noaa-cave-19399 Qingtian and Hulu Caves, China Deglacial Stalagmite Stable Isotope Data Zhang, W.; Wu, J.; Wang, Y.; Wang, Y.; Cheng, H.; Kong, X.; Duan, F. Qingtian and Hulu Caves, China Deglacial Stalagmite Stable Isotope Data 2015-10-27 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19399 Investigator W. Zhang Investigator J. Wu Investigator Y. Wang Investigator Y. Wang Investigator H. Cheng Investigator X. Kong Investigator F. Duan earth science paleoclimate speleothems depth,null,null,millimeter,null,speleothems,null,null,N,null earth science paleoclimate speleothems age,null,null,calendar year before present,null,speleothems,null,null,N,null earth science paleoclimate speleothems delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null earth science paleoclimate speleothems delta 13C,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null earth science paleoclimate speleothems carbon isotopes earth science paleoclimate speleothems oxygen isotopes geoscientificInformation Monsoon 18332 cal yr BP 14439 cal yr BP Complete 31.3333 32.5 110.3667 119.16 1630 1630 Continent Asia Eastern Asia China Hulu Cave>LATITUDE 32.5>LONGITUDE 119.16 Continent Asia Eastern Asia China Qingtian Cave>LATITUDE 31.3333>LONGITUDE 110.3667 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 Weihong Zhang, Jiangying Wu, Yi Wang, Yongjin Wang, Hai Cheng, Xinggong Kong, Fucai Duan 2014 Quaternary Research 82 1 154-163 10.1016/j.yqres.2014.01.010 http://www.sciencedirect.com/science/article/pii/S0033589414000131

The 'Mystery Interval' (MI, 17.5-14.5 ka) was the first stage of the last deglaciation, a key interval for understanding mechanisms of glacial-interglacial cycles. To elucidate possible causes of the MI, here we present three high-resolution, precisely dated oxygen-isotope records of stalagmites from Qingtian and Hulu Caves in China, reflecting changes in the East Asian summer monsoon (EASM) then. Based on well-established chronologies using precise 230Th dates and annual-band counting results, the two-cave d18O profiles of ~ 7-yr resolution match well at decadal timescales. Both of the two-cave records document an abrupt weakening (2 per mil of d18O rise within 20 yr) in the EASM at ~ 16.1 ka, coinciding with the transition of the two-phased MI reconstructed from New Mexico's Lake Estancia. Our results indicate that the maximum southward displacement of the Intertropical Convergence Zone and associated southward shift of polar jet stream may generate this two-phase feature of the MI during that time. We also discover a linear relationship among decreasing EASM intensity, rising atmospheric CO2 and weakening Atlantic Meridional Overturning Circulation between the MI and Younger Dryas episodes, suggesting a strong coupling of atmospheric/oceanic circulations in response to the millennial-scale forcing, which in turn regulates global climate changes and carbon cycles. STUDY NOTES: Oxygen isotope (d18O) data from Qingtian and Hulu Caves, China plus carbon isotope (d13C) data from Hulu Cave, for the 'Mystery Interval' 17.5-14.5 ka.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/hulu2014yt16.1.txt Data File; Hulu Cave Stalagmite YT Detailed Monsoon Transtion at ~16.1 kyr B.P. GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/hulu2014yt.txt Data File; Hulu Cave Stalagmite YT d18O and d13C Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/qingtian2014qt29.txt Data File; Qingtian Cave Stalagmite Qt29 d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/qingtian2014qt20.txt Data File; Qingtian Cave Stalagmite Qt20 d18O Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11