noaa-cave-19924 Wanxiang Cave, China 310,000 Year Speleothem Oxygen Isotope Data Johnson, K.R.; Ingram, B.L.; Sharp, W.D.; Zhang, P.Z. Wanxiang Cave, China 310,000 Year Speleothem Oxygen Isotope Data 2016-03-23 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19924 Investigator K.R. Johnson Investigator B.L. Ingram Investigator W.D. Sharp Investigator P.Z. Zhang earth science paleoclimate speleothems depth,null,null,millimeter,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 age,null,null,calendar kiloyear before present,null,speleothems,null,null,N,null earth science paleoclimate speleothems oxygen isotopes geoscientificInformation Monsoon 310190 cal yr BP 11900 cal yr BP Complete 33.316 33.316 105 105 1200 1200 Continent Asia Eastern Asia China Wanxiang Cave>LATITUDE 33.316>LONGITUDE 105 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 Kathleen R. Johnson, B. Lynn Ingram, Warren D. Sharp, Pingzhong Zhang 2006 Palaeogeography, Palaeoclimatology, Palaeoecology 236 1-2 5-19 10.1016/j.palaeo.2005.11.041 http://www.sciencedirect.com/science/article/pii/S0031018206001295

Speleothems from Wanxiang Cave, China (33°19'N, 105°00'E), located near the northern limit of the East Asian summer monsoon, provide high-resolution records of paleomonsoon variability. We present a simple model for interpreting d18O shifts in speleothems from this region in which the d18O of speleothem calcite is inversely related to monsoon intensity. In contrast to observations at higher latitudes, atmospheric temperature has little effect on d18O of precipitation near Wanxiang Cave. Furthermore, the temperature dependence of calcite-water d18O fractionation acts in the opposite sense, most likely canceling out the effect of local temperature variations on speleothem d18O. Given this, the maximum d18O shift that could occur due only to changes in the composition of the oceanic source region, the amount of rainfall, and the amount of evaporation between full glacial conditions with a weak summer monsoon and full interglacial conditions with a strong summer monsoon is 5.5per mil. Accordingly, it is necessary to invoke changes in past atmospheric circulation patterns and in the ratio of summer to winter precipitation to explain the nearly 7per mil range observed in fossil Wanxiang Cave speleothems. Two stalagmites, WXSM 51 and WXSM 52, exhibit more positive d18O during stadial periods (marine isotope stages [MIS] 8, 6, 5d, 5b, and 2) than during interstadial periods (MIS 9, 5a, 5c, 5e). Thus, East Asian summer monsoon intensity is generally decreased during globally cooler periods and increased during globally warmer periods. We present detailed d18O records from MIS 5a-5b and 5c-5d. During the MIS 5d-5c transition, summer monsoon intensity increased steadily from 117.6 ka, with a peak in intensity occurring at 106.8 ka, concurrent with Greenland Interstadial 24. During the MIS 5b-5a transition, monsoon intensity increased abruptly at about 85.7 ka, when d18O decreased by approximately 4 per mil in 200 years. Monsoon variability, inferred from the MIS 5c-5d and MIS 5a-5b records, closely coincides with global climate changes observed in the GISP2, Vostok, and SPECMAP records, and with the Northern Hemisphere insolation curve. This suggests that East Asian summer monsoon intensity varies in phase with global climate fluctuations and is largely controlled by variations in Northern Hemisphere incident solar radiation. The MIS 5a-5b and 5c-5d paleomonsoon records from Wanxiang Cave also agree well with other records of Asian monsoon variability indicating that d18O of speleothems from Wanxiang Cave is a valid proxy for past changes in monsoon intensity.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/wanxiang2006wxsm51.txt Data File; Wanxiang Cave Speleothem WXSM-51 d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/wanxiang2006wxsm52.txt Data File; Wanxiang Cave Speleothem WXSM-52 d18O Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11