气候变化领域集成服务门户(CCPortal): Explicit modeling of isoprene chemical processing in polluted air masses in suburban areas of the Yangtze River Delta region: Radical cycling and formation of ozone and formaldehyde

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DOI	10.5194/acp-21-5905-2021
	Explicit modeling of isoprene chemical processing in polluted air masses in suburban areas of the Yangtze River Delta region: Radical cycling and formation of ozone and formaldehyde
	Zhang K.; Huang L.; Li Q.; Huo J.; Duan Y.; Wang Y.; Yaluk E.; Wang Y.; Fu Q.; Li L.
发表日期	2021
ISSN	1680-7316
起始页码	5905
结束页码	5917
卷号	21 期号:8
英文摘要	In recent years, ozone pollution has become one of the most severe environmental problems in China. Evidence from observations have showed increased frequency of high O3 levels in suburban areas of the Yangtze River Delta (YRD) region. To better understand the formation mechanism of local O3 pollution and investigate the potential role of isoprene chemistry in the budgets of ROx .OHCHO2 C RO2/ radicals, synchronous observations of volatile organic compounds (VOCs), formaldehyde (HCHO), and meteorological parameters were conducted at a suburban site of the YRD region in 2018. Five episodes with elevated O3 concentrations under stagnant meteorological conditions were identified; an observation-based model (OBM) with the Master Chemical Mechanism was applied to analyze the photochemical processes during these high O3 episodes. The high levels of O3, nitrogen oxides (NOx ), and VOCs facilitated strong production and recycling of ROx radicals with the photolysis of oxygenated VOCs (OVOCs) being the primary source. Our results suggest that local biogenic isoprene is important in suburban photochemical processes. Removing isoprene could drastically slow down the efficiency of ROx recycling and reduce the concentrations of ROx . In addition, the absence of isoprene chemistry could further lead to a decrease in the daily average concentrations of O3 and HCHO by 34% and 36 %, respectively. Therefore, this study emphasizes the importance of isoprene chemistry in the suburban atmosphere, particularly with the participation of anthropogenic NOx . Moreover, our results provide insights into the radical chemistry that essentially drives the formation of secondary pollutants (e.g., O3 and HCHO) in suburban areas of the YRD region. © 2021 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	air mass; atmospheric pollution; chemical process; formaldehyde; isoprene; nitrogen oxides; ozone; suburban area; volatile organic compound; China; Yangtze Delta
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/246962
作者单位	School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China; Key Laboratory of Organic Compound Pollution Control Engineering, Shanghai University, Shanghai, 200444, China; Shanghai Environmental Monitoring Center, Shanghai, 200235, China; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States
推荐引用方式 GB/T 7714	Zhang K.,Huang L.,Li Q.,et al. Explicit modeling of isoprene chemical processing in polluted air masses in suburban areas of the Yangtze River Delta region: Radical cycling and formation of ozone and formaldehyde[J],2021,21(8).
APA	Zhang K..,Huang L..,Li Q..,Huo J..,Duan Y..,...&Li L..(2021).Explicit modeling of isoprene chemical processing in polluted air masses in suburban areas of the Yangtze River Delta region: Radical cycling and formation of ozone and formaldehyde.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(8).
MLA	Zhang K.,et al."Explicit modeling of isoprene chemical processing in polluted air masses in suburban areas of the Yangtze River Delta region: Radical cycling and formation of ozone and formaldehyde".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.8(2021).