气候变化领域集成服务门户(CCPortal): Spatiotemporal variation of surface ozone and its causes in Beijing, China since 2014

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DOI	10.1016/j.atmosenv.2021.118556
	Spatiotemporal variation of surface ozone and its causes in Beijing, China since 2014
	Ren J.; Hao Y.; Simayi M.; Shi Y.; Xie S.
发表日期	2021
ISSN	1352-2310
卷号	260
英文摘要	The surface ozone (O3) spatiotemporal distribution, variations and its causes in Beijing in 2014–2020 are revealed by quantitative estimates of the trends of 12 ozone metrics relevant to human health and tropospheric NO2 and formaldehyde (HCHO) column concentration, based on the air quality monitoring network data and satellite retrievals from the Ozone Monitoring Instrument (OMI). Results showed that the maximum O3 concentrations decreased slightly since 2014. The annual 90th percentile of the daily maximum 8-h average (MDA8) O3 and the “ozone-season” (April–September) MDA8 decreased by 0.32 and 0.19 μg m−3 year−1, respectively. The changes in Beijing contrast the widespread and significant O3 increases in the Beijing–Tianjin–Hebei region in recent years. However, significant positive trends in MDA8-90th and ozone-season MDA8 were observed in 7% and 14% of monitoring sites in Beijing (p < 0.05), most of which are located in urban areas and suburbs close to urban areas. The spatial distribution of high O3 values in Beijing has changed significantly. The areas with high O3 concentrations shifted from the northern suburbs (Changping and Miyun districts) to the northeastern and southwestern suburbs and the east of the central urban area. The ozone-season NO2 and HCHO tropospheric columns showed reductions of 4.2% and 0.4% year−1, respectively, from 2014 to 2019 in Beijing, which suggested that the decrease in NOX emissions was much greater than the decrease in volatile organic compound (VOC) emissions. Such an extremely inappropriate control ratio of ozone precursor NOX/VOCs led to an overall trend of slow declining fluctuations of O3 and an increasing trend of individual sites in Beijing. Obviously, the reduction of VOCs in Beijing is far from sufficient, and the significant decrease of Beijing's O3 concentration can only be achieved by a drastically reduction in VOC emissions. © 2021 Elsevier Ltd
关键词	Beijing China Emission reductions MDA8 OMI Spatiotemporal variation Surface ozone
语种	英语
scopus关键词	Air quality; Emission control; Nitrogen oxides; Spatial distribution; Troposphere; Ultraviolet spectrometers; Urban growth; Volatile organic compounds; % reductions; Beijing china; Emission reduction; MDA8; NO $-2$; Ozone monitoring instruments; Spatio-temporal variation; Surface ozone; Urban areas; Volatile organic compound emission; Ozone; formaldehyde; nitrogen dioxide; ozone; volatile organic compound; air quality; formaldehyde; ozone; quantitative analysis; spatial distribution; spatiotemporal analysis; volatile organic compound; air monitoring; air quality; Article; China; controlled study; human; season; spatiotemporal analysis; trend study; troposphere; urban area; Beijing [China]; China
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/248344
作者单位	College of Environmental Sciences and Engineering, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing, 100871, China; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen-PSI5232, Switzerland
推荐引用方式 GB/T 7714	Ren J.,Hao Y.,Simayi M.,et al. Spatiotemporal variation of surface ozone and its causes in Beijing, China since 2014[J],2021,260.
APA	Ren J.,Hao Y.,Simayi M.,Shi Y.,&Xie S..(2021).Spatiotemporal variation of surface ozone and its causes in Beijing, China since 2014.ATMOSPHERIC ENVIRONMENT,260.
MLA	Ren J.,et al."Spatiotemporal variation of surface ozone and its causes in Beijing, China since 2014".ATMOSPHERIC ENVIRONMENT 260(2021).