首页|Simulation on the spatio-temporal distribution and emission flux of dust aerosol over East Asia in 2000-2009

Simulation on the spatio-temporal distribution and emission flux of dust aerosol over East Asia in 2000-2009

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A regional climate model (RegCM3),coupled with an online dust module,is used to simulate the spatio-temporal distribution and emission flux of dust aerosol (smaller than 20 μm in diameter) over East Asia in the period from 2000 to 2009.The model performance is firstly evaluated against available observations.Simulation results show that the model can capture the characteristics of spatio-temporal distribution of dust aerosol very well over East Asia.There always exist two extremes of dust aerosol optical depth (AOD)and column burden (CB),one is in the Taklimakan Desert of Xinjiang Uygur Autonomous Region,China,and the other is in the Badain Jaran Desert of Inner Mongolian Autonomous Region,China.The maximum value of CB appears in spring,secondary maximum in winter and minimum in autumn.To the east of 110°E,dust is transported eastward from a maximum center at a height of 700 hPa over the East Asian continent.Dust emission sources are mainly located in the Taklimakan Desert,Badain Jaran Desert,North Qinghai-Tibetan Plateau and Southwest Mongolia.There is also an obvious seasonal variation of dust emission flux (EF).Annual mean dust EF is 1,015.34 mg/(m2d),of which 62.4％ and 2.3％ are re-deposited onto the East Asian continent through a dry and wet deposition process,respectively,and the remaining 35.3％ is injected into the atmosphere or subject to long-range transport.

dust aerosolRegCM3column burdenemissiondeposition

XingTao Su、HanJie Wang、HengRui Tao、LieShuang Liu、HongFeng Zhang

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Beijing Institute of Applied Meteorology, Beijing 100029, China

Institute of Meteorology and Oceanography, PLA University of Science and Technology, Nanjing, Jiangsu 211101, China

Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Chinese Academy of Science, Beijing 100029, China

Aviation University of Air Force, Changchun, Jilin 130022, China

Atmospheric and Oceanic Sciences, Department of Physics, Peking University, Beijing 100871, China

Guizhou Air Traffic Control Bureau of CAAC, Guiyang, Guizhou 550012, China

EAAF Institute of Aeronautical Meteorology and Chemical Defense, Beijing 100085, China

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国家重点基础研究发展规划(973计划)

2011CB403202

2013

10.3724/SP.J.1226.2013.00230

寒旱区科学(英文版)
中国科学院寒区旱区环境与工程研究所,科学出版社有限责任公司

寒旱区科学(英文版)

CSCD
影响因子：0.237
ISSN：1674-3822
年,卷(期)：2013.5(2)
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