8.2k Event Speleothem Oxygen Isotope Data Cheng, H.; Fleitmann, D.; Edwards, R.L.; Wang, X.; Cruz, F.W.; Auler, A.S.; Mangini, A.; Wang, Y.; Kong, X.; Burns, S.J.; Matter, A. Cheng, H. Fleitmann, D. Edwards, R.L. Wang, X. Cruz, F.W. Auler, A.S. Mangini, A. Wang, Y. Kong, X. Burns, S.J. Matter, A. Intertropical Convergence Zone (ITCZ) Meridional Overturning Circulation (MOC) Monsoon abrupt climate change 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 (Paixão Cave>LATITUDE -12.65>LONGITUDE -41.05) (Hoti Cave>LATITUDE 23.08>LONGITUDE 57.35) (Dongge Cave>LATITUDE 25.28>LONGITUDE 108.08) (Qunf Cave>LATITUDE 17.17>LONGITUDE 54.3) (Padre Cave>LATITUDE -13.2167>LONGITUDE -44.05) Oxygen isotope records of stalagmites from China and Oman reveal a weak summer monsoon event, with a double-plunging structure, that started 8.21 ± 0.02 kyr B.P. An identical but antiphased pattern is also evident in two stalagmite records from eastern Brazil, indicating that the South American Summer Monsoon was intensified during the 8.2 kyr B.P. event. These records demonstrate that the event was of global extent and synchronous within dating errors of <50 years. In comparison with recent model simulations, it is plausible that the 8.2 kyr B.P. event can be tied in changes of the Atlantic Meridional Overturning Circulation triggered by a glacial lake draining event. This, in turn, affected North Atlantic climate and latitudinal position of the Intertropical Convergence Zone, resulting in the observed low-latitude monsoonal precipitation patterns. STUDY NOTES: Oxygen isotope data from six stalagmites in China, the Middle East, and South America over the 8.2k Climate Event. The stalagmites are from Dongge Cave, southern China (D4 and DA, 25°17'N, 108°5'E), Qunf Cave, Oman (Q5, 17°10'N, 54°18'E), Hoti Cave, Oman (H14, 23°05'N, 57°21'E), Padre Cave (PAD07, 13°13'S, 44°3'W), eastern Brazil, and Paixão Cave (PX5, 12°39'S, 41°3'W), eastern Brazil NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Cheng, H. Investigator : Fleitmann, D. Investigator : Edwards, R.L. Investigator : Wang, X. Investigator : Cruz, F.W. Investigator : Auler, A.S. Investigator : Mangini, A. Investigator : Wang, Y. Investigator : Kong, X. Investigator : Burns, S.J. Investigator : Matter, A. 2010-07-21 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/9957 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/cheng2009-8200bp.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/cheng2009-8200bp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/cheng2009-8200bp.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/cheng2009-8200bp.txt English https://www.ncdc.noaa.gov/paleo/study/9957 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/cheng2009-8200bp.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/cheng2009-8200bp.txt Cheng, H., D. Fleitmann, R.L. Edwards, X. Wang, F.W. Cruz, A.S. Auler, A. Mangini, Y. Wang, X. Kong, S.J. Burns, and A. Matter. 2009. Timing and structure of the 8.2 kyr B.P. event inferred from d18O records of stalagmites from China, Oman, and Brazil. Geology, Vol. 37, No. 11, pp. 1007–1010, November 2009. doi: 10.1130/G30126A.1 START YEAR: 8566 cal yr BP * END YEAR: 7678 cal yr BP -44.05 -13.2167 108.08 25.28