气候变化领域集成服务门户(CCPortal): A measurement and model study on ozone characteristics in marine air at a remote island station and its interaction with urban ozone air quality in Shanghai; China

CCPortal

DOI	10.5194/acp-20-14361-2020
	A measurement and model study on ozone characteristics in marine air at a remote island station and its interaction with urban ozone air quality in Shanghai; China
	Gu Y.; Yan F.; Xu J.; Qu Y.; Gao W.; He F.; Liao H.
发表日期	2020
ISSN	1680-7316
起始页码	14361
结束页码	14375
卷号	20 期号:22
英文摘要	To understand the characteristics and changes of baseline ozone (O3) in oceanic air in eastern China, a 6-year measurement of O3 concentration was conducted from 1 January 2012 to 15 September 2017 at a remote offshore station located on Sheshan Island (SSI) near the megacity of Shanghai. The observed monthly mean O3 concentrations at SSI ranged from 33.4 to 61.4 ppbv during the study period, which were about 80% and 12% higher, respectively, than those measured at downtown and rural sites in Shanghai. Compared to the remarkable O3 increases observed at urban and rural sites in Shanghai, observed O3 concentrations at SSI exhibited statistically insignificant increasing changes (1.12 ppbv yr1, 0:10) during the observation period, suggesting less impacts of anthropogenic emissions on O3 levels in oceanic air. In addition, an insignificant decreasing change (0.72 ppbv yr1, 0:10) was detected in O3 concentrations at SSI in September and October when the influence of regional transport was minimum throughout the year, providing a good proxy to study the baseline oxidation capacity of the oceanic atmosphere. City plumes from Shanghai usually carried higher levels of NOx , resulting in decreased O3 concentrations at SSI during southwesterly and westerly winds. However, In MAM (March May) and JJA (June August), due to the enhanced production of oxygenated volatile organic compounds, O3 could be continuously produced during daytime in aged city plumes, resulting in elevated O3 concentrations transported to SSI. The impacts of the offshore O3 on O3 levels in Shanghai are quantified during an easterly wind dominant episode (1 30 September 2014) using the WRFChem model (Weather Research and Forecasting model coupled with Chemistry). Sensitivity results suggest that O3 in the oceanic air inflows can lead to 20 % 30% increases in urban O3 concentrations, which should be crucially considered in dealing with urban O3 pollution in large coastal cities like Shanghai. © 2020 Copernicus GmbH. All rights reserved.
英文关键词	air quality; anthropogenic source; atmospheric pollution; concentration (composition); megacity; ozone; urban area; weather forecasting; China; Shanghai
语种	英语
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/168947
作者单位	Shanghai Typhoon Institute, Shanghai Meteorological Service, Shanghai, 200030, China; Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Service, Shanghai, 200030, China; East China Air Traffic Management Bureau, Shanghai, 2000135, China; Shanghai Climate Center, Shanghai Meteorological Service, Shanghai, 200030, China; Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Sch. of Environ. Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China
推荐引用方式 GB/T 7714	Gu Y.,Yan F.,Xu J.,et al. A measurement and model study on ozone characteristics in marine air at a remote island station and its interaction with urban ozone air quality in Shanghai; China[J],2020,20(22).
APA	Gu Y..,Yan F..,Xu J..,Qu Y..,Gao W..,...&Liao H..(2020).A measurement and model study on ozone characteristics in marine air at a remote island station and its interaction with urban ozone air quality in Shanghai; China.Atmospheric Chemistry and Physics,20(22).
MLA	Gu Y.,et al."A measurement and model study on ozone characteristics in marine air at a remote island station and its interaction with urban ozone air quality in Shanghai; China".Atmospheric Chemistry and Physics 20.22(2020).