气候变化领域集成服务门户(CCPortal): Ozone and its precursors in a high-elevation and highly forested region in central China: Origins, in-situ photochemistry and implications of regional transport

CCPortal

DOI	10.1016/j.atmosenv.2021.118540
	Ozone and its precursors in a high-elevation and highly forested region in central China: Origins, in-situ photochemistry and implications of regional transport
	Lyu X.; Guo H.; Zhang W.; Cheng H.; Yao D.; Lu H.; Zhang L.; Zeren Y.; Liu X.; Qian Z.; Wang S.
发表日期	2021
ISSN	1352-2310
卷号	259
英文摘要	Atmospheric chemistry observation and modelling in alpine areas have strong indication of regional air quality. In this study, one-month continuous ozone (O3) measurement at a high-elevation and highly forested site in central China, in combination with observations at similar stations, indicated elevated O3 levels in the free troposphere (FT) over China. Uninterrupted O3 injuries to the old-growth forest in the study region were expected. FT O3 overwhelmed daytime photochemical formation at the site, and the transport of O3 from the north (e.g., Guanzhong Plain) was most significant. Air masses from the adjacent southwest and south regions (e.g., Chongqing) contained higher levels of nitric oxide, sulfur dioxide, fine particles and volatile organic compounds (VOCs) in association with vehicular and industrial emissions. In contrast, air masses from the northeast (e.g., North China Plain) were laden with combustion tracers. The in-situ photochemistry modelling confirmed weak O3 formation at the site. For the reasons, the insufficient nitrogen oxides suppressed transformation of peroxyl radicals to alkoxy and hydroxyl radicals, resulting in considerable losses of peroxyl radicals via self-reactions. VOCs showed little impact on in-situ O3 production, and accounted for net consumption of OH, with isoprene as the most predominant OH depleting species. This study fills the gaps in observation of O3 and its precursors and modelling of in-situ photochemistry in high-elevation regions of central China, and provides hints for the impacts of transport on air pollution in this region. © 2021 Elsevier Ltd
关键词	Background site High-elevation station In-situ photochemistry Ozone Volatile organic compounds
语种	英语
scopus关键词	Air quality; Atmospheric chemistry; Forestry; Industrial emissions; Nitric oxide; Nitrogen oxides; Ozone; Sulfur dioxide; Air mass; Background site; Central chinas; Free troposphere; High elevation; High-elevation station; In-situ photochemistry; OH$+-$; Peroxyl radical; Volatile organics; Volatile organic compounds; hydroxyl radical; isoprene; nitric oxide; nitrogen oxide; ozone; peroxy radical; sulfur oxide; volatile organic compound; atmospheric pollution; combustion; nitrogen oxides; old-growth forest; ozone; photochemistry; spatiotemporal analysis; tracer; troposphere; air pollutant; air pollution; Article; atmospheric transport; chemical analysis; China; circadian rhythm; combustion; concentration (parameter); controlled study; forest; meteorology; model; particulate matter 2.5; photochemistry; pollution transport; precursor; simulation; solar radiation; troposphere; China; Chongqing; Guanzhong Plain; North China Plain; Shaanxi
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/248356
作者单位	Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong; School of Resource and Environmental Sciences, Wuhan University, Wuhan, China
推荐引用方式 GB/T 7714	Lyu X.,Guo H.,Zhang W.,et al. Ozone and its precursors in a high-elevation and highly forested region in central China: Origins, in-situ photochemistry and implications of regional transport[J],2021,259.
APA	Lyu X..,Guo H..,Zhang W..,Cheng H..,Yao D..,...&Wang S..(2021).Ozone and its precursors in a high-elevation and highly forested region in central China: Origins, in-situ photochemistry and implications of regional transport.ATMOSPHERIC ENVIRONMENT,259.
MLA	Lyu X.,et al."Ozone and its precursors in a high-elevation and highly forested region in central China: Origins, in-situ photochemistry and implications of regional transport".ATMOSPHERIC ENVIRONMENT 259(2021).