Abrupt changes in the Asian southwest monsoon during the Holocene and their links to the North Atlantic Ocean

被引:952
作者
Gupta, AK [1 ]
Anderson, DM
Overpeck, JT
机构
[1] Indian Inst Technol, Dept Geol & Geophys, Kharagpur 721302, W Bengal, India
[2] NOAA, Paleoclimatol Program, Boulder, CO 80305 USA
[3] Univ Arizona, Ctr Study Planet Earth, Tucson, AZ 85721 USA
[4] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA
关键词
D O I
10.1038/nature01340
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
During the last ice age, the Indian Ocean southwest monsoon exhibited abrupt changes that were closely correlated with millennial-scale climate events in the North Atlantic region(1-3), suggesting a mechanistic link. In the Holocene epoch, which had a more stable climate, the amplitude of abrupt changes in North Atlantic climate was much smaller, and it has been unclear whether these changes are related to monsoon variability. Here we present a continuous record of centennial-scale monsoon variability throughout the Holocene from rapidly accumulating and minimally bioturbated sediments in the anoxic Arabian Sea. Our monsoon proxy record reveals several intervals of weak summer monsoon that coincide with cold periods documented in the North Atlantic region(4)-including the most recent climate changes from the Medieval Warm Period to the Little Ice Age and then to the present. We therefore suggest that the link between North Atlantic climate and the Asian monsoon is a persistent aspect of global climate.
引用
收藏
页码:354 / 357
页数:4
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