气候变化领域集成服务门户(CCPortal): Heavy air pollution with a unique "non-stagnant" atmospheric boundary layer in the Yangtze River middle basin aggravated by regional transport of PM2.5 over China

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DOI	10.5194/acp-20-7217-2020
	Heavy air pollution with a unique "non-stagnant" atmospheric boundary layer in the Yangtze River middle basin aggravated by regional transport of PM2.5 over China
	Yu C.; Yu C.; Zhao T.; Bai Y.; Zhang L.; Zhang L.; Kong S.; Yu X.; He J.; Cui C.; Yang J.; You Y.; Ma G.; Wu M.; Chang J.
发表日期	2020
ISSN	1680-7316
起始页码	7217
结束页码	7230
卷号	20 期号:12
英文摘要	The regional transport of air pollutants, controlled by emission sources and meteorological factors, results in a complex source-receptor relationship of air pollution change. Wuhan, a metropolis in the Yangtze River middle basin (YRMB) of central China, experienced heavy air pollution characterized by hourly PM2.5 concentrations reaching 471.1 μg m- in January 2016. To investigate the regional transport of PM2.5 over central eastern China (CEC) and the meteorological impact on wintertime air pollution in the YRMB area, observed meteorological and other relevant environmental data from January 2016 were analyzed. Our analysis presented noteworthy cases of heavy PM2.5 pollution in the YRMB area with unique "non-stagnant"meteorological conditions of strong northerly winds, no temperature inversion, and additional unstable structures in the atmospheric boundary layer. This unique set of conditions differed from the stagnant meteorological conditions characterized by near-surface weak winds, air temperature inversion, and stable structure in the boundary layer that are typically observed in heavy air pollution over most regions in China. The regional transport of PM2.5 over CEC aggravated PM2.5 levels, thus creating heavy air pollution in the YRMB area. This demonstrates a source-receptor relationship between the originating air pollution regions in CEC and the receiving YRMB region. Furthermore, a backward trajectory simulation using a Flexible Particle dispersion (FLEXPART) Weather Research and Forecasting (WRF) model to integrate the air pollutant emission inventory over China was used to explore the patterns of regional transport of PM2.5 governed by the strong northerly winds in the cold air activity of the East Asian winter monsoon season. It was estimated that the regional transport of PM2.5 from non-local air pollutant emissions contributes more than 65 % of the PM2.5 concentrations to the heavy air pollution in the YRMB region during the study period, revealing the importance of the regional transport of air pollutants over China as a causative factor of heavy air pollution over the YRMB area.. © Author(s) 2020.
语种	英语
scopus关键词	air quality; atmospheric pollution; boundary layer; carbon emission; concentration (composition); particulate matter; pollution monitoring; solute transport; China; Yangtze River
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247702
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Premic, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Southwest Electric Power Design Institute Co. Ltd, China Power Engineering Consulting Group, Chengdu, 610021, China; Institute of Heavy Rain, China Meteorological Administration, Wuhan, 430205, China; Chengdu Academy of Environmental Sciences, Chengdu, 610031, China; Department of Atmospheric Sciences, School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan, 430074, China
推荐引用方式 GB/T 7714	Yu C.,Yu C.,Zhao T.,et al. Heavy air pollution with a unique "non-stagnant" atmospheric boundary layer in the Yangtze River middle basin aggravated by regional transport of PM2.5 over China[J],2020,20(12).
APA	Yu C..,Yu C..,Zhao T..,Bai Y..,Zhang L..,...&Chang J..(2020).Heavy air pollution with a unique "non-stagnant" atmospheric boundary layer in the Yangtze River middle basin aggravated by regional transport of PM2.5 over China.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(12).
MLA	Yu C.,et al."Heavy air pollution with a unique "non-stagnant" atmospheric boundary layer in the Yangtze River middle basin aggravated by regional transport of PM2.5 over China".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.12(2020).