气候变化领域集成服务门户(CCPortal): Assessment of atmospheric photochemical reactivity in the Yangtze River Delta using a photochemical box model

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DOI	10.1016/j.atmosres.2020.105088
	Assessment of atmospheric photochemical reactivity in the Yangtze River Delta using a photochemical box model
	Huang W.; Zhao Q.; Liu Q.; Chen F.; He Z.; Guo H.; Ling Z.
发表日期	2020
ISSN	0169-8095
卷号	245
英文摘要	We investigated variations of ozone (O3), its precursors, and their influence on photochemical reactivity by applying a photochemical box model to field data from three cities (Nantong, Xuzhou, and Yancheng) in the Yangtze River Delta. The photochemical box model was coupled with the near-explicit mechanism (Master Chemical Mechanism, MCM version 3.2) for the degradation of volatile organic compounds (VOCs), which provided detailed descriptions of different pathways for photochemical O3 formation and related atmospheric photochemical reactivity based on observed data. Alkanes were the most important VOC group overall, while the contributions of aromatics and alkenes varied by city. The highest levels of O3 and VOCs (indicating more severe photochemical pollution) were found in Nantong. This induced a higher contribution of O3 photolysis to HOx production and promoted OH-HO2 propagation, resulting in maximum HOx (OH + HO2) and higher O3 formation rates from RO2 + NO. In Yangchen, the highest occurrence of alkenes resulted in the maximum contribution of ozonolysis to HOx production. In Nantong, the highest levels of NO2 and HO2 led to the greatest contributions of OH + NO2 and HO2 + HO2 to HOx destruction. However, the longest OH chain length was found in Xuzhou, suggesting that O3 production was most efficient there. Although vehicular emissions were the dominant sources of VOCs overall, industrial emissions in Nantong, solvent usage in Xuzhou and vehicular emissions in Yancheng were the most important VOC sources for O3 formation. These results show that appropriate photochemical pollution control measures should consider both the emission sources and photochemical reactivities of VOCs. © 2020
关键词	Atmospheric chemistry Industrial emissions Nitrogen oxides Olefins Organic solvents Ozone Photolysis Pollution control River pollution Volatile organic compounds Control measures Emission sources Master chemical mechanism Photochemical box model Photochemical pollution Photochemical reactivity Vehicular emission Yangtze river delta Air pollution atmospheric chemistry atmospheric modeling chemical reaction ozone photochemistry traffic emission volatile organic compound China Jiangsu Nantong Xuzhou Yancheng Yangtze Delta
语种	英语
来源机构	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132366
推荐引用方式 GB/T 7714	Huang W.,Zhao Q.,Liu Q.,et al. Assessment of atmospheric photochemical reactivity in the Yangtze River Delta using a photochemical box model[J]. Atmospheric Research,2020,245.
APA	Huang W..,Zhao Q..,Liu Q..,Chen F..,He Z..,...&Ling Z..(2020).Assessment of atmospheric photochemical reactivity in the Yangtze River Delta using a photochemical box model.,245.
MLA	Huang W.,et al."Assessment of atmospheric photochemical reactivity in the Yangtze River Delta using a photochemical box model".245(2020).