气候变化领域集成服务门户(CCPortal): Impact of long-range atmospheric transport on volatile organic compounds and ozone photochemistry at a regional background site in central China

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DOI	10.1016/j.atmosenv.2020.118093
	Impact of long-range atmospheric transport on volatile organic compounds and ozone photochemistry at a regional background site in central China
	Lei X.; Cheng H.; Peng J.; Jiang H.; Lyu X.; Zeng P.; Wang Z.; Guo H.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	Ozone (O3) photochemistry in remote areas can be altered by the injection of long-range transported air masses which contain volatile organic compounds (VOCs) and nitrogen oxides (NOx). In this study, VOCs and trace gases (i.e., SO2, NO, NO2, CO, and O3) were measured in summer (August) and autumn (October) in 2018 at Jinsha (JSH), a regional background station in central China. A unique pattern that most short-lived VOCs species presented higher mixing ratios in summer while long-lived VOCs showed higher mixing ratios in autumn was observed. Backward trajectory analysis revealed that higher mixing ratios of long-lived hydrocarbons were mostly associated with air masses originating from northern China, while lower concentrations related to air masses passed over southeastern China and the East China Sea. An observation-constrained photochemical box model coupled with Master Chemical Mechanism (PBM-MCM) was applied to simulate the net ozone production. It was found that the net ozone production rate in summer (average: 4.7 ± 0.8 ppbv/h) was higher than that in autumn (average: 2.5 ± 0.1 ppbv/h). O3 formation at JSH switched from transition regime in summer to VOC-constrained regime in autumn due to the high level of NOx in autumn. The relative incremental reactivity (RIR) analysis showed the isoprene was the most reactive VOC species to in-situ O3 production. These findings highlight the impact of long-range air pollution transport on background O3 photochemistry in central China. © 2020
关键词	Central China Long-range atmospheric transport Ozone photochemistry Regional background site VOCs
语种	英语
scopus关键词	Air pollution; Chemical reactions; Mixing; Nitrogen oxides; Ozone; Sulfur dioxide; Volatile organic compounds; Air pollution transport; Backward trajectory analysis; Long-range atmospheric transports; Master chemical mechanism; Ozone production; Photochemical box model; Southeastern china; Transition regimes; Atmospheric movements; benzene; cobalt; ethane; fossil fuel; hydrocarbon; isoprene; molybdenum; nitric oxide; oxygen; ozone; propane; sodium peroxide; volatile organic compound; air mass; concentration (composition); measurement method; mixing ratio; nitrogen oxides; ozone; photochemistry; pollutant transport; trace gas; volatile organic compound; aerosol; atmosphere; atmospheric transport; autumn; China; comparative study; controlled study; flame ionization detection; limit of detection; optical depth; photochemistry; priority journal; quality control; seasonal variation; solar radiation; summer; textile industry; topography; uncertainty; East China Sea; Pacific Ocean
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/248704
作者单位	School of Resource and Environmental Sciences, Wuhan University, Wuhan, China; Air Quality Studies, Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, China
推荐引用方式 GB/T 7714	Lei X.,Cheng H.,Peng J.,et al. Impact of long-range atmospheric transport on volatile organic compounds and ozone photochemistry at a regional background site in central China[J],2021,246.
APA	Lei X..,Cheng H..,Peng J..,Jiang H..,Lyu X..,...&Guo H..(2021).Impact of long-range atmospheric transport on volatile organic compounds and ozone photochemistry at a regional background site in central China.ATMOSPHERIC ENVIRONMENT,246.
MLA	Lei X.,et al."Impact of long-range atmospheric transport on volatile organic compounds and ozone photochemistry at a regional background site in central China".ATMOSPHERIC ENVIRONMENT 246(2021).