Timing and structure of the 8.2 kyr BP event inferred from delta O-18 records of stalagmites from China, Oman, and Brazil

作者：Cheng Hai^*; Fleitmann Dominik; Edwards R Lawrence; Wang Xianfeng; Cruz Francisco W; Auler Augusto S; Mangini Augusto; Wang Yongjin; Kong Xinggong; Burns Stephen J; Matter Albert

来源：Geology, 2009, 37(11): 1007-1010.

DOI：10.1130/G30126A.1

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.

• 出版日期2009-11
• 单位南京师范大学