globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2019.117239
论文题名:
Characteristics and meteorological mechanisms of transboundary air pollution in a persistent heavy PM2.5 pollution episode in Central-East China
作者: Shi C.; Nduka I.C.; Yang Y.; Huang Y.; Yao R.; Zhang H.; He B.; Xie C.; Wang Z.; Yim S.H.L.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 223
语种: 英语
英文关键词: 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
学科: Central-east China ; Heavy PM2.5 pollution ; Large-scale subsidence ; Transboundary air pollution
中文摘要: 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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160980
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Atmospheric Environment,2020-01-01,223
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