气候变化领域集成服务门户(CCPortal): Modeling the impact of COVID-19 on air quality in southern California: Implications for future control policies

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DOI	10.5194/acp-21-8693-2021
	Modeling the impact of COVID-19 on air quality in southern California: Implications for future control policies
	Jiang Z.; Shi H.; Zhao B.; Gu Y.; Zhu Y.; Miyazaki K.; Lu X.; Zhang Y.; Bowman K.W.; Sekiya T.; Liou K.-N.
发表日期	2021
ISSN	1680-7316
起始页码	8693
结束页码	8708
卷号	21 期号:11
英文摘要	In response to the coronavirus disease of 2019 (COVID-19), California issued statewide stay-at-home orders, bringing about abrupt and dramatic reductions in air pollutant emissions. This crisis offers us an unprecedented opportunity to evaluate the effectiveness of emission reductions in terms of air quality. Here we use the Weather Research and Forecasting model with Chemistry (WRF-Chem) in combination with surface observations to study the impact of the COVID-19 lockdown measures on air quality in southern California. Based on activity level statistics and satellite observations, we estimate the sectoral emission changes during the lockdown. Due to the reduced emissions, the population-weighted concentrations of fine particulate matter (PM 2.5) decrease by 15 % in southern California. The emission reductions contribute 68 % of the PM 2.5 concentration decrease before and after the lockdown, while meteorology variations contribute the remaining 32 %. Among all chemical compositions, the PM 2.5 concentration decrease due to emission reductions is dominated by nitrate and primary components. For O 3 concentrations, the emission reductions cause a decrease in rural areas but an increase in urban areas; the increase can be offset by a 70 % emission reduction in anthropogenic volatile organic compounds (VOCs). These findings suggest that a strengthened control on primary PM 2.5 emissions and a well-balanced control on nitrogen oxides and VOC emissions are needed to effectively and sustainably alleviate PM 2.5 and O 3 pollution in southern California. © 2021 Zhe Jiang et al.
语种	英语
scopus关键词	air quality; concentration (composition); COVID-19; future prospect; particulate matter; pollution control; source apportionment; weather forecasting; California; United States; Coronavirus
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246827
作者单位	Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Carbon Neutrality Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Pacific Northwest National Laboratory, Richland, WA, United States; Joint Institute for Regional Earth System Science and Engineering, Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Institute of Environment and Sustainability, University of California, Los Angeles, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Petrochina North China Gas Marketing Company, Beijing, China; Nicholas School of the Environment, Duke University, Durham, NC, United States; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
推荐引用方式 GB/T 7714	Jiang Z.,Shi H.,Zhao B.,et al. Modeling the impact of COVID-19 on air quality in southern California: Implications for future control policies[J],2021,21(11).
APA	Jiang Z..,Shi H..,Zhao B..,Gu Y..,Zhu Y..,...&Liou K.-N..(2021).Modeling the impact of COVID-19 on air quality in southern California: Implications for future control policies.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA	Jiang Z.,et al."Modeling the impact of COVID-19 on air quality in southern California: Implications for future control policies".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).