强沙尘暴的数值模拟及PM<sub>10</sub>浓度的时空变化分析

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Abstract

An integrated dust forecasting system, which is based on the WRF/Chem and a dust emission scheme with physical mechanisms, was used to better understand dust emission, dry deposition and the evolution of spatial-temporal distribution of PM₁₀ concentration. The dust emission and near-surface PM₁₀ concentration in the black dust storm occurred on April 24, 2010 in northwest Chinawere simulated and compared with in situ observations. The black dust stormwas well captured by the integrated dust forecasting system. Mingqinwas found to be the main dust source regionaccording to the dust emission and dry deposition in the black dust storm. The dust emission and dry deposition in Dunhuang were 0.01 and 6.23 mg/m², while those of Mingqin were 5040.79 and 231.74mg/m², respectively. The dust emission of Minqin was 5.04t/km² during the black dust storm. According to the vertical distribution of PM₁₀ concentration in different regions, we found that PM₁₀ were mainly distributed within 1000m above the ground. Dust can also be diffused to the height of 3000m or higher, and then be transported to thousands of kilometers downstream.

Key words： strong dust storm PM₁₀ numerical modeling spatial-temporal distribution

Received: 28 March 2016

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X513

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	Articles by authors
	ZHOU Xu
	ZHANG Lei
	GUO Qi
	Yi Na-na
	TIAN Peng-fei
	CHEN Li-jing

Cite this article:

ZHOU Xu,ZHANG Lei,GUO Qi等. Numerical simulation of a strong dust storm and the spatial-temporal distribution of PM₁₀ concentration[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(1): 1-12.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I1/1

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