noaa-lake-21991 Yanchi Lake, Northwest China 16,000 Year Geochemical Data Li, Y.; Wang, N.; Li, Z.; Zhou, X.; Zhang, C. Yanchi Lake, Northwest China 16,000 Year Geochemical Data 2017-03-14 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/21991 Investigator Y. Li Investigator N. Wang Investigator Z. Li Investigator X. Zhou Investigator C. Zhang earth science paleoclimate paleolimnology hydrogen,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null earth science paleoclimate paleolimnology grain size mean,sediment,null,micrometer,null,paleolimnology,null,laser particle size analysis,N,grain size volume weighted mean earth science paleoclimate paleolimnology grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,particles greater than 63um earth science paleoclimate paleolimnology dolomite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology grain size mean,sediment,null,micrometer,null,paleolimnology,null,laser particle size analysis,N,grain size surface weighted mean earth science paleoclimate paleolimnology quartz,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology calcite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology nitrogen,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null earth science paleoclimate paleolimnology sulfur,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null earth science paleoclimate paleolimnology carbon/sulfur,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,null earth science paleoclimate paleolimnology anorthite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology sample identification,null,null,null,null,paleolimnology,null,null,C,null earth science paleoclimate paleolimnology organic carbon,sediment,null,percent,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology magnetic susceptibility,sediment,null,dimensionless,null,paleolimnology,null,null,N,frequency-dependent magnetic susceptibility earth science paleoclimate paleolimnology grain size median,sediment,null,micrometer,null,paleolimnology,null,laser particle size analysis,N,null earth science paleoclimate paleolimnology aragonite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology calcium carbonate,sediment,null,percent,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology grain size mode,sediment,null,micrometer,null,paleolimnology,null,laser particle size analysis,N,null earth science paleoclimate paleolimnology albite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology gypsum,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology halite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology pH,sediment,null,dimensionless,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology chlorite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,clinochlore; ( Mg2.96 Fe1.55 Fe.136 Al1.275 ) ( Si2.622 Al1.376 O10 ) ( O H )8 earth science paleoclimate paleolimnology carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,total organic carbon/total nitrogen earth science paleoclimate paleolimnology grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,particles smaller than 4um earth science paleoclimate paleolimnology muscovite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology glauberite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology carbon,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null earth science paleoclimate paleolimnology magnetic susceptibility,sediment,null,unspecified unit,null,paleolimnology,null,null,N,low-frequency magnetic susceptibility earth science paleoclimate paleolimnology magnetic susceptibility,sediment,null,unspecified unit,null,paleolimnology,null,null,N,high-frequency magnetic susceptibility earth science paleoclimate paleolimnology mass magnetic susceptibility,sediment,null,unspecified unit,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology nitrogen/sulfur,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,null earth science paleoclimate paleolimnology grain size class,sediment,null,percent,null,paleolimnology,null,laser particle size analysis,N,particles between 4um and 63um earth science paleoclimate paleolimnology thenardite,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,null earth science paleoclimate paleolimnology orthoclase,sediment,null,percent,null,paleolimnology,null,x-ray diffraction,N,adularia; K ( Al Si3 O8 ) earth science paleoclimate paleolimnology physical properties earth science paleoclimate paleolimnology geochemistry earth science paleoclimate paleolimnology mineralogy geoscientificInformation 16277 cal yr BP 34 cal yr BP Complete 39.75 39.75 99.33 99.33 1200 1200 Continent Asia Eastern Asia China Yanchi Lake>LATITUDE 39.75>LONGITUDE 99.33 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 Yu Li, Nai'ang Wang, Zhuolun Li, Xuehua Zhou, Chengqi Zhang 2013 Journal of Geographical Sciences 23 5 932-946 10.1007/s11442-013-1053-3 https://link.springer.com/article/10.1007/s11442-013-1053-3

Modern climate research has shown that the Asian summer monsoon water vapor transport is limited to the eastern part of the Qilian Mountains. On the Holocene millennial-scale, whether the northwest boundary of the summer monsoon varies according to climate change is a key scientific issue. Yanchi Lake is located in the northern Qilian Mountains and the middle of the Hexi Corridor, where the modern climate is less affected by the Asian summer monsoon. It is a key research area for examining the long-term variations of the Asian summer monsoon. Paleoclimatic data, including AMS 14C dates of pollen concentrates and bulk organic carbon, lithology, grain-size, mineral composition and geochemical proxies were acquired from sediments of Yanchi Lake. The chronological results show that the lower part of the lacustrine section is formed mainly in the Late Glacial and early Holocene period, while the proxies' data indicate the lake expansion is associated with high content of mineral salts. The middle part of this section is formed during the transitional period of the early and middle Holocene. Affected by the reworking effect, the pollen concentrates AMS 14C dates from the middle part of the section are generally older than those from the lower part. Since the mid-Holocene, Yanchi Lake retreated significantly and the deposition rate dropped obviously. The Yanchi Lake record is consistent with the Late Glacial and Holocene lake records in the Qinghai-Tibet Plateau and the climatic records in typical monsoon domain, which indicate the lake expansion and the strong Asian summer monsoon during the Late Glacial and early Holocene. The long-term monsoonal pattern is different from the lake evolution in Central Asia on the Holocene millennial-scale. This study proves the monsoon impacts on the northwestern margin of the summer monsoon, and also proves the fact that the northern boundary of the summer monsoon moves according to millennial-scale climate change. STUDY NOTES: Geochemical and physical properties data from sediments collected in Yanchi Lake, Northwest China for the past 16,000 years.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/china/yanchi2013mineral.txt Formatted Text Data File; Yanchi Lake Mineral Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/china/yanchi2013gs.txt Formatted Text Data File; Yanchi Lake Grain Size Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/china/yanchi2013geochem.txt Formatted Text Data File; Yanchi Lake Geochemical Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11