气候变化领域集成服务门户(CCPortal): Atmospheric oxidation capacity and ozone pollution mechanism in a coastal city of southeastern China: analysis of a typical photochemical episode by an observation-based model

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DOI	10.5194/acp-22-2173-2022
	Atmospheric oxidation capacity and ozone pollution mechanism in a coastal city of southeastern China: analysis of a typical photochemical episode by an observation-based model
	Liu, Taotao; Hong, Youwei; Li, Mengren; Xu, Lingling; Chen, Jinsheng; Bian, Yahui; Yang, Chen; Dan, Yangbin; Zhang, Yingnan; Xue, Likun; Zhao, Min; Huang, Zhi; Wang, Hong
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	2173
结束页码	2190
卷号	22 期号:3 页码:18
英文摘要	A typical multi-day ozone (O-3) pollution event was chosen to explore the atmospheric oxidation capacity (AOC), OH reactivity, radical chemistry, and O-3 pollution mechanism in a coastal city of southeastern China, with an observation-based model coupled to the Master Chemical Mechanism (OBM-MCM). The hydroxyl radical (OH) was the predominant oxidant (90 +/- 25 %) for daytime AOC, while the NO3 radical played an important role in AOC during the nighttime (72 +/- 9 %). Oxygenated volatile organic compounds (OVOCs; 30 +/- 8 %), NO2 (29 +/- 8 %), and CO (25 +/- 5 %) were the dominant contributors to OH reactivity, accelerating the production of O-3 and recycling of ROx radicals (ROx = OH + HO2+ RO2). Photolysis of nitrous acid (HONO, 33 +/- 14 %), O-3 (25 +/- 13 %), formaldehyde (HCHO, 20 +/- 5 %), and other OVOCs (17 +/- 2 %) was a major ROx source, which played an initiation role in atmospheric oxidation processes. Combined with regional transport analysis, the reasons for this O-3 episode were the accumulation of local photochemical production and regional transport. The results of sensitivity analysis showed that volatile organic compounds (VOCs) were the limiting factor of radical recycling and O-3 formation, and the 5 % reduction of O-3 would be achieved by decreasing 20 % anthropogenic VOCs. Controlling emissions of aromatics, alkenes, and alkanes with >= 4 carbons was beneficial for ozone pollution mitigation. The findings of this study provide significant guidance for emission reduction and regional collaboration for future photochemical pollution control in the relatively clean coastal cities of China and similar countries.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000759199500001
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/273124
作者单位	Chinese Academy of Sciences; Institute of Urban Environment, CAS; Chinese Academy of Sciences; Institute of Urban Environment, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Shandong University
推荐引用方式 GB/T 7714	Liu, Taotao,Hong, Youwei,Li, Mengren,et al. Atmospheric oxidation capacity and ozone pollution mechanism in a coastal city of southeastern China: analysis of a typical photochemical episode by an observation-based model[J],2022,22(3):18.
APA	Liu, Taotao.,Hong, Youwei.,Li, Mengren.,Xu, Lingling.,Chen, Jinsheng.,...&Wang, Hong.(2022).Atmospheric oxidation capacity and ozone pollution mechanism in a coastal city of southeastern China: analysis of a typical photochemical episode by an observation-based model.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(3),18.
MLA	Liu, Taotao,et al."Atmospheric oxidation capacity and ozone pollution mechanism in a coastal city of southeastern China: analysis of a typical photochemical episode by an observation-based model".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.3(2022):18.