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Environ Pollut

Title:		Persistent ozone pollution episodes in North China exacerbated by regional transport
Author(s):		Gong C; Liao H; Zhang L; Yue X; Dang R; Yang Y;
Address:		"State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, Jiangsu, China. Electronic address: hongliao@nuist.edu.cn. Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, Jiangsu, China"
Journal Title:		Environ Pollut
Year:		2020
Volume:		20200620
Issue:		Pt A
Page Number:		115056 -
DOI:		10.1016/j.envpol.2020.115056
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"Summertime ozone (O(3)) concentrations over China continue to increase although the governmental Clear Air Actions have been carried out since 2013. The worst O(3) pollution is confronted over North China Plain. Ozone polluted days (with observed regionally-averaged maximum daily 8-h average (MDA8) O(3) concentrations exceeding 80 ppbv) in May-July in North China increased from 35 days in year 2014 to 56 days in year 2018, and persistent O(3) pollution episodes that lasted for 5 days or longer (OPEs5) contributed 14.3% and 66.1% to those O(3) polluted days in 2014 and 2018, respectively. Model simulations suggest that O(3) transport from central eastern China (including Shandong, Henan, Jiangsu and Anhui Provinces) contributes 36% of the enhanced O(3) concentrations in North China during OPEs5 relative to the seasonal mean. We find that emission control of volatile organic compounds in central eastern China is most effective to alleviate intensity of OPEs5 in North China"
Keywords:		Air Pollutants/*analysis *Air Pollution China Environmental Monitoring Environmental Pollution Ozone/*analysis Seasons Cooperative emission reductions North China Ozone pollution episode Regional transport;
Notes:		"MedlineGong, Cheng Liao, Hong Zhang, Lin Yue, Xu Dang, Ruijun Yang, Yang eng England 2020/07/01 Environ Pollut. 2020 Oct; 265(Pt A):115056. doi: 10.1016/j.envpol.2020.115056. Epub 2020 Jun 20"