多种代用资料和模型模拟得到的亚洲季风在8.2ka显著气候影响的证据（英文）

作     者：MORRILL Carrie WAGNER Amy J OTTO-BLIESNER Bette L ROSENBLOOM Nan 

作者机构：Cooperative Institute for Research in Environmental SciencesUniversity of Colorado NOAA's National Climatic Data CenterPaleoclimatology Branch Climate and Global Dynamics DivisionNational Center for Atmospheric Research 

出 版 物：《地球环境学报》 (Journal of Earth Environment)

年 卷 期：2011年第2卷第3期

页      面：426-441页

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：The National Science Foundation Office of Polar Programs to Morrill and Otto-Bliesner 

主　　题：abrupt climate change coupled climate model Atlantic Meridional Overturning Circulation freshwater forcing Holocene 

摘      要：Given the likelihood of future reductions in the strength of the Atlantic Meridional Overturning Circulation(AMOC),it is important to document how changes in the AMOC have altered climate patterns in the past and to assess the skill of coupled climate models in reproducing these *** past abrupt changes in the AMOC,the 8.2 ka event provides a particularly useful case study because its duration,magnitude of AMOC reduction and background climate state are closest to conditions expected in the *** this research,we present an expanded proxy synthesis of the 8.2 ka event in monsoonal Asia,including new high-resolution lake and bog records,more sites from the East Asia monsoon region and proxies of winter monsoon *** compare proxy evidence with a new simulation of the 8.2 ka event using the Community Climate System Model version 3(CCSM3) and prescribing North Atlantic freshwater forcing according to the latest *** find clear and objectively-determined evidence for 8.2 ka climate anomalies at nearly all of the fourteen proxy sites,emphasizing the strong and widespread impacts of the event in monsoonal Asia during both summer and winter *** model simulation corroborates that these anomalies,described generally as a weakening of the summer monsoon and strengthening of the winter monsoon,were likely caused by a reduction of the *** of regional anomalies in East Asia reveals some spatial heterogeneity,however,that in the model simulation is caused by contraction of the seasonal migration of the subtropical monsoon *** duration of climate anomalies at 8.2 ka in monsoonal Asia,both in proxy records and the model simulation,generally matches the duration of the event in Greenland ice core δ^(18)O,further supporting a tight connection to the North Atlantic.