气候变化领域集成服务门户(CCPortal): Causes of a continuous summertime O3 pollution event in Jinan; a central city in the North China Plain

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DOI	10.5194/acp-19-3025-2019
	Causes of a continuous summertime O3 pollution event in Jinan; a central city in the North China Plain
	Lyu X.; Wang N.; Guo H.; Xue L.; Jiang F.; Zeren Y.; Cheng H.; Cai Z.; Han L.; Zhou Y.
发表日期	2019
ISSN	16807316
起始页码	3025
结束页码	3042
卷号	19 期号:5
英文摘要	In the summer of 2017, measurements of ozone (O3) and its precursors were carried out at an urban site in Jinan, a central city in the North China Plain (NCP). A continuous O3 pollution event was captured during 4- 11 August, with the maximum hourly O3 mixing ratio reaching 154.1 ppbv. Model simulation indicated that local photochemical formation and regional transport contributed 14:0±2:3 and 18:7±4:0 ppbv h-1, respectively, to the increase in O3 during 09:00-15:00 LT (local time) in this event. For local O3 formation, the calculated OH reactivities of volatile organic compounds (VOCs) and carbon monoxide (CO) were comparable between O3 episodes and non-episodes (p > 0:05), so was the OH reactivity of nitrogen oxides (NOx ). However, the ratio of OH reactivity of VOCs and CO to that of NOx increased from 2:0±0:4 s-1 s1 during nonepisodes to 3:7±0:7 s-1 s1 during O3 episodes, which resulted in the change in the O3 formation mechanism from the VOC-limited regime before the O3 pollution event to the transitional regime during the event. Correspondingly, the simulated local O3 production rate during the event (maximum: 21.3 ppbv h-1) was markedly higher than that before the event (p < 0:05) (maximum: 16.9 ppbv h-1). Given that gasoline and diesel exhaust made large contributions to the abundance of O3 precursors and the O3 production rate, constraint on vehicular emissions is the most effective strategy to control O3 pollution in Jinan. The NCP has been confirmed as a source region of tropospheric O3, where the shift in regimes controlling O3 formation like the case presented in this study can be expected across the entire region, due to the substantial reductions of NOx emissions in recent years. © 2019 Author(s).
语种	英语
scopus关键词	atmospheric pollution; atmospheric transport; carbon monoxide; concentration (composition); nitrogen oxides; oxygen isotope; seasonal variation; source apportionment; urban pollution; China; North China Plain
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/144585
作者单位	Air Quality Studies, Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong, Hong Kong; Division of Environmental Meteorology, Institute of Tropical and Marine Meteorology, China Meteorology Administration, Guangzhou, China; Environment Research Institute, Shandong University, Jinan, China; Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing, China; Department of Environmental Engineering, School of Resource and Environmental Sciences, Wuhan University, Wuhan, China; Department of Environmental Science, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
推荐引用方式 GB/T 7714	Lyu X.,Wang N.,Guo H.,et al. Causes of a continuous summertime O3 pollution event in Jinan; a central city in the North China Plain[J],2019,19(5).
APA	Lyu X..,Wang N..,Guo H..,Xue L..,Jiang F..,...&Zhou Y..(2019).Causes of a continuous summertime O3 pollution event in Jinan; a central city in the North China Plain.Atmospheric Chemistry and Physics,19(5).
MLA	Lyu X.,et al."Causes of a continuous summertime O3 pollution event in Jinan; a central city in the North China Plain".Atmospheric Chemistry and Physics 19.5(2019).