globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-015-2641-y
Scopus记录号: 2-s2.0-84957428242
论文题名:
Potential climate effect of mineral aerosols over West Africa. Part I: model validation and contemporary climate evaluation
作者: Ji Z.; Wang G.; Pal J.S.; Yu M.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期:2017-03-04
起始页码: 1223
结束页码: 1239
语种: 英语
英文关键词: Climatic effects ; Mineral aerosols ; Regional climate model ; West Africa
英文摘要: Mineral dusts present in the atmosphere can play an important role in climate over West Africa and surrounding regions. However, current understanding regarding how dust aerosols influence climate of West Africa is very limited. In this study, a regional climate model is used to investigate the potential climatic impacts of dust aerosols. Two sets of simulations driven by reanalysis and Earth System Model boundary conditions are performed with and without the representation of dust processes. The model, regardless of the boundary forcing, captures the spatial and temporal variability of the aerosol optical depth and surface concentration. The shortwave radiative forcing of dust is negative at the surface and positive in the atmosphere, with greater changes in the spring and summer. The presence of mineral dusts causes surface cooling and lower troposphere heating, resulting in a stabilization effect and reduction in precipitation in the northern portion of the monsoon close to the dust emissions region. This results in an enhancement of precipitation to the south. While dusts cause the lower troposphere to stabilize, upper tropospheric cooling makes the region more prone to intense deep convection as is evident by a simulated increase in extreme precipitation. In a companion paper, the impacts of dust emissions on future West African climate are investigated. © 2015, Springer-Verlag Berlin Heidelberg.
资助项目: NCAR, National Science Foundation ; NSF, National Science Foundation ; NSF, National Science Foundation ; NSF, National Science Foundation ; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53836
Appears in Collections:过去全球变化的重建

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作者单位: Department of Civil Engineering and Environmental Science, Frank R. Seaver College of Science and Engineering, Loyola Marymount University, 1 LMU Drive, Los Angeles, CA, United States; Department of Civil and Environmental Engineering, University of Connecticut, 261 Glenbrook Road, Storrs Mansfield, CT, United States

Recommended Citation:
Ji Z.,Wang G.,Pal J.S.,et al. Potential climate effect of mineral aerosols over West Africa. Part I: model validation and contemporary climate evaluation[J]. Climate Dynamics,2016-01-01,46(2017-03-04)
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