气候变化领域集成服务门户(CCPortal): Characteristics of PM2.5 spatial distribution and influencing meteorological conditions in Sichuan Basin, southwestern China

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DOI	10.1016/j.atmosenv.2021.118364
	Characteristics of PM2.5 spatial distribution and influencing meteorological conditions in Sichuan Basin, southwestern China
	Liu Y.; Shi G.; Zhan Y.; Zhou L.; Yang F.
发表日期	2021
ISSN	1352-2310
卷号	253
英文摘要	Understanding the mechanisms causing spatial variations of PM2.5 can provide implications of factors influencing air pollution possibilities. In this study, the spatial distribution of PM2.5 concentration was decomposed into various patterns by applying the Empirical Orthogonal Function (EOF) analysis to investigate main PM2.5 mass distribution patterns and corresponding meteorological conditions in the Sichuan Basin, southwestern China. The first five EOF patterns were determined and accounted for 80.5% of the total variance. The first pattern (61.7%) was consistent with the average PM2.5 mass distribution in the study area and was attributed to anthropogenic emissions. The remaining four patterns were ascribed to meteorological conditions and topography. The distribution patterns of the second and third EOFs were mainly caused by horizontal transport of pollutants accompanied by different circulation types. The fourth EOF was influenced by horizontal circulation, vertical movement and topography synthetically. The fifth EOF presented circular distribution of PM2.5 and resulted from convection activities accompanied with subsidence in the perimeter within the basin. This information provides a new perspective to explore the meteorological influence on regional distribution of PM2.5 in the Sichuan Basin, while having implications for refining pollution control strategies on a regional scale. © 2021 The Author(s)
关键词	EOF Meteorological influence PM2.5 Spatial distribution The Sichuan basin
语种	英语
scopus关键词	Orthogonal functions; Pollution control; Topography; Distribution patterns; Empirical Orthogonal Function; Empirical orthogonal function analysis; Mass distribution; Meteorological condition; Meteorological influence; PM$-2.5$; Sichuan Basin; Spatial variations; The sichuan basin; Spatial distribution; anthropogenic source; atmospheric convection; atmospheric pollution; concentration (composition); empirical orthogonal function analysis; meteorology; particulate matter; pollutant transport; pollution control; spatial distribution; spatial variation; Article; atmospheric diffusion; atmospheric dispersion; China; machine learning; meteorology; particulate matter 2.5; pollution control; priority journal; random forest; topography; variance; China; Sichuan Basin
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248467
作者单位	Department of Environmental Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China; National Engineering Research Center on Flue Gas Desulfurization, Chengdu, Sichuan 610065, China
推荐引用方式 GB/T 7714	Liu Y.,Shi G.,Zhan Y.,et al. Characteristics of PM2.5 spatial distribution and influencing meteorological conditions in Sichuan Basin, southwestern China[J],2021,253.
APA	Liu Y.,Shi G.,Zhan Y.,Zhou L.,&Yang F..(2021).Characteristics of PM2.5 spatial distribution and influencing meteorological conditions in Sichuan Basin, southwestern China.ATMOSPHERIC ENVIRONMENT,253.
MLA	Liu Y.,et al."Characteristics of PM2.5 spatial distribution and influencing meteorological conditions in Sichuan Basin, southwestern China".ATMOSPHERIC ENVIRONMENT 253(2021).