Effects of Aerosols on Radiative Forcing and Climate Over East Asia With Different SO2 Emissions

doi:10.3390/atmos7080099

	Effects of Aerosols on Radiative Forcing and Climate Over East Asia With Different SO2 Emissions
	Wang, Hongli 1; Liu, Xiaodong 2,3; Xie, Xiaoning 2; Wang, Zhaosheng 2
刊名	ATMOSPHERE
	2016-08-01
卷号	7 期号:8
关键词	Aerosol Direct Effect Aerosol Indirect Effect Summer Precipitation
DOI	10.3390/atmos7080099
文献子类	Article
英文摘要	It is known that aerosol and precursor gas emissions over East Asia may be underestimated by 50% due to the absence of data on regional rural and township industries. As the most important element of anthropogenic emissions, sulphur dioxide (SO2) can form sulfate aerosols through several chemical processes, thus affecting the regional and global climate. In this study, we use the Community Atmospheric Model 5.1 (CAM5.1) to investigate the effects of anthropogenic aerosols on radiative forcing and the climate over East Asia, taking into consideration various SO2 emission levels, including double the amount of SO2 emissions over East Asia. Numerical experiments are performed using high-resolution CAM5.1 with pre-industrial (PI) and present day (PD) aerosol emission levels, and with PD aerosol emission levels with double SO2 emissions over East Asia (PD2SO2). The simulated aerosol optical depth and surface sulfate concentrations over East Asia are significantly increased in PD2SO2, which is in better agreement with the observational results. The simulation results show extensive aerosol direct and indirect radiative forcing for PD PI (the difference between PI and PD), which significantly weakens the large-scale intensity of the East Asian summer monsoon (EASM) and reduces the summer precipitation. Compared to PD, the aerosol direct radiative forcing is significantly increased in PD2SO2, whereas the aerosol indirect radiative forcing is markedly decreased due to the inhibition of cloud formation, especially over North China. The increase in aerosol direct radiative forcing and decrease in aerosol indirect radiative forcing result in insignificant changes in the total amount of aerosol radiative forcing. These results also show that the large-scale intensity of the EASM and the associated summer precipitation are insensitive to the doubling of current SO2 emissions.
WOS关键词	COMMUNITY ATMOSPHERE MODEL ; BLACK CARBON AEROSOLS ; ANTHROPOGENIC AEROSOLS ; SUMMER MONSOON ; CLOUD MICROPHYSICS ; CHINA ; RESOLUTION
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
WOS记录号	WOS:000382476600004
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5673]
专题	地球环境研究所_古环境研究室
作者单位	1.Shaanxi Radio & TV Univ, Xian 710002, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Peoples R China 3.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Dept Environm Sci & Technol, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hongli,Liu, Xiaodong,Xie, Xiaoning,et al. Effects of Aerosols on Radiative Forcing and Climate Over East Asia With Different SO2 Emissions[J]. ATMOSPHERE,2016,7(8).
APA	Wang, Hongli,Liu, Xiaodong,Xie, Xiaoning,&Wang, Zhaosheng.(2016).Effects of Aerosols on Radiative Forcing and Climate Over East Asia With Different SO2 Emissions.ATMOSPHERE,7(8).
MLA	Wang, Hongli,et al."Effects of Aerosols on Radiative Forcing and Climate Over East Asia With Different SO2 Emissions".ATMOSPHERE 7.8(2016).