{"NOAAStudyId":"10750","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":"2011-04-06","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-10750.xml","doi":null,"earliestYearBP":962,"earliestYearCE":988,"entryId":"noaa-lake-10750","funding":[{"fundingAgency":"US Geological Survey","fundingGrant":null},{"fundingAgency":"US National Science Foundation","fundingGrant":"ATM-0097127, ARC-0909310"}],"investigators":"Anderson, L.; Finney, B.P.; Shapley, M.D.","mostRecentYearBP":-49,"mostRecentYearCE":1999,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/10750","originalSource":null,"publication":[{"abstract":"A 1000-yr history of climate change in the central Yukon Territory, \nCanada, is inferred from sediment composition and isotope geochemistry \nfrom small, groundwater fed, Seven Mile Lake. Recent observations of \nlake-water d18O, lake level, river discharge, and climate variations, \nsuggest that changes in regional effective moisture (precipitation \nminus evaporation) are reflected by the lake's hydrologic balance. \nThe observations indicate that the lake is currently 18O-enriched \nby summer evaporation and that during years of increased precipitation, \nwhen groundwater inflow rates to the lake increase, lakewater d18O \nvalues decrease. Past lake-water d18O values are inferred from oxygen \nisotope ratios of fine-grained sedimentary endogenic carbonate. \nVariations in carbonate d18O, supplemented by those in carbonate and \norganic d13C, C/N ratios, and organic carbon, carbonate and biogenic \nsilica accumulation rates, document changes in effective moisture at \ndecadal time scales during the early Little Ice Age period to present. \nResults indicate that between ~AD 1000 and 1600, effective moisture \nwas higher than today. A shift to more arid climate conditions \noccurred after ~AD 1650. The 19th and 20th centuries have been the \ndriest of the past millennium. Temporal variations correspond with \ninferred shifts in summer evaporation from Marcella Lake d18O, \na similarly small, stratified, alkaline lake located ~250 km to the \nsouthwest, suggesting that the combined reconstructions accurately \ndocument the regional paleoclimate of the east-central interior. \nComparison with regional glacial activity suggests differing regional \nmoisture patterns during early and late Little Ice Age advances. \n\n","author":null,"citation":"Anderson, L., B.P. Finney, and M.D. Shapley. 2011. \nLake carbonate d18O records from the Yukon Territory, Canada: \nLittle Ice Age moisture variability and patterns. \nQuaternary Science Reviews, Vol. 30, Issues 7-8, April 2011, \npp. 887-898.  doi:10.1016/j.quascirev.2011.01.005 \n","edition":null,"identifier":{"id":"10.1016/j.quascirev.2011.01.005","type":"doi","url":"http://dx.doi.org/10.1016/j.quascirev.2011.01.005"},"issue":null,"journal":"Quaternary Science Reviews","pages":null,"pubRank":"1","pubYear":2011,"reportNumber":null,"title":"Lake carbonate d18O records from the Yukon Territory, Canada:  Little Ice Age moisture variability and patterns","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["Little Ice Age (LIA)","hydrology"],"site":[{"NOAASiteId":"37361","geo":{"geoType":"Feature","geometry":{"coordinates":["62.17916","-136.38323"],"type":"POINT"},"properties":{"easternmostLongitude":"-136.38323","maxElevationMeters":"520","minElevationMeters":"520","northernmostLatitude":"62.17916","southernmostLatitude":"62.17916","westernmostLongitude":"-136.38323"}},"locationName":"Continent>North America>Canada>Yukon Territory","mappable":"Y","paleoData":[{"NOAADataTableId":"19459","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/seven-mile2011.txt","linkText":"seven-mile2011.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":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/seven-mile2011.xls","linkText":"seven-mile2011.xls","urlDescription":"Data","variables":[]}],"dataTableName":"GL199","dataTableNotes":null,"earliestYear":962,"earliestYearBP":962,"earliestYearCE":988,"mostRecentYear":-49,"mostRecentYearBP":-49,"mostRecentYearCE":1999,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Seven Mile Lake"}],"studyCode":null,"studyName":"Seven Mile Lake, Yukon 1000 Year Oxygen Isotope Data","studyNotes":"High resolution sediment d18O data from Seven Mile Lake, \nYukon covering the last 1000 years. \n\nCarbonate d18O ratios of 32um bulk sediment size fraction \nfrom continuous intervals of 0.5 cm from 0 to 55.5 cm depth.  \nIntervals of low percent carbonate (and corresponding isotope \ndata gaps) are interpreted as dry periods. \n","version":"1.0","xmlId":"9313"}