气候变化领域集成服务门户(CCPortal): Impacts of synoptic forcing and topography on aerosol pollution during winter in Shenyang, Northeast China

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DOI	10.1016/j.atmosres.2021.105764
	Impacts of synoptic forcing and topography on aerosol pollution during winter in Shenyang, Northeast China
	Li X.; Miao Y.; Ma Y.; Wang Y.; Zhang Y.
发表日期	2021
ISSN	0169-8095
卷号	262
英文摘要	Northeast China frequently experiences aerosol pollution episodes in winter. In addition to the pollutant emissions, synoptic pattern and topography can impact the air quality in complex ways, which are still not well understood in Northeast China. Therefore, the impacts of synoptic forcing and topography on aerosol pollution in Shenyang were investigated combining surface observations, sounding measurements, and three-dimensional air quality simulations. The studied pollution episode occurred from January 1 to 5, 2020, along with poor meteorological dispersion conditions characterized by weak winds, strong thermal stabilities, and shallow planetary boundary layers (PBLs). During the formation of pollution, strong elevated thermal inversion layers were observed over Shenyang, induced by the large-scale synoptic pattern, which suppressed the PBL growth and the vertical dispersion of aerosols. Moreover, the blocking effect of mountains to the east of Shenyang further worsened the pollution when northwesterly/westerly flows prevailed in shallow PBLs. Numerical sensitive experiment was conducted to estimate the contribution of blocking effect of mountains to the near-surface PM2.5 concentration in Shenyang, and it was found that around one third of PM2.5 concentration during January 1–4 was relevant to the terrain effect. These findings can facilitate a comprehensive understanding of the physical formation of aerosol pollution in Northeast China and helpful for the pollution controls. © 2021 Elsevier B.V.
英文关键词	Aerosol pollution; Planetary boundary layer; Synoptic condition; Thermal inversion; Topography
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236629
作者单位	Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110166, China; State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing, 100081, China
推荐引用方式 GB/T 7714	Li X.,Miao Y.,Ma Y.,et al. Impacts of synoptic forcing and topography on aerosol pollution during winter in Shenyang, Northeast China[J],2021,262.
APA	Li X.,Miao Y.,Ma Y.,Wang Y.,&Zhang Y..(2021).Impacts of synoptic forcing and topography on aerosol pollution during winter in Shenyang, Northeast China.Atmospheric Research,262.
MLA	Li X.,et al."Impacts of synoptic forcing and topography on aerosol pollution during winter in Shenyang, Northeast China".Atmospheric Research 262(2021).