气候变化领域集成服务门户(CCPortal): Characteristics and meteorological mechanisms of transboundary air pollution in a persistent heavy PM2.5 pollution episode in Central-East China

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DOI	10.1016/j.atmosenv.2019.117239
	Characteristics and meteorological mechanisms of transboundary air pollution in a persistent heavy PM2.5 pollution episode in Central-East China
	Shi C.; Nduka I.C.; Yang Y.; Huang Y.; Yao R.; Zhang H.; He B.; Xie C.; Wang Z.; Yim S.H.L.
发表日期	2020
ISSN	1352-2310
卷号	223
英文摘要	Previous research has shown the significant transboundary air pollution (TAP) in China. Despite its adverse environmental and human health impacts, the characteristics and mechanisms of TAP have yet to be fully understood. This study comprehensively analyzed intensive ground and upper levels measurements along with the atmospheric modeling approach to determine the driving meteorological conditions responsible for the formation and evolution of a persistent severe PM2.5 pollution episode in Central-East China (CEC, 112°E −118°E, 30°N −34°N) starting from 18:00 on Dec. 3 to 18:00 on Dec. 5, 2017, which had obvious characteristics of TAP and explosive increases in PM2.5 concentration. We assessed and quantified contributions of local and nonlocal emissions to PM2.5 in the region and different cities during the episode and determined the altitude level at which TAP occurred. Results show that PM2.5 concentration in most cities in CEC region experienced two major increases: the first increase was due to the change in wind direction from south to north, transporting pollutants from north China to CEC; the second increase was driven by several important meteorological factors, including warm/cold advection at different altitudes, large-scale subsidence, and radiative cooling, jointly resulting in a deep (reaching around 800 m) and strong elevated temperature inversion with a significant reduction in mixing layer thickness and thus causing a rapid increase in PM2.5 concentration in CEC region. On average, TAP accounted for 42% of total PM2.5 concentration in the region during the event, in which the TAP impact varied by cities, ranging from ~26% to ~70%. Our findings demonstrate the synergetic effect of TAP and large-scale subsidence, providing a critical reference for air pollution forecast and assessment in the eastern China. © 2019 Elsevier Ltd
关键词	Central-east China Heavy PM2.5 pollution Large-scale subsidence Transboundary air pollution
语种	英语
scopus关键词	Air pollution; Radiative Cooling; Subsidence; Characteristics and mechanisms; East China; Elevated temperature; Formation and evolutions; Meteorological condition; Meteorological factors; Pm2.5 pollutions; Trans-boundary air pollutions; Atmospheric temperature; atmospheric modeling; atmospheric pollution; climate conditions; concentration (composition); emission; meteorology; particulate matter; transboundary pollution; advection; air pollution; altitude; article; China; city; cold stress; cooling; human; meteorology; pollutant; quantitative analysis; thickness; China
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/249364
作者单位	Anhui Province Key Laboratory of Atmospheric Sciences and Satellite Remote Sensing, Anhui Institute of Meteorological Sciences, Hefei, 230031, China; Shouxian National Climatology Observatory and Huai River Basin Typical Farm Eco-meteorological Experiment Field of CMA, Shouxian, China; Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, NT, Hong Kong; Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Shatin, NT, Hong Kong; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Zhejiang Institute of Meteorological Sciences, Hangzhou, 310008, China; Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, PO Box 1125, Hefei, Anhui 230031, China; Stanley Ho Big Data Decision Analytics Research Centre, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
推荐引用方式 GB/T 7714	Shi C.,Nduka I.C.,Yang Y.,et al. Characteristics and meteorological mechanisms of transboundary air pollution in a persistent heavy PM2.5 pollution episode in Central-East China[J],2020,223.
APA	Shi C..,Nduka I.C..,Yang Y..,Huang Y..,Yao R..,...&Yim S.H.L..(2020).Characteristics and meteorological mechanisms of transboundary air pollution in a persistent heavy PM2.5 pollution episode in Central-East China.ATMOSPHERIC ENVIRONMENT,223.
MLA	Shi C.,et al."Characteristics and meteorological mechanisms of transboundary air pollution in a persistent heavy PM2.5 pollution episode in Central-East China".ATMOSPHERIC ENVIRONMENT 223(2020).