气候变化领域集成服务门户(CCPortal): The impact of COVID-19 control measures on air quality in China

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DOI	10.1088/1748-9326/aba3a2
	The impact of COVID-19 control measures on air quality in China
	Silver B.; He X.; Arnold S.R.; Spracklen D.V.
发表日期	2020
ISSN	17489318
卷号	15 期号:8
英文摘要	The outbreak of Coronavirus Disease 2019 (COVID-19) in China in January 2020 prompted substantial control measures including social distancing measures, suspension of public transport and industry, and widespread cordon sanitaires ('lockdowns'), that have led to a decrease in industrial activity and air pollution emissions over a prolonged period. We use a 5 year dataset from China's air quality monitoring network to assess the impact of control measures on air pollution. Pollutant concentration time series are decomposed to account for the inter-annual trend, seasonal cycles and the effect of Lunar New Year, which coincided with the COVID-19 outbreak. Over 2015-2019, there were significant negative trends in particulate matter (PM2.5, -6% yr-1) and sulphur dioxide (SO2, -12% yr-1) and nitrogen dioxide (NO2, -2.2% yr-1) whereas there were positive trends in ozone (O3, + 2.8% yr-1). We quantify the change in air quality during the LNY holiday week, during which pollutant concentrations increase on LNY's day, followed by reduced concentrations in the rest of the week. After accounting for interannual trends and LNY we find NO2 and PM concentrations were significantly lower during the lockdown period than would be expected, but there were no significant impacts on O3. Largest reductions occurred in NO2, with concentrations 27.0% lower on average across China, during the lockdown. Average concentrations of PM2.5 and PM10 across China were respectively 10.5% and 21.4% lower during the lockdown period. The largest reductions were in Hubei province, where NO2 concentrations were 50.5% lower than expected during the lockdown. Concentrations of affected pollutants returned to expected levels during April, after control measures were relaxed. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	air pollution; China; COVID-19; lockdown; lunar new year; seasonal cycle; trend
语种	英语
scopus关键词	Air quality; Disease control; Industrial emissions; Nitrogen oxides; Quality control; Sulfur dioxide; Air quality monitoring networks; Average concentration; Industrial activities; Nitrogen dioxides; Particulate Matter; Pm concentrations; Pollutant concentration; Pollution emissions; Air pollution control; air quality; atmospheric pollution; concentration (composition); nitrogen dioxide; particulate matter; public transport; spatiotemporal analysis; sulfur dioxide; viral disease; China; Hubei; Coronavirus
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153888
作者单位	School of Earth and Environment, University of Leeds, Leeds, United Kingdom; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China
推荐引用方式 GB/T 7714	Silver B.,He X.,Arnold S.R.,et al. The impact of COVID-19 control measures on air quality in China[J],2020,15(8).
APA	Silver B.,He X.,Arnold S.R.,&Spracklen D.V..(2020).The impact of COVID-19 control measures on air quality in China.Environmental Research Letters,15(8).
MLA	Silver B.,et al."The impact of COVID-19 control measures on air quality in China".Environmental Research Letters 15.8(2020).