气候变化领域集成服务门户(CCPortal): Impacts of Traffic Reductions Associated With COVID-19 on Southern California Air Quality

CCPortal

DOI	10.1029/2020GL090164
	Impacts of Traffic Reductions Associated With COVID-19 on Southern California Air Quality
	Parker H.A.; Hasheminassab S.; Crounse J.D.; Roehl C.M.; Wennberg P.O.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	On 19 March 2020, California put in place Stay-At-Home orders to reduce the spread of SARS-CoV-2. As a result, decreases up to 50% in traffic occurred across the South Coast Air Basin (SoCAB). We report that, compared to the 19 March to 30 June period of the last 5 years, the 2020 concentrations of PM2.5 and NOx showed an overall reduction across the basin. O3 concentrations decreased in the western part of the basin and generally increased in the downwind areas. The NOx decline in 2020 (approximately 27% basin-wide) is in addition to ongoing declines over the last two decades (on average 4% less than the −6.8% per year afternoon NO2 concentration decrease) and provides insight into how air quality may respond over the next few years of continued vehicular reductions. The modest changes in O3 suggests additional mitigation will be necessary to comply with air quality standards. ©2020. The Authors.
英文关键词	Air quality; Nitrogen oxides; Basin wide; California; South Coast Air basins; Southern California; Traffic reduction; Air quality standards; air quality; concentration (composition); emission control; mitigation; nitrate; ozone; particulate matter; viral disease; California; South Coast Air Basin; United States; SARS coronavirus
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169371
作者单位	Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; South Coast Air Quality Management District, Diamond Bar, CA, United States; Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Parker H.A.,Hasheminassab S.,Crounse J.D.,et al. Impacts of Traffic Reductions Associated With COVID-19 on Southern California Air Quality[J],2020,47(23).
APA	Parker H.A.,Hasheminassab S.,Crounse J.D.,Roehl C.M.,&Wennberg P.O..(2020).Impacts of Traffic Reductions Associated With COVID-19 on Southern California Air Quality.Geophysical Research Letters,47(23).
MLA	Parker H.A.,et al."Impacts of Traffic Reductions Associated With COVID-19 on Southern California Air Quality".Geophysical Research Letters 47.23(2020).