IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Global, continental, and national variation in PM2.5, O-3, and NO2 concentrations during the early 2020 COVID-19 lockdown
He, Chao1; Hong, Song1; Zhang, Lu2; Mu, Hang1; Xin, Aixuan1; Zhou, Yiqi3,4; Liu, Jinke3,5; Liu, Nanjian3,6; Su, Yuming1; Tian, Ya1; Ke, Biqin1; Wang, Yanwen7; Yang, Lu1
Corresponding AuthorHong, Song(songhongpku@126.com) ; Yang, Lu(lu_yang@whu.edu.cn)
2021-03-01
Source PublicationATMOSPHERIC POLLUTION RESEARCH
ISSN1309-1042
Volume12Issue:3Pages:136-145
AbstractLockdowns implemented in response to COVID-19 have caused an unprecedented reduction in global economic and transport activity. In this study, variation in the concentration of health-threatening air pollutants (PM2.5, NO2, and O-3) pre- and post-lockdown was investigated at global, continental, and national scales. We analyzed ground-based data from >10,000 monitoring stations in 380 cities across the globe. Global-scale results during lockdown (March to May 2020) showed that concentrations of PM2.5 and NO2 decreased by 16.1% and 45.8%, respectively, compared to the baseline period (2015-2019). However, O-3 concentration increased by 5.4%. At the continental scale, concentrations of PM2.5 and NO2 substantially dropped in 2020 across all continents during lockdown compared to the baseline, with a maximum reduction of 20.4% for PM2.5 in East Asia and 42.5% for NO2 in Europe. The maximum reduction in O-3 was observed in North America (7.8%), followed by Asia (0.7%), while small increases were found in other continents. At the national scale, PM2.5 and NO2 concentrations decreased significantly during lockdown, but O-3 concentration showed varying patterns among countries. We found maximum reductions of 50.8% for PM2.5 in India and 103.5% for NO2 in Spain. The maximum reduction in O-3 (22.5%) was found in India. Improvements in air quality were temporary as pollution levels increased in cities since lockdowns were lifted. We posit that these unprecedented changes in air pollutants were mainly attributable to reductions in traffic and industrial activities. Column reductions could also be explained by meteorological variability and a decline in emissions caused by environmental policy regulations. Our results have implications for the continued implementation of strict air quality policies and emission control strategies to improve environmental and human health.
KeywordAir pollution Confinement COVID-19 Ground-level data Lockdown
DOI10.1016/j.apr.2021.02.002
Indexed BySCI ; SCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000631783000003
PublisherTURKISH NATL COMMITTEE AIR POLLUTION RES & CONTROL-TUNCAP
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/16086
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorHong, Song; Yang, Lu
Affiliation1.Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China
5.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Gansu, Peoples R China
6.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
7.China Univ Geosci, Econ & Management Coll, Wuhan 430074, Peoples R China
Recommended Citation
GB/T 7714
He, Chao,Hong, Song,Zhang, Lu,et al. Global, continental, and national variation in PM2.5, O-3, and NO2 concentrations during the early 2020 COVID-19 lockdown[J]. ATMOSPHERIC POLLUTION RESEARCH,2021,12(3):136-145.
APA He, Chao.,Hong, Song.,Zhang, Lu.,Mu, Hang.,Xin, Aixuan.,...&Yang, Lu.(2021).Global, continental, and national variation in PM2.5, O-3, and NO2 concentrations during the early 2020 COVID-19 lockdown.ATMOSPHERIC POLLUTION RESEARCH,12(3),136-145.
MLA He, Chao,et al."Global, continental, and national variation in PM2.5, O-3, and NO2 concentrations during the early 2020 COVID-19 lockdown".ATMOSPHERIC POLLUTION RESEARCH 12.3(2021):136-145.
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