干旱区生态环境知识资源中心(Arid): Comparison of dust emissions,transport, and deposition between the Taklimakan Desert and Gobi Desert from 2007 to 2011

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	Comparison of dust emissions,transport, and deposition between the Taklimakan Desert and Gobi Desert from 2007 to 2011
	Chen Siyu; Huang Jianping; Li Jingxin; Jia Rui; Jiang Nanxuan; Kang Litai; Ma Xiaojun; Xie Tingting
来源期刊	Science China. Earth Sciences
ISSN	1674-7313
出版年	2017
卷号	60 期号:7 页码:1338-1355
英文摘要	The Taklimakan Desert (TD) and Gobi Desert (GD) are two of the most important dust sources in East Asia, and have important impact on energy budgets,ecosystems and water cycles at regional and even global scales. To investigate the contribution of the TD and the GD to dust concentrations in East Asia as a whole, dust emissions,transport, and deposition over the TD and the GD in different seasons from 2007 to 2011 were systematically compared,based on the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem). Dust emissions,uplift,and long-range transport related to these two dust source regions were markedly different due to differences in topography,elevation,thermal conditions,and atmospheric circulation. Specifically, the topography of the GD is relatively flat, and at a high elevation, and the area is under the influence of two jet streams at high altitudes, resulting in high wind speeds in the upper atmosphere. Deep convective mixing enables the descending branch of jet streams to continuously transport momentum downward to the mid-troposphere, leading to enhanced wind speeds in the lower troposphere over the GD which favors the vertical uplift of the GD dust particles. Therefore,the GD dust was very likely to be transported under the effect of strong westerly jets, and thus played the most important role in contributing to dust concentrations in East Asia. Approximately 35% and 31% of dust emitted from the GD transported to remote areas in East Asia in spring and summer,respectively. The TD has the highest dust emission capabilities in East Asia, with emissions of about 70.54Tgyr~(-1) in spring,accounting for 42% of the total dust emissions in East Asia. However,the TD is located in the Tarim Basin and surrounded by mountains on three sides. Furthermore, the dominant surface wind direction is eastward and the average wind speed at high altitudes is relatively small over the TD. As a result,the TD dust particles are not easily transported outside the Tarim Basin,such that most of the dust particles are re-deposited after uplift,at a total deposition rate of about 40gm~(-2). It is only when the TD dust particles are uplifted above 4 km,and entrained in westerlies that they begin to undergo a long-range transport. Therefore, the contribution of the TD dust to East Asian dust concentrations was relatively small. Only 25% and 23% of the TD dust was transported to remote areas over East Asia in spring and summer, respectively.
英文关键词	East Asian dust WRF-Chem model Taklimakan Desert Dust Gobi Desert Dust Dust emissions Dust transport Dust deposition
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:6041184
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335845
作者单位	Chen Siyu, Lanzhou University, College of Atmospheric Sciences, Lanzhou, Gansu 730000, China.; Huang Jianping, Lanzhou University, College of Atmospheric Sciences, Lanzhou, Gansu 730000, China.; Jia Rui, Lanzhou University, College of Atmospheric Sciences, Lanzhou, Gansu 730000, China.; Jiang Nanxuan, Lanzhou University, College of Atmospheric Sciences, Lanzhou, Gansu 730000, China.; Kang Litai, Lanzhou University, College of Atmospheric Sciences, Lanzhou, Gansu 730000, China.; Ma Xiaojun, Lanzhou University, College of Atmospheric Sciences, Lanzhou, Gansu 730000, China.; Xie Tingting, Lanzhou University, College of Atmospheric Sciences, Lanzhou, Gansu 730000, China.; Li Jingxin, Chinese Academy of Meteorological Sciences, Institute of Climate System (Polar Meteorology), State Key Laboratory of Severe Weather, Beijing 100081, China.
推荐引用方式 GB/T 7714	Chen Siyu,Huang Jianping,Li Jingxin,et al. Comparison of dust emissions,transport, and deposition between the Taklimakan Desert and Gobi Desert from 2007 to 2011[J],2017,60(7):1338-1355.
APA	Chen Siyu.,Huang Jianping.,Li Jingxin.,Jia Rui.,Jiang Nanxuan.,...&Xie Tingting.(2017).Comparison of dust emissions,transport, and deposition between the Taklimakan Desert and Gobi Desert from 2007 to 2011.Science China. Earth Sciences,60(7),1338-1355.
MLA	Chen Siyu,et al."Comparison of dust emissions,transport, and deposition between the Taklimakan Desert and Gobi Desert from 2007 to 2011".Science China. Earth Sciences 60.7(2017):1338-1355.