sedimentary sequence spanning the past \r\n~12,000 years from Dune Lake, a shallow groundwater-fed lake in the \r\nboreal forest region of central interior Alaska. The chronology, \r\nbased on 210Pb and 15 AMS radiocarbon dates on terrestrial materials, \r\nindicates that 5 m of biogenic sediment accumulated following dune \r\nstabilization at ~10,000 cal yr BP. Previous studies on lake level \r\nand pollen were synthesized with these data to assess Holocene changes \r\nin hydrogeology and climate. Variability in groundwater level and flux \r\nhas a strong control on lake level and are negatively correlated with \r\nthe d13C of organic matter produced within the lake. This relationship \r\nresults from the input of groundwater with high pCO2 and with dissolved \r\ninorganic carbon depleted in 13C, which subsequently affects lake \r\nphytoplankton d13C signatures. A rapid rise in lake level between \r\nca. 11,000 and 9,500 cal yr BP coincided with stabilization of the dune \r\nfield adjacent to the lake and expansion of vegetation around the lake, \r\nincluding white spruce. Organic d13C values are relatively low \r\nand constant between about 10,000 and 6,000 cal yr BP, and then \r\nsteadily increase until about 2,000 cal yr BP, suggesting a pattern \r\nof high followed by dropping lake levels generally consistent with \r\nresults from core-transect studies. Higher-frequency fluctuations \r\nof 2–3 ‰ in d13C are common, and suggest variability in aspects \r\nof the lake-carbon cycle over multi-decadal timescales. Recent trends \r\nin groundwater and lake level, river discharge, and precipitation \r\nsuggest an important role for wintertime precipitation in the regional \r\ngroundwater system. The unusual hydrology of this system relative to \r\nmost other lakes studied for paleoclimate in this region provides \r\na novel insight into different seasonal aspects of Alaskan \r\npaleoclimatology. The record is consistent with a general long-term \r\ndecrease in wintertime precipitation, possibly accompanied by an \r\nincrease in permafrost extent, over the Holocene.  \r\n","author":null,"citation":"Finney, B.P., N.H. Bigelow, V.A. Barber, and M.E. Edwards. 2012. \r\nHolocene climate change and carbon cycling in a groundwater-fed, \r\nboreal forest lake: Dune Lake, Alaska. \r\nJournal of Paleolimnology, Vol. 48, No. 1, June 2012, pp. 43-54.  \r\nDOI: 10.1007/s10933-012-9617-2","edition":null,"identifier":{"id":"10.1007/s10933-012-9617-2","type":"doi","url":"http://dx.doi.org/10.1007/s10933-012-9617-2"},"issue":null,"journal":"Journal of Paleolimnology","pages":null,"pubRank":"1","pubYear":2012,"reportNumber":null,"title":"Holocene climate change and carbon cycling in a groundwater-fed,  boreal forest lake: Dune Lake, Alaska","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["carbon cycle","Arctic","PAGES Arctic 2k"],"site":[{"NOAASiteId":"53154","geo":{"geoType":"Feature","geometry":{"coordinates":["64.42","-149.9"],"type":"POINT"},"properties":{"easternmostLongitude":"-149.9","maxElevationMeters":"134","minElevationMeters":"134","northernmostLatitude":"64.42","southernmostLatitude":"64.42","westernmostLongitude":"-149.9"}},"locationName":"Continent>North America>United States Of America>Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"22530","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>carbon isotopes","earth science>paleoclimate>paleolimnology>geochemistry","earth science>paleoclimate>paleolimnology>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/dune2012.txt","linkText":"dune2012.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>sample identification"},{"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":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age 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isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/dune2012.xls","linkText":"dune2012.xls","urlDescription":"Data","variables":[]}],"dataTableName":"DuneAF","dataTableNotes":null,"earliestYear":11326,"earliestYearBP":11326,"earliestYearCE":-9376,"mostRecentYear":-42,"mostRecentYearBP":-42,"mostRecentYearCE":1992,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Dune Lake AK"}],"studyCode":null,"studyName":"Dune Lake, Alaska 12,000 Year Multiproxy Sediment Data","studyNotes":"Multiproxy sediment data from Dune Lake, Alaska, for the past 12,000 years. \nDune Lake is a shallow, closed basin, groundwater-fed lake located in \nthe boreal forest of central Alaska. Paleoenvironmental proxies measured \ninclude Opal, organic C and N contents, and organic d13C and d15N stable isotopes. ","version":"1.0","xmlId":"11118"}