Unexpected air pollution with marked emission reductions during the COVID-19 outbreak in China

doi:10.1126/science.abb7431

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, Tianhao 1; Wang, Yuan 1; Liu, Lang 2,3; Yang, Jiani 1; Yung, Yuk L.1; Li, Guohui 2,3; Seinfeld, John H.4,5
通讯作者	Wang, Yuan(yuan.wang@caltech.edu)
	2020-08-07
发表期刊	SCIENCE
ISSN	0036-8075
卷号	369 期号:6504 页码:702-+
摘要	The 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.
DOI	10.1126/science.abb7431
关键词[WOS]	MEXICO-CITY ; MODELING SYSTEM ; APEC BLUE ; AEROSOLS ; HAZE ; HONO ; PHOTOCHEMISTRY ; GASES
收录类别	SCI ; SCI
语种	英语
资助项目	NSF[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研究方向	Science & Technology - Other Topics
项目资助者	NSF ; National Key RD Plan ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Jet Propulsion Laboratory, California Institute of Technology ; NASA
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000559184400048
出版者	AMER ASSOC ADVANCEMENT SCIENCE
引用统计	被引频次：541[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15154
专题	粉尘与环境研究室
通讯作者	Wang, Yuan
作者单位	1.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
推荐引用方式 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-+.