【摘 要】
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Linkages between the summer monsoons (Indian and East Asian) and temperature conditions in the North Atlantic are well-documented from paleoclimate records.Understanding the reasons for this teleconne
【机 构】
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Cooperative Institute for Research in Environmental Sciences (CIRES) University of Colorado at Bould
【出 处】
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“东亚欧环境变化过程-亚洲季风变化与高低纬气候相互作用”第八届国际研讨会
论文部分内容阅读
Linkages between the summer monsoons (Indian and East Asian) and temperature conditions in the North Atlantic are well-documented from paleoclimate records.Understanding the reasons for this teleconnection is important for predicting the future behavior of the monsoons, especially as anthropogenic climate change continues to cause significant impacts in high-latitude areas such as the North Atlantic and Arctic.I will review proxy evidence and present modeling results to examine the physical mechanisms of this teieconnection for three past time periods: stadials/interstadials during the last glacial period, the 8.2 ka event and mid-Holocene abrupt climate change around 5.5 ka.First, to test the hypothesis that pulses of freshwater added to the North Atlantic could have led to a remote climate response in Asia during the last glacial, I will show results from an experiment using the National Center for Atmospheric Research (NCAR) coupled Community Climate System Model, version 3.In this experiment with Last Glacial Maximum boundary conditions, a 1 Sverdrup (1×106 m3·s-1) freshwater hosing was applied over the North Atlantic between 50°N and 70°N for 100 years.
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