气候变化领域集成服务门户(CCPortal): Impacts of the COVID-19 economic slowdown on ozone pollution in the U.S.

CCPortal

DOI	10.1016/j.atmosenv.2021.118713
	Impacts of the COVID-19 economic slowdown on ozone pollution in the U.S.
	Campbell P.C.; Tong D.; Tang Y.; Baker B.; Lee P.; Saylor R.; Stein A.; Ma S.; Lamsal L.; Qu Z.
发表日期	2021
ISSN	1352-2310
卷号	264
英文摘要	In this work, we use observations and experimental emissions in a version of NOAA's National Air Quality Forecasting Capability to show that the COVID-19 economic slowdown led to disproportionate impacts on near-surface ozone concentrations across the contiguous U.S. (CONUS). The data-fusion methodology used here includes both U.S. EPA Air Quality System ground and the NASA Aura satellite Ozone Monitoring Instrument (OMI) NO2 observations to infer the representative emissions changes due to the COVID-19 economic slowdown in the U.S. Results show that there were widespread decreases in anthropogenic (e.g., NOx) emissions in the U.S. during March–June 2020, which led to widespread decreases in ozone concentrations in the rural regions that are NOx-limited, but also some localized increases near urban centers that are VOC-limited. Later in June–September, there were smaller decreases, and potentially some relative increases in NOx emissions for many areas of the U.S. (e.g., south-southeast) that led to more extensive increases in ozone concentrations that are partly in agreement with observations. The widespread NOx emissions changes also alters the O3 photochemical formation regimes, most notably the NOx emissions decreases in March–April, which can enhance (mitigate) the NOx-limited (VOC-limited) regimes in different regions of CONUS. The average of all AirNow hourly O3 changes for 2020–2019 range from about +1 to −4 ppb during March–September, and are associated with predominantly urban monitoring sites that demonstrate considerable spatiotemporal variability for the 2020 ozone changes compared to the previous five years individually (2015–2019). The simulated maximum values of the average O3 changes for March–September range from about +8 to −4 ppb (or +40 to −10%). Results of this work have implications for the use of widespread controls of anthropogenic emissions, particularly those from mobile sources, used to curb ozone pollution under the current meteorological and climate conditions in the U.S. © 2021 The Authors
关键词	CMAQ Model COVID-19 economic slowdown National Air Quality Forecast Capability Ozone pollution in the U.S.
语种	英语
scopus关键词	Air quality; NASA; Nitrogen oxides; Ozone; Ultraviolet spectrometers; Urban growth; CMAQ model; COVID-19 economic slowdown; Economic slowdowns; Emission change; National Air Quality Forecast Capability; NO x; NO x emission; Ozone concentration; Ozone pollution; Ozone pollution in the US; Data fusion; carbon monoxide; nitrogen dioxide; nitrogen oxide; ozone; volatile organic compound; anthropogenic source; concentration (composition); COVID-19; human activity; monitoring system; nitrate; satellite data; urban area; volatile organic compound; air pollution; Article; climate; comparative study; controlled study; coronavirus disease 2019; economic aspect; exhaust gas; human; lockdown; meteorological phenomena; observational method; ozone layer; rural area; simulation; United States; urban area
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/248225
作者单位	Center for Spatial Information Science and Systems, Cooperative Institute for Satellite Earth System Studies, George Mason University, Fairfax, VA, United States; Office of Oceanic and Atmospheric Research, Air Resources Laboratory, National Oceanic and Atmospheric Administration, College Park, MD, United States; Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, VA, United States; Universities Space Research Association, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Harvard University, Department of Engineering and Applied Science, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Campbell P.C.,Tong D.,Tang Y.,et al. Impacts of the COVID-19 economic slowdown on ozone pollution in the U.S.[J],2021,264.
APA	Campbell P.C..,Tong D..,Tang Y..,Baker B..,Lee P..,...&Qu Z..(2021).Impacts of the COVID-19 economic slowdown on ozone pollution in the U.S..ATMOSPHERIC ENVIRONMENT,264.
MLA	Campbell P.C.,et al."Impacts of the COVID-19 economic slowdown on ozone pollution in the U.S.".ATMOSPHERIC ENVIRONMENT 264(2021).