DOI: 10.1073/pnas.2006853117
论文题名: COVID-19 lockdowns cause global air pollution declines
作者: Venter Z.S. ; Aunan K. ; Chowdhury S. ; Lelieveld J.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 32 起始页码: 18984
结束页码: 18990
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164088
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Venter Z.S.,Aunan K.,Chowdhury S.,et al. COVID-19 lockdowns cause global air pollution declines[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(32)