气候变化领域集成服务门户(CCPortal): Drivers for the poor air quality conditions in North China Plain during the COVID-19 outbreak

CCPortal

DOI	10.1016/j.atmosenv.2020.118103
	Drivers for the poor air quality conditions in North China Plain during the COVID-19 outbreak
	Li M.; Wang T.; Xie M.; Li S.; Zhuang B.; Fu Q.; Zhao M.; Wu H.; Liu J.; Saikawa E.; Liao K.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	China's lockdown to control COVID-19 brought significant declines in air pollutant emissions, but haze was still a serious problem in North China Plain (NCP) during late-January to mid-February of 2020. We seek the potential causes for the poor air quality in NCP combining satellite data, ground measurements and model analyses. Efforts to constrain COVID-19 result in a drop-off of primary gaseous pollutants, e.g., −42.4% for surface nitrogen dioxide (NO2) and −38.9% for tropospheric NO2 column, but fine particulate matter (PM25) still remains high and ozone (O3) even increases sharply (+84.1%). Stagnant weather during COVID-19 outbreak, e.g., persistent low wind speed, frequent temperature inversion and wind convergence, is one of the major drivers for the poor air quality in NCP. The surface PM2.5 levels vary between −12.9~+15.1% in NCP driven by the varying climate conditions between the years 2000 and 2020. Besides, the persistent PM2.5 pollution might be maintained by the still intensive industrial and residential emissions (primary PM2.5), and increased atmospheric oxidants (+26.1% for ozone and +29.4% for hydroxyl radical) in response to the NO2 decline (secondary PM2.5). Further understanding the nonlinear response between atmospheric secondary aerosols and NOx emissions is meaningful to cope with the emerging air pollution problems in China. © 2020 Elsevier Ltd
关键词	Air quality Atmospheric oxidants COVID-19 North China Plain Stagnant weather
语种	英语
scopus关键词	Air pollution control; Air quality; Fog; Industrial emissions; Ozone; Wind; Air pollutant emission; Atmospheric oxidants; Fine particulate matter; Ground measurements; Non-linear response; Pollution problems; Residential emissions; Temperature inversions; Nitrogen oxides; carbon monoxide; dinitrogen pentoxide; hydroxyl radical; nitric acid; nitrogen dioxide; ozone; sulfur dioxide; air quality; atmospheric pollution; climate conditions; COVID-19; ground-based measurement; particulate matter; satellite data; aerosol; air pollutant; air pollution; air pollution control; air quality; China; climate; coronavirus disease 2019; haze; particulate matter 2.5; priority journal; temperature; weather; wind; wind speed; China; North China Plain
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248703
作者单位	School of Atmospheric Sciences, Nanjing University, Nanjing, 210023, China; Shanghai Environmental Monitoring Center, Shanghai, 200030, China; School of Environment, Nanjing University, Nanjing, 210023, China; Department of Geography and Planning, University of Toronto, Toronto, Canada; Department of Environmental Sciences, Emory University, Atlanta, United States; Fujian Meteorological Institute, Fuzhou, 350001, China
推荐引用方式 GB/T 7714	Li M.,Wang T.,Xie M.,et al. Drivers for the poor air quality conditions in North China Plain during the COVID-19 outbreak[J],2021,246.
APA	Li M..,Wang T..,Xie M..,Li S..,Zhuang B..,...&Liao K..(2021).Drivers for the poor air quality conditions in North China Plain during the COVID-19 outbreak.ATMOSPHERIC ENVIRONMENT,246.
MLA	Li M.,et al."Drivers for the poor air quality conditions in North China Plain during the COVID-19 outbreak".ATMOSPHERIC ENVIRONMENT 246(2021).