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A modeling study of the effects of aerosols on clouds and precipitation over East Asia
Liu, XD (Liu, Xiaodong)[1]; Xie, XN (Xie, Xiaoning)[1]; Yin, ZY (Yin, Zhi-Yong)[1,3]; Liu, CH (Liu, Changhai)[2]; Gettelman, A (Gettelman, Andrew)[2]
2011-12-30
发表期刊THEORETICAL AND APPLIED CLIMATOLOGY
卷号106期号:3-4页码:343-354
文章类型期刊论文
摘要

The National Center for Atmospheric Research Community Atmosphere Model (version 3.5) coupled with the Morrison-Gettelman two-moment cloud microphysics scheme is employed to simulate the aerosol effects on clouds and precipitation in two numerical experiments, one representing present-day conditions (year 2000) and the other the pre-industrial conditions (year 1750) over East Asia by considering both direct and indirect aerosol effects. To isolate the aerosol effects, we used the same set of boundary conditions and only altered the aerosol emissions in both experiments. The simulated results show that the cloud microphysical properties are markedly affected by the increase in aerosols, especially for the column cloud droplet number concentration (DNC), liquid water path (LWP), and the cloud droplet effective radius (DER). With increased aerosols, DNC and LWP have been increased by 137% and 28%, respectively, while DER is reduced by 20%. Precipitation rates in East Asia and East China are reduced by 5.8% and 13%, respectively, by both the aerosol's second indirect effect and the radiative forcing that enhanced atmospheric stability associated with the aerosol direct and first indirect effects. The significant reduction in summer precipitation in East Asia is also consistent with the weakening of the East Asian summer monsoon, resulting from the decreasing thermodynamic contrast between the Asian landmass and the surrounding oceans induced by the aerosol's radiative effects. The increase in aerosols reduces the surface net shortwave radiative flux over the East Asia landmass, which leads to the reduction of the land surface temperature. With minimal changes in the sea surface temperature, hence, the weakening of the East Asian summer monsoon further enhances the reduction of summer precipitation over East Asia.

DOI10.1007/s00704-011-0436-6
收录类别SCI
语种英语
引用统计
被引频次:33[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10256
专题古环境研究室
通讯作者Liu, XD (Liu, Xiaodong)[1]
作者单位1.SKLLQG, Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710075, China;
2.National Center for Atmospheric Research,PO Box 3000, Boulder, CO 80307, USA;
3.University of San Diego,San Diego, CA 92110, USA
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Liu, XD ,Xie, XN ,Yin, ZY ,et al. A modeling study of the effects of aerosols on clouds and precipitation over East Asia[J]. THEORETICAL AND APPLIED CLIMATOLOGY,2011,106(3-4):343-354.
APA Liu, XD ,Xie, XN ,Yin, ZY ,Liu, CH ,&Gettelman, A .(2011).A modeling study of the effects of aerosols on clouds and precipitation over East Asia.THEORETICAL AND APPLIED CLIMATOLOGY,106(3-4),343-354.
MLA Liu, XD ,et al."A modeling study of the effects of aerosols on clouds and precipitation over East Asia".THEORETICAL AND APPLIED CLIMATOLOGY 106.3-4(2011):343-354.
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