Article
Causation Analysis of the Direct Climate Effects of Anthropogenic Aerosols on East-Asian Summer Monsoon
Journal of Tropical Meteorology
Wang Yong; Ji Zhen-ming; Shen Xin-yong; Chen Min-cheng
Abstract
A regional climate model coupled with an aerosol model is employed to numerically simulate the direct climate effects of the anthropogenic aerosols discharged in South-Asia China in the East-Asian summer monsoon during 1988—2009.Based on the data of the numerical simulation,the composite analysis and correlation analysis are used to make diagnostic analysis of climate dynamics.Results show that the month of maximum emission of the mean column burden of the anthropogenic aerosols in the main emission areas of South Asia is opposite to that in China in phase.Summer is the season of maximum discharge amount in China,but the emission amounts are more in South-Asia in spring winter.On the whole,the mean column burden of the anthropogenic aerosols in China is relatively higher compared with that in South-Asia.The trend of distribution of aerosols is SW-NE in China,and Sichuan Basin is the emission center of aerosols.The effect of negative short wave radiative forcing alters the gradient of pressure between land and sea,weakening the development of East-Asian summer monsoon over the northern part of Yangtze-Huaihe River Basin.We also discuss the feedback effect of East-Asian summer monsoon which is changed by the anthropogenic aerosols on the concentration distribution of aerosols in China.
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