{"NOAAStudyId":"13079","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-13079.xml","doi":null,"earliestYearBP":12294,"earliestYearCE":-10344,"entryId":"noaa-lake-13079","funding":[],"investigators":"Wooller, M.J.; Kurek, J.; Gaglioti, B.V.; Cwynar, L.C.; Bigelow, N.H.; Reuther, J.D.; Gelvin-Reymiller, C.; Smol, J.P.","mostRecentYearBP":777,"mostRecentYearCE":1173,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13079","originalSource":null,"publication":[{"abstract":"Wetlands and lakes in the Tanana Valley, Alaska, have provided \r\nimportant resources for prehistoric humans who inhabited this \r\nregion. We examine an ~11,200 cal yr BP record of environmental \r\nand paleolimnological changes from Quartz Lake in the middle \r\nTanana Valley. Our data are also presented in the context of \r\nrecent archaeological findings in the lake's general vicinity \r\nthat have 18 associated AMS 14C dates. We analyzed the stable-\r\ncarbon and nitrogen isotope composition of total organic matter \r\nfrom the core, coupled with oxygen and carbon isotope analyses \r\nof Pisidiidae shells (fingernail clams), in addition to chironomid \r\nassemblage changes. Lacustrine sediments began to accumulate at \r\n~11,200 cal yr BP. Initially, autochthonous production was low \r\nand allochthonous organic input was negligible between 11,000 \r\nand 10,500 cal yr BP, and were associated with relatively cool \r\nconditions at Quartz Lake at ~10,700 cal yr BP. After 10,500 \r\ncal yr BP, autochthonous production was higher coincident with \r\na shift to chironomid assemblages dominated by taxa associated \r\nwith warmer summer climates. A decrease in d13C values of total \r\norganic carbon (TOC) and organic content of the sediment between \r\n9,000 and 4,000 cal yr BP may indicate declining autochthonous \r\nprimary production. This period ended with an abrupt (~7 ‰) \r\ndecrease in the d18O values from Pisidiidae shells at ~3,000 \r\ncal yr BP, which we hypothesize represented an episodic \r\nconnection (flood) of the lake with flow from the nearby \r\n(~6 km) Tanana River. Our findings coincide with evidence for \r\nmajor flooding at other locations connected to the Tanana River \r\nand further afield in Alaska. From ~3,000 cal yr BP Quartz Lake \r\nsubsequently appeared to become a relatively closed system, \r\nas indicated by the d18OPisidiidae and d13CPisidiidae data \r\nthat are positively correlated and generally higher, \r\nwhich also correlates with a shift to moderately higher \r\nabundances of littoral chironomids. The cause of the transition \r\nto closed-basin conditions may have been geomorphic rather than \r\nclimatic. This evidence of a progressively stronger evaporative \r\ninfluence on the lake's closed hydrology after ~3,000 cal yr BP \r\nis consistent with our modern d18O and dD water data from Quartz \r\nLake that plot along a regional evaporative line we base on \r\nisotopic measurements from other local lakes and rivers. ","author":null,"citation":"Wooller, M.J., J. Kurek, B.V. Gaglioti, L.C. Cwynar, N. Bigelow, \r\nJ.D. Reuther, C. Gelvin-Reymiller, and J.P. Smol. 2012. \r\nAn ~11,200 year paleolimnological perspective for emerging \r\narchaeological findings at Quartz Lake, Alaska. \r\nJournal of Paleolimnology, Vol. 48, No. 1, June 2012, pp. 83-99. \r\nDOI: 10.1007/s10933-012-9610-9 ","edition":null,"identifier":{"id":"10.1007/s10933-012-9610-9","type":"doi","url":"http://dx.doi.org/10.1007/s10933-012-9610-9"},"issue":null,"journal":"Journal of Paleolimnology","pages":null,"pubRank":"1","pubYear":2012,"reportNumber":null,"title":"An ~11,200 year paleolimnological perspective for emerging  archaeological findings at Quartz Lake, Alaska","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":["Arctic","PAGES Arctic 2k"],"site":[{"NOAASiteId":"53157","geo":{"geoType":"Feature","geometry":{"coordinates":["64.2133","-145.8211"],"type":"POINT"},"properties":{"easternmostLongitude":"-145.8211","maxElevationMeters":"293","minElevationMeters":"293","northernmostLatitude":"64.2133","southernmostLatitude":"64.2133","westernmostLongitude":"-145.8211"}},"locationName":"Continent>North America>United States Of America>Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"22533","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry","earth science>paleoclimate>paleolimnology>oxygen isotopes","earth science>paleoclimate>paleolimnology>population abundance","earth science>paleoclimate>paleolimnology>carbon isotopes","earth 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