{"NOAAStudyId":"19421","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":"2015-11-16","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-19421.xml","doi":null,"earliestYearBP":31602,"earliestYearCE":-29652,"entryId":"noaa-lake-19421","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"EAR-0602412, ATM-0902805"},{"fundingAgency":"National Science Foundation of China ","fundingGrant":null}],"investigators":"Thomas, E.K.; Huang, Y.; Clemens, S.C.; Colman, S.M.; Morrill, C.; Wegener, P.; Zhao, J.","mostRecentYearBP":24,"mostRecentYearCE":1926,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/19421","originalSource":null,"publication":[{"abstract":"Lake Qinghai, located on the northeastern Tibetan Plateau north of the modern maximum summer monsoon extent, is well situated to record northward advances of the summer monsoon. Existing paleoclimate records contain conflicting evidence for the timing of summer monsoon advance into this region: an early arrival pre-Younger Dryas or a late arrival at the beginning of the Holocene. A 30-kyr-long leaf wax hydrogen isotope (n-alkanoic acid, d2Hwax) record from Lake Qinghai helps to address this discrepancy by elucidating changes in the three main moisture sources in this region: southerly (summer monsoon), northwesterly, and local precipitation. Lake Qinghai d2Hwax indicates that the arid glacial period was dominated by northwesterly moisture. Extremely arid conditions prevailed from 15 to 14 ka, likely because westerly winds were weakening and the summer monsoon had not yet reached this region. This arid period ended by 13.6 ka when small amounts of summer monsoon precipitation reached Lake Qinghai. Summer monsoon moisture subsequently retreated off of the northeastern Tibetan Plateau during the Younger Dryas and re-advanced in the early Holocene. Summer monsoon precipitation decreased progressively throughout the Holocene in response to decreasing summer insolation, and the modern northwesterly- and local-dominated moisture regime was attained ca. 2.6 ka. Lake Qinghai d2Hwax demonstrates that the summer monsoon extent was dynamic during the past 30 kyr, responding dramatically to insolation and North Atlantic circulation changes. Moreover, Lake Qinghai d2Hwax demonstrates that local and northwesterly air masses are important moisture sources to the northeastern Tibetan Plateau, and should be considered when reconstructing past hydroclimate in this region.","author":{"name":"Elizabeth K. Thomas, Yongsong Huang, Steven C. Clemens, Steven M. Colman, Carrie Morrill, Pamela Wegener, Jiangtao Zhao"},"citation":"Elizabeth K. Thomas, Yongsong Huang, Steven C. Clemens, Steven M. Colman, Carrie Morrill, Pamela Wegener, Jiangtao Zhao. 2016. Changes in dominant moisture sources and the consequences for hydroclimate on the northeastern Tibetan Plateau during the past 32 kyr. Quaternary Science Reviews, 131(A), 157-167. doi: 10.1016/j.quascirev.2015.11.003","edition":null,"identifier":{"id":"10.1016/j.quascirev.2015.11.003","type":"doi","url":"http://dx.doi.org/10.1016/j.quascirev.2015.11.003"},"issue":"A","journal":"Quaternary Science Reviews","pages":"157-167","pubRank":"1","pubYear":2016,"reportNumber":null,"title":"Changes in dominant moisture sources and the consequences for hydroclimate on the northeastern Tibetan Plateau during the past 32 kyr","type":"publication","volume":"131"}],"reconstruction":"N","scienceKeywords":["Monsoon"],"site":[{"NOAASiteId":"20682","geo":{"geoType":"Feature","geometry":{"coordinates":["37.058","100.303"],"type":"POINT"},"properties":{"easternmostLongitude":"100.303","maxElevationMeters":"3192","minElevationMeters":"3192","northernmostLatitude":"37.058","southernmostLatitude":"37.058","westernmostLongitude":"100.303"}},"locationName":"Continent>Asia>Eastern Asia>China>Qinghai","mappable":"Y","paleoData":[{"NOAADataTableId":"29998","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>hydrogen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/china/qinghai2016d2h.txt","linkText":"Lake Qinghai Leaf Wax Hydrogen Isotope Data ","urlDescription":"Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"C28 n-alkanoic acid","cvDataType":"PALEOLIMNOLOGY","cvDetail":"corrected","cvError":"one standard deviation","cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>fatty acid>n-alkanoic acid>C28 n-alkanoic acid","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":"C28 n-alkanoic acid. 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