globalchange  > 气候减缓与适应
DOI: 10.1002/2017JD027343
Scopus记录号: 2-s2.0-85042227937
论文题名:
Modeling East Asian Dust and Its Radiative Feedbacks in CAM4-BAM
作者: Xie X.; Liu X.; Che H.; Xie X.; Wang H.; Li J.; Shi Z.; Liu Y.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:2
起始页码: 1079
结束页码: 1096
语种: 英语
英文关键词: CAM4-BAM ; dust cycle ; dust-radiation interaction
Scopus关键词: aerosol ; albedo ; atmospheric modeling ; dust ; optical depth ; parameterization ; radiative forcing ; size distribution ; spatial distribution ; surface temperature ; surface wind ; vertical distribution ; Far East ; North Africa
英文摘要: East Asian dust and its radiative feedbacks are analyzed by the use of the fourth version of the Community Atmosphere Model (CAM4) with a bulk aerosol model parameterization (BAM) for the dust size distribution (CAM4-BAM). Two numerical experiments are conducted and intercompared: one with (Active) and one without (Passive) the radiative effects of dust aerosols. This CAM4-BAM captures the main spatial distribution of the dust aerosol optical depth (AOD) and the dust surface concentrations over East Asia, with positive correlations with the local observational data on annual and seasonal means. A comparative analysis of the Active and Passive experiments reveals that consideration of the dust-radiation interaction can significantly reduce dust emissions, loading, transport, and dry and wet depositions over East Asia, which is opposite to the enhanced dust cycle over North Africa. Further analysis of the contrasting dust-radiation feedbacks between North Africa and East Asia shows that over North Africa, the dust radiative forcing significantly increases the surface temperature and 10 m wind speed, whereas it decreases the surface temperature and the surface wind speeds over East Asia. These contrasting radiative effects, in turn, result in distinct dust cycle changes over these two regions. Mechanistic analysis reveals that the radiative contrasts between East Asia and North Africa are mainly due to the differences in their regional surface albedo, dust vertical distribution, and size distribution. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114646
Appears in Collections:气候减缓与适应

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作者单位: SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, China; Key Laboratory for Atmospheric Chemistry, Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, CMA, Beijing, China; School of Tourism and Hospitality Management, Shaanxi Radio and TV University, Xi'an, China; LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Environmental and Climate Sciences Department, Brookhaven National Laboratory, Upton, NY, United States

Recommended Citation:
Xie X.,Liu X.,Che H.,et al. Modeling East Asian Dust and Its Radiative Feedbacks in CAM4-BAM[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(2)
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