气候变化领域集成服务门户(CCPortal): Impacts of COVID-19 on air quality in mid-eastern China: An insight into meteorology and emissions

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DOI	10.1016/j.atmosenv.2021.118750
	Impacts of COVID-19 on air quality in mid-eastern China: An insight into meteorology and emissions
	Zhao X.; Wang G.; Wang S.; Zhao N.; Zhang M.; Yue W.
发表日期	2021
ISSN	1352-2310
卷号	266
英文摘要	The coronavirus disease (COVID-19) spread rapidly worldwide in the first half of 2020. Stringent national lockdown policies imposed by China to prevent the spread of the virus reduced anthropogenic emissions and improved air quality. A weather research and forecasting model coupled with chemistry was applied to evaluate the impact of meteorology and emissions on air quality during the COVID-19 outbreak (from January 23 to February 29, 2020) in mid-eastern China. The results show that air pollution episodes still occurred on polluted days and accounted for 31.6%–60.5% of the total number of outbreak days in mid-eastern China from January 23 to February 29, 2020. However, anthropogenic emissions decreased significantly, indicating that anthropogenic emission reduction cannot completely offset the impact of unfavorable meteorological conditions on air quality. Favorable meteorological conditions in 2019 improved the overall air quality for a COVID-19 outbreak in 2019 instead of 2020. PM2.5 concentrations decreased by 4.2%–29.2% in Beijing, Tianjin, Shijiazhuang, and Taiyuan, and increased by 6.1%–11.5% in Jinan and Zhengzhou. PM2.5 concentrations increased by 10.9%–20.5% without the COVID-19 outbreak of 2020 in mid-eastern China, and the frequency of polluted days increased by 5.3%–18.4%. Source apportionment of PM2.5 during the COVID-19 outbreak showed that industry and residential emissions were the dominant PM2.5 contributors (32.7%–49.6% and 26.0%–44.5%, respectively) followed by agriculture (18.7%–24.0%), transportation (7.7%–15.5%), and power (4.1%–5.9%). In Beijing, industrial and residential contributions to PM2.5 concentrations were lower (32.7%) and higher (44.5%), respectively, than in other cities (38.7%–49.6% for industry and 26.0%–36.2% for residential). Therefore, enhancing regional cooperation and implementing a united air pollution control are effective emission mitigation measures for future air quality improvement, especially the development of new technologies for industrial and cooking fumes. © 2021 Elsevier Ltd
关键词	Emission reduction Meteorological condition PM2.5 Source apportionment WRF/Chem
语种	英语
scopus关键词	Air quality; Coronavirus; Housing; Meteorology; Quality control; Viruses; Weather forecasting; Anthropogenic emissions; Coronaviruses; Eastern China; Emission reduction; Meteorological condition; PM 2.5; Source apportionment; Stringents; Weather research and forecasting models; WRF/Chem; Emission control; air quality; anthropogenic effect; atmospheric pollution; COVID-19; disease spread; emission; health policy; meteorology; pollution control; pollution effect; weather forecasting; agriculture; air pollutant; air pollution; air pollution control; air quality; air quality standard; air temperature; ambient air; Article; China; city; comparative study; concentration (parameter); coronavirus disease 2019; forecasting; industry; meteorology; national lockdown; particulate matter 2.5; relative humidity; residential area; traffic and transport; wind speed; China; Coronavirus
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/248209
作者单位	National Environmental Protection Research Institute for Electric Power Co., Ltd. State Environmental Protection Key Laboratory of Atmospheric Physical Modeling and Pollution Control, Nanjing, 210031, China; Department of Environmental and Safety Engineering, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China; Department of Environmental Art Engineering, Nanjing Technical Vocational College, Nanjing, 210019, China
推荐引用方式 GB/T 7714	Zhao X.,Wang G.,Wang S.,et al. Impacts of COVID-19 on air quality in mid-eastern China: An insight into meteorology and emissions[J],2021,266.
APA	Zhao X.,Wang G.,Wang S.,Zhao N.,Zhang M.,&Yue W..(2021).Impacts of COVID-19 on air quality in mid-eastern China: An insight into meteorology and emissions.ATMOSPHERIC ENVIRONMENT,266.
MLA	Zhao X.,et al."Impacts of COVID-19 on air quality in mid-eastern China: An insight into meteorology and emissions".ATMOSPHERIC ENVIRONMENT 266(2021).