沙漠地区边界层高度的提高与尘卷风起沙量的变化

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Abstract On the basis of the YSU (Yonsei University) boundary layer parameterization scheme, an empirical revised boundary layer RYSU scheme was adopted in this paper, whose simulated boundary layer height was consistent with the observation. Meanwhile, the dust devil emission scheme was applied to obtain the spatial and temporal distribution of the summer dust devil's dust emission in Tengger Desert in 2019. The results revealed that from 08:00 to 18:00, the dust devil's instantaneous dust emission and dust range simulated by the RYSU scheme were higher than those of the YSU scheme. The time when the dust emission and the range of the former was the largest was 15:00, which was one hour later than the latter. It was closer to the occurrence frequency of the dust devil observed in the Tengger Desert. Furthermore, the total daily dust devil emission in the study area from June to August with the RYSU scheme was almost three times higher than with the YSU scheme, and the maximum instantaneous dust devil emission estimated with the RYSU scheme was closer to the value calculated with the maximum height of the observed boundary layer than with the YSU scheme.

Key words： WRF-Chem model boundary layer schemes planetary boundary layer height dust devil emission

Received: 07 January 2021

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X51

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	Articles by authors
	GAO Ya-wen
	HAN Yong-xiang
	LI Jia-xin
	LU Zheng-qi
	QIN Pei
	LIU Wei-jia
	LIANG Yun

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GAO Ya-wen,HAN Yong-xiang,LI Jia-xin等. Improvement of planetary boundary layer height and variation of dust devil emission in desert areas[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(8): 3523-3528.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I8/3523

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