noaa-lake-19421 Lake Qinghai, China 32,000 Year Leaf Wax Hydrogen Isotope Data Thomas, E.K.; Huang, Y.; Clemens, S.C.; Colman, S.M.; Morrill, C.; Wegener, P.; Zhao, J. Lake Qinghai, China 32,000 Year Leaf Wax Hydrogen Isotope Data 2015-11-16 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19421 Investigator E.K. Thomas Investigator Y. Huang Investigator S.C. Clemens Investigator S.M. Colman Investigator C. Morrill Investigator P. Wegener Investigator J. Zhao earth science paleoclimate paleolimnology number of samples,null,null,null,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology depth at sample start,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 2H,C28 n-alkanoic acid,one standard deviation,per mil VSMOW,null,paleolimnology,corrected,isotope ratio mass spectrometry,N,C28 n-alkanoic acid earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,composited,null,N,null earth science paleoclimate paleolimnology notes,null,null,null,null,paleolimnology,null,null,C,null earth science paleoclimate paleolimnology delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,corrected,isotope ratio mass spectrometry,N,C28 n-alkanoic acid. Methyl hydrogen removed earth science paleoclimate paleolimnology depth at sample end,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology mass,dry sediment,null,meter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology notes,null,null,null,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology hydrogen isotopes geoscientificInformation Monsoon 31602 cal yr BP 24 cal yr BP Complete 37.058 37.058 100.303 100.303 3192 3192 Continent Asia Eastern Asia China Qinghai Lake Qinghai>LATITUDE 37.058>LONGITUDE 100.303 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Elizabeth K. Thomas, Yongsong Huang, Steven C. Clemens, Steven M. Colman, Carrie Morrill, Pamela Wegener, Jiangtao Zhao 2016 Quaternary Science Reviews 131 A 157-167 10.1016/j.quascirev.2015.11.003 http://www.sciencedirect.com/science/article/pii/S0277379115301694

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. STUDY NOTES: Hydrogen isotope (d2H) data of terrestrial leaf waxes from sediments collected in Lake Qinghai, China.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/china/qinghai2016d2h.txt Data File; Lake Qinghai Leaf Wax Hydrogen Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11