气候变化领域集成服务门户(CCPortal): Meteorology and topographic influences on nocturnal ozone increase during the summertime over Shaoguan, China

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DOI	10.1016/j.atmosenv.2021.118459
	Meteorology and topographic influences on nocturnal ozone increase during the summertime over Shaoguan, China
	He Y.; Wang H.; Wang H.; Xu X.; Li Y.; Fan S.
发表日期	2021
ISSN	1352-2310
卷号	256
英文摘要	Ozone (O3) is a typical photochemical product, generally with a maximum value in the late afternoon and a minimum value at night. This study aimed to investigate the variation characteristics of nocturnal O3 in a subtropical urban city (Shaoguan, Guangdong Province, China). The measurement campaigns were conducted from 23 July to July 28, 2020. O3 lidar, aerosol lidar, and wind profile lidar were utilised to detect the vertical distributions of the O3 concentrations, aerosol extinction coefficient, and wind velocity. The topographic features, pollutant data (PM10, PM2.5, O3, SO2, NO2, and CO), and meteorological parameters (temperature, humidity, wind speed, and wind direction) were also analysed. The results showed that the concentration of nocturnal O3 over Shaoguan peaked at midnight. The horizontal wind was dominated by southwest and south winds, and the vertical wind was dominated by downdrafts during the fixed-point observations in Shaoguan. Horizontal transport might have a high impact on the increase in the nocturnal O3 because of high pollutant emissions in upwind cities. This was further justified by the 24-h back trajectories of the air mass generated by the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model. Vertical transport of O3 in the lower or middle troposphere might be induced by the subtropical high and nocturnal mountain-valley breezes. Thus, the vertical mixing of O3 affects the O3 concentration at night. © 2021 Elsevier Ltd
关键词	Horizontal transport Mountain-valley breezes Nocturnal O3 O3 lidar Wind profile
语种	英语
scopus关键词	Aerosols; Air pollution; Landforms; Optical radar; Ozone; Tropics; Guangdong Province; Horizontal transport; Minimum value; Mountain-valley breeze; Nocturnal O3; O3 lidar; Photochemicals; Urban cities; Variation characteristics; Wind profiles; Wind; carbon monoxide; nitrogen dioxide; ozone; sulfur dioxide; aerosol; air mass; concentration (composition); ozone; summer; topography; troposphere; vertical distribution; vertical mixing; air pollutant; air temperature; Article; China; concentration (parameter); humidity; meteorology; night; particulate matter 10; particulate matter 2.5; priority journal; summer; wind; wind speed; China
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/248407
作者单位	School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, 519082, China; Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary, Key Laboratory of Tropical Atmosphere-Ocean System, Ministry of Education, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, China
推荐引用方式 GB/T 7714	He Y.,Wang H.,Wang H.,et al. Meteorology and topographic influences on nocturnal ozone increase during the summertime over Shaoguan, China[J],2021,256.
APA	He Y.,Wang H.,Wang H.,Xu X.,Li Y.,&Fan S..(2021).Meteorology and topographic influences on nocturnal ozone increase during the summertime over Shaoguan, China.ATMOSPHERIC ENVIRONMENT,256.
MLA	He Y.,et al."Meteorology and topographic influences on nocturnal ozone increase during the summertime over Shaoguan, China".ATMOSPHERIC ENVIRONMENT 256(2021).