Impact of European Black Carbon on East Asian Summer Climate  

作　　者：WAN Jiang-Hua Rashed MAHMOOD LI Shuanglin 

机构地区：[1]Nansen-Zhu International Research Centre,Institute of Atmospheric Physics, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]Department of Meteorology, Commission on Science and Technology for Sustainable Development in the South, Institute of Infor mation Technology

出　　处：《Atmospheric and Oceanic Science Letters》2013年第5期375-380,共6页大气和海洋科学快报（英文版）

基　　金：supported by special projects of China Meteorological Administration(GYHY201006022);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA05090406)

摘　　要：The remote response of the East Asian summer monsoon （EASM） to European black carbon （EUBC） aerosols was studied by using an ensemble of sensitivity experiments with the Geophysical Fluid Dynamics Laboratory （GFDL） atmospheric general circulation model （AGCM） Atmospheric Model version 2.1 （AM2.1）.The results show that EUBC causes an enhanced EASM.The resulted enhanced southwesterly brings more moisture supply from the Bay of Bengal,which causes an increase in precipitation over the Yangtze River valley,northeastem China,the eastern part of the Yellow River valley,and the Tibetan Plateau.Diagnostic examination suggests that EUBC induces enhanced tropospheric heating over most of the Eurasian Continent through a propagating wave train and horizontal air temperature advection.This phenomenon results in intensified thermal contrast between land and ocean,which accounts for the enhanced EASM.Moreover,reductions in EUBC emission in 1992 may have contributed to decadal weakening of the EASM in the early 1990s.The remote response of the East Asian summer monsoon(EASM)to European black carbon(EUBC)aerosols was studied by using an ensemble of sensitivity experiments with the Geophysical Fluid Dynamics Laboratory(GFDL)atmospheric general circulation model(AGCM)Atmospheric Model version 2.1(AM2.1).The results show that EUBC causes an enhanced EASM.The resulted enhanced southwesterly brings more moisture supply from the Bay of Bengal,which causes an increase in precipitation over the Yangtze River valley,northeastern China,the eastern part of the Yellow River valley,and the Tibetan Plateau.Diagnostic examination suggests that EUBC induces enhanced tropospheric heating over most of the Eurasian Continent through a propagating wave train and horizontal air temperature advection.This phenomenon results in intensified thermal contrast between land and ocean,which accounts for the enhanced EASM.Moreover,reductions in EUBC emission in 1992 may have contributed to decadal weakening of the EASM in the early 1990s.

关 键 词：European black carbon East Asian summer monsoon thermodynamic contrast decadal shift 

分 类 号：P461[天文地球—大气科学及气象学]