Modeled Influence of East Asian Black Carbon on Inter-Decadal Shifts in East China Summer Rainfall

作     者：Rashed MAHMOOD LI Shuang-Lin 

作者机构：Nansen-Zhu International Research Centre Institute ofA tmospheric Physics Chinese A cademy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100029 China 

出 版 物：《Atmospheric and Oceanic Science Letters》 (大气和海洋科学快报（英文版）)

年 卷 期：2011年第4卷第6期

页      面：349-355页

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

基　　金：supported by the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant No.KZCX2-YW-Q11-03) 

主　　题：black carbon aerosol inter-decadal climate variability East China summer rainfall 

摘      要：Two inter-decadal shifts in East China summer rainfall during the last three decades of the 20th century have been *** shift occurred in the late 1970s and featured more rainfall in the Yangtze River valley and prolonged drought in North *** other shift occurred in the early 1990s and featured increased rainfall in South *** role of black carbon(BC) aerosol in the first shift event is controversial,and it has not been documented for the second *** this study,the authors used Geophysical Fluid Dynamics Laboratory s(GFDL s) atmospheric general circulation model known as Atmosphere and Land Model(AM2.1) ,which has been shown to capture East Asian climate variability well,to investigate these issues by conducting sensitive experiments with or without historical BC in East Asia. The results suggest that the model reproduces the first shift well,including intensified rainfall in the Yangtze River and weakened monsoonal ***,the model captures only a fraction of the observed variations for the second shift ***,the role of BC in modulating the two shift events is different,and its impact is relatively less important for the early 1990s event.