气候变化领域集成服务门户(CCPortal): COVID-19 lockdowns cause global air pollution declines

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DOI	10.1073/pnas.2006853117
	COVID-19 lockdowns cause global air pollution declines
	Venter Z.S.; Aunan K.; Chowdhury S.; Lelieveld J.
发表日期	2020
ISSN	0027-8424
起始页码	18984
结束页码	18990
卷号	117 期号:32
英文摘要	The lockdown response to coronavirus disease 2019 (COVID-19) has caused an unprecedented reduction in global economic and transport activity. We test the hypothesis that this has reduced tropospheric and ground-level air pollution concentrations, using satellite data and a network of >10,000 air quality stations. After accounting for the effects of meteorological variability, we find declines in the population-weighted concentration of ground-level nitrogen dioxide (NO2: 60% with 95% CI 48 to 72%), and fine particulate matter (PM2.5: 31%; 95% CI: 17 to 45%), with marginal increases in ozone (O3: 4%; 95% CI: -2 to 10%) in 34 countries during lockdown dates up until 15 May. Except for ozone, satellite measurements of the troposphere indicate much smaller reductions, highlighting the spatial variability of pollutant anomalies attributable to complex NOx chemistry and long-distance transport of fine particulate matter with a diameter less than 2.5 μm (PM2.5). By leveraging Google and Apple mobility data, we find empirical evidence for a link between global vehicle transportation declines and the reduction of ambient NO2 exposure. While the state of global lockdown is not sustainable, these findings allude to the potential for mitigating public health risk by reducing business as usual air pollutant emissions from economic activities. © 2020 National Academy of Sciences. All rights reserved.
语种	英语
scopus关键词	nitrogen dioxide; ozone; nitrogen dioxide; ozone; air pollutant; air pollution; air quality; Article; communicable disease control; concentration (parameter); controlled study; coronavirus disease 2019; health hazard; lockdown; particle size; particulate matter 2.5; pollution transport; priority journal; satellite imagery; spatial analysis; traffic and transport; troposphere; air pollution; atmosphere; chemistry; Coronavirus infection; economics; exhaust gas; human; pandemic; particulate matter; quarantine; virus pneumonia; Air Pollutants; Air Pollution; Atmosphere; Coronavirus Infections; Humans; Nitrogen Dioxide; Ozone; Pandemics; Particulate Matter; Pneumonia, Viral; Quarantine; Vehicle Emissions
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160846
作者单位	Venter, Z.S., Terrestrial Ecology Section, Norwegian Institute for Nature Research, Oslo, 0349, Norway; Aunan, K., Center for International Climate Research, Oslo, 0318, Norway; Chowdhury, S., Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Lelieveld, J., Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany, Climate and Atmosphere Research Center, Cyprus Institute, Nicosia, 1645, Cyprus
推荐引用方式 GB/T 7714	Venter Z.S.,Aunan K.,Chowdhury S.,et al. COVID-19 lockdowns cause global air pollution declines[J],2020,117(32).
APA	Venter Z.S.,Aunan K.,Chowdhury S.,&Lelieveld J..(2020).COVID-19 lockdowns cause global air pollution declines.Proceedings of the National Academy of Sciences of the United States of America,117(32).
MLA	Venter Z.S.,et al."COVID-19 lockdowns cause global air pollution declines".Proceedings of the National Academy of Sciences of the United States of America 117.32(2020).