全球和中国地区PM<sub>2.5</sub>时空变化特征的模拟

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Abstract

The temporal and spatial variations of the concentration of PM_2.5 from the year 1850 to 1980 and 1980 to 2010, as well as the contributions of anthropogenic and natural aerosols to these variations were simulated in this work, using an aerosol-climate coupled model BCC_AGCM2.0.1_CUACE/Aero. Results show that from 1850 to 1980, the column concentrations of anthropogenic aerosols increased significantly over the globe. The column concentrations of anthropogenic aerosols in PM_2.5 mainly increased in eastern North American, Europe and eastern China, and their changes in summer were more significant than in other seasons. The column concentrations of natural aerosols changed more obviously over several large deserts, and their changes in spring and summer were the most significant of all seasons. Anthropogenic aerosols contributed the largest to the variation of PM_2.5 column concentration in autumn(95%), but in spring their contributions were the smallest(28%), and in summer and winter their contributions were almost equal(46% and 41% respectively). From 1980 to 2010, the column concentrations of PM_2.5 and anthropogenic aerosols increased(especially in spring) in Southeast Asia, while decreased(especially in summer) in Central Europe and North American. Whereas, natural aerosols decreased sharply in desert regions during 1980 to 2010, and their changes were more significant in winter and spring. Variations of natural aerosols almost appear in deserts. The contributions of anthropogenic aerosols to the seasonal change of PM_2.5(less than 50% in all seasons) generally reduced comparing with that from 1850 to 1980.

Key words： PM_2.5 anthropogenic aerosol natural aerosol BCC_AGCM2.0.1_CUACE/Aero

Received: 20 September 2015

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X513

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	YANG dong-dong
	ZHANG hua
	SHEN xin-yong
	ZHAO shu-yun

Cite this article:

YANG dong-dong,ZHANG hua,SHEN xin-yong等. Simulation of global distribution of temporal and spatial variation of PM_2.5 concentration[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(4): 990-999.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I4/990

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