noaa-cave-26873 Haozhu Cave, China 10-30 ka Stalagmite Oxygen Isotope Data Zhang, H.; Griffiths, M.L.; Huang, J.; Cai, Y.; Wang, C.; Zhang, F.; Cheng, H.; Ning, Y.F.; Hu, C.-Y.; Xie, S.-C. Haozhu Cave, China 10-30 ka Stalagmite Oxygen Isotope Data 2019-05-21 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/26873 Investigator H. Zhang Investigator M.L. Griffiths Investigator J. Huang Investigator Y. Cai Investigator C. Wang Investigator F. Zhang Investigator H. Cheng Investigator Y.F. Ning Investigator C.-Y. Hu Investigator S.-C. Xie earth science paleoclimate speleothems oxygen isotopes geoscientificInformation Monsoon 30433 cal yr BP 8558 cal yr BP Complete 30.6833 30.6833 109.9833 109.9833 950 950 Continent Asia Eastern Asia China Haozhu Cave>LATITUDE 30.6833>LONGITUDE 109.9833 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 Hongbin Zhang, Michael L. Griffiths, Junhua Huang, Yanjun Cai, Canfa Wang, Fan Zhang, Hai Cheng, Youfeng Ning, Chaoyong Hu, Shucheng Xie 2016 Earth and Planetary Science Letters 453 243-251 10.1016/j.epsl.2016.08.008 https://www.sciencedirect.com/science/article/pii/S0012821X16304289

Previous research has shown a strong persistence for direct teleconnections between the East Asian summer monsoon (EASM) and high northern latitude climate variability during the last glacial and deglaciation, in particular between monsoon weakening and a reduced Atlantic meridional overturning circulation (AMOC). However, less attention has been paid to EASM strengthening as the AMOC was reinvigorated following peak Northern Hemisphere (NH) cooling. Moreover, climate model simulations have suggested a strong role for Antarctic meltwater discharge in modulating northward heat transport and hence NH warming, yet the degree to which Southern Hemisphere (SH) climate anomalies impacted the Asian monsoon region is still unclear. Here we present a new stalagmite oxygen-isotope record from the EASM affected region of central China, which documents two prominent stages of increased 18O-depleted moisture delivery to the region through the transition from Heinrich Stadial 1 (HS1) to the Bølling-Allerod (B-A) interstadial; this is in general agreement with the other monsoonal records from both NH and SH mid to low latitudes. Through novel comparisons with a recent iceberg-rafted debris (IRD) record from the Southern Ocean, we propose that the two-stage EASM intensification observed in our speleothem records were linked with two massive Antarctic icesheet discharge (AID) events at ~16.0 ka and ~14.7 ka, immediately following the peak HS1 stadial event. Notably, the large increase in EASM intensity at the beginning of the HS1/B-A transition (~16 ka) is relatively muted in the NH higher latitudes, and better aligns with the changes observed in the SH, indicating the Antarctic and Southern Ocean perturbations could have an active role in driving the initial EASM strengthening at this time. Indeed, Antarctic freshwater input to the Southern Ocean during these AID events would have cooled the surrounding surface waters and caused an expansion of sea ice, restricting the southern extent of the SH westerlies. Moreover, increased meltwater flux during IRD events would have freshened Antarctic Intermediate Water, leading to the increased formation of North Atlantic Deep Water and enhanced North Atlantic subsurface heat release, and causing a strengthening of the AMOC during the HS1-Bolling transition. The result of this sequence-of-events would have been warming in the North Atlantic whilst at the same time cooling in the Antarctic. The ensuing interhemispheric temperature gradient would have acted to push the ITCZ northward, weakening the Australian-Indonesian summer monsoon (AISM) whilst intensifying the EASM. STUDY NOTES: Speleothem oxygen isotope (d18O) data from Haozhu Cave, central China during last deglaciation

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/haozhu2016d18o.txt NOAA Template File; Haozhu Cave 10-30 ka d18O Data USA/NOAA DIF Version 9.8.4 2019-05-24 2019-05-24