CAUSATION ANALYSIS OF THE DIRECT CLIMATE EFFECTS OF ANTHROPOGENIC AEROSOL ON EAST-ASIAN SUMMER MONSOON

• Published in: Journal of Tropical Meteorology Vol. 22; no. 1; pp. 42 - 50
• Main Author: 王勇 吉振明 沈新勇 陈明诚
• Format: Journal Article
• Language: English
• Published: Guangzhou Guangzhou Institute of Tropical & Marine Meteorology 01.03.2016
• Subjects: Carbon; Experiments; Freshwater; Inventory; Marine; Precipitation; Summer; Wind; East Asia; South Asia; China, People's Rep
• ISSN: 1006-8775
• DOI: 10.16555/j.1006-8775.2016.01.005

A regional climate model coupled with an aerosol model is employed to numerically simulate the direct cli- mate effects of the anthropogenic aerosol emitted in South Asia and China in the East Asian summer monsoon during 1988 to 2009. Based on the data of the numerical simulation, composite analysis and correlation analysis are used to make diagnostic study of climate dynamics. Results show that the month of maximum emission of the mean column burden of the anthropogenic aerosol in the main emission areas of South Asia is opposite in phase to that in China. Summer is the season of maximum emission amount in China, but the emission amounts are more in South Asia in spring and winter. On the whole, the mean column burden of the anthropogenic aerosol in China is relatively high com- pared with that in South Asia. The trend of distribution of aerosol is SW-NE in China, and Sichuan Basin is the emis- sion center of aerosol. 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 aerosol on the concentration and distribution of aerosol in China.