{"NOAAStudyId":"13094","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-13094.xml","doi":null,"earliestYearBP":14400,"earliestYearCE":-12450,"entryId":"noaa-lake-13094","funding":[],"investigators":"Irvine, F.; Cwynar, L.C.; Vermaire, J.C.; Rees, A.B.H.","mostRecentYearBP":0,"mostRecentYearCE":1950,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13094","originalSource":null,"publication":[{"abstract":"Two cores from Trout Lake, northern Yukon, yielded quantitative \r\nestimates of summer air temperatures using fossil midge larvae. \r\nWarming began around 14,400 cal yr BP, with inferred mean July \r\nair temperatures reaching values warmer than present by 12,800 \r\ncal yr BP. A 1°C cooling from 12,200 to 11,200 cal yr BP closely \r\ncorresponds with the Younger Dryas chronozone. A broad temperature \r\nmaximum occurred between 10,800 and 9,800 cal yr BP, with mean July \r\nair temperature about 2.2 °C warmer than present. This represents \r\nan early Holocene thermal maximum and coincides with increased \r\norganic content of the sediment. Both the shallow- and deep-water \r\ncores show similar temperature trends for their overlapping periods. \r\nThe inferred rise in mean July air temperature at 14,200 cal yr BP \r\ncoincides with a shift in vegetation from an herb- to shrub-\r\ndominated landscape. In contrast, the increase in Alnus pollen \r\nat 6,400 cal yr BP does not coincide with a change in temperature, \r\nbut may be a response to a rise in precipitation. \r\n","author":null,"citation":"Irvine, F., L.C. Cwynar, J.C. Vermaire, and A.B.H. Rees. 2012. \r\nMidge-inferred temperature reconstructions and vegetation change \r\nover the last ~15,000 years from Trout Lake, northern Yukon \r\nTerritory, eastern Beringia. \r\nJournal of Paleolimnology, Vol. 48, No. 1, June 2012, pp. 133-146. \r\nDOI: 10.1007/s10933-012-9612-7","edition":null,"identifier":{"id":"10.1007/s10933-012-9612-7","type":"doi","url":"http://dx.doi.org/10.1007/s10933-012-9612-7"},"issue":null,"journal":"Journal of Paleolimnology","pages":null,"pubRank":"1","pubYear":2012,"reportNumber":null,"title":"Midge-inferred temperature reconstructions and vegetation change  over the last ~15,000 years from Trout Lake, northern Yukon  Territory, eastern Beringia","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["PAGES 2k Network","PAGES Arctic 2k"],"site":[{"NOAASiteId":"53172","geo":{"geoType":"Feature","geometry":{"coordinates":["68.828","-138.75"],"type":"POINT"},"properties":{"easternmostLongitude":"-138.75","maxElevationMeters":"150","minElevationMeters":"150","northernmostLatitude":"68.828","southernmostLatitude":"68.828","westernmostLongitude":"-138.75"}},"locationName":"Continent>North America>Canada>Yukon Territory","mappable":"Y","paleoData":[{"NOAADataTableId":"22548","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties","earth science>paleoclimate>paleolimnology>reconstruction","earth science>paleoclimate>paleolimnology>population abundance"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/trout2012.txt","linkText":"trout2012.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":"Psectrocladius sp. 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