IEECAS OpenIR  > 粉尘与环境研究室
Unexpected air pollution with marked emission reductions during the COVID-19 outbreak in China
Le, Tianhao1; Wang, Yuan1; Liu, Lang2,3; Yang, Jiani1; Yung, Yuk L.1; Li, Guohui2,3; Seinfeld, John H.4,5
Corresponding AuthorWang, Yuan(yuan.wang@caltech.edu)
2020-08-07
Source PublicationSCIENCE
ISSN0036-8075
Volume369Issue:6504Pages:702-+
AbstractThe absence of motor vehicle traffic and suspended manufacturing during the coronavirus disease 2019 (COVID-19) pandemic in China enabled assessment of the efficiency of air pollution mitigation. Up to 90% reduction of certain emissions during the city-lockdown period can be identified from satellite and ground-based observations. Unexpectedly, extreme particulate matter levels simultaneously occurred in northern China. Our synergistic observation analyses and model simulations show that anomalously high humidity promoted aerosol heterogeneous chemistry, along with stagnant airflow and uninterrupted emissions from power plants and petrochemical facilities, contributing to severe haze formation. Also, because of nonlinear production chemistry and titration of ozone in winter, reduced nitrogen oxides resulted in ozone enhancement in urban areas, further increasing the atmospheric oxidizing capacity and facilitating secondary aerosol formation.
DOI10.1126/science.abb7431
WOS KeywordMEXICO-CITY ; MODELING SYSTEM ; APEC BLUE ; AEROSOLS ; HAZE ; HONO ; PHOTOCHEMISTRY ; GASES
Indexed BySCI ; SCI
Language英语
Funding ProjectNSF[AGS-1700727] ; National Key RD Plan[2017YFC0210000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40030203] ; Jet Propulsion Laboratory, California Institute of Technology ; NASA
WOS Research AreaScience & Technology - Other Topics
Funding OrganizationNSF ; National Key RD Plan ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Jet Propulsion Laboratory, California Institute of Technology ; NASA
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000559184400048
PublisherAMER ASSOC ADVANCEMENT SCIENCE
Citation statistics
Cited Times:285[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/15154
Collection粉尘与环境研究室
Corresponding AuthorWang, Yuan
Affiliation1.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian, Shaanxi, Peoples R China
4.CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA
5.CALTECH, Div Engn & Appl Sci, Pasadena, CA 91125 USA
Recommended Citation
GB/T 7714
Le, Tianhao,Wang, Yuan,Liu, Lang,et al. Unexpected air pollution with marked emission reductions during the COVID-19 outbreak in China[J]. SCIENCE,2020,369(6504):702-+.
APA Le, Tianhao.,Wang, Yuan.,Liu, Lang.,Yang, Jiani.,Yung, Yuk L..,...&Seinfeld, John H..(2020).Unexpected air pollution with marked emission reductions during the COVID-19 outbreak in China.SCIENCE,369(6504),702-+.
MLA Le, Tianhao,et al."Unexpected air pollution with marked emission reductions during the COVID-19 outbreak in China".SCIENCE 369.6504(2020):702-+.
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