气候变化领域集成服务门户(CCPortal): Tropospheric Ozone Variability Over Hong Kong Based on Recent 20 years (2000

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DOI	10.1029/2020JD033054
	Tropospheric Ozone Variability Over Hong Kong Based on Recent 20 years (2000–2019) Ozonesonde Observation
	Liao Z.; Ling Z.; Gao M.; Sun J.; Zhao W.; Ma P.; Quan J.; Fan S.
发表日期	2021
ISSN	2169897X
卷号	126 期号:3
英文摘要	The recent 20 years (2000–2019) ozonesonde profiles recorded at the Hong Kong Observatory are analyzed to study the Tropospheric Ozone (TropO3) variability over Hong Kong, South China. The TropO3 profiles are described without the constraints of traditional monthly averages; they are clustered based on a Self-Organizing Map (SOM) to explore the short-term variability, and separated into two 10-year periods to investigate the long-term variability based on pooled statistical analysis. The roles of precursor emissions, dynamic transport, and photochemical formation in multiple-timescale TropO3 variability are further evaluated with the aid of meteorological and satellite data, surface observation, emission inventory, and backward trajectory analysis. The results suggest that TropO3 over Hong Kong has a seasonal and vertical distribution featuring a widely recognized spring maximum. The SOM-based clustering analysis emphasizes a strong dependence of short-term variability in TropO3 profile patterns on cross-latitude transport conditions, including rich-O3 transport from midlatitude region and poor-O3 transport from tropics. However, high O3 levels throughout the troposphere (usually in early spring) are largely due to the combination of stratospheric intrusion and biomass burning. During the whole study period, the O3 concentrations have increased substantially in the lower troposphere. Springtime wildfire-related emissions over the upwind Indochina Peninsula are responsible for the lower free-tropospheric O3 increases. In contrast, the boundary-layer O3 uptrends with a larger increasing rate near the surface are mostly attributed to the reduced NO titration effect due to the sharp reduction of NOx emissions. © 2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185508
作者单位	Institute of Urban Meteorology, Chinese Meteorological Administration, Beijing, China; School of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou, China; Department of Geography, Hong Kong Baptist University, Hong Kong; Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary, Guangzhou, China; Key Laboratory of Urban Ecological Environmental Simulation and Protection of Ministry of Environmental Protection, South China Institute of Environmental Sciences, Ministry of Ecology and Environment of the PRC, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
推荐引用方式 GB/T 7714	Liao Z.,Ling Z.,Gao M.,等. Tropospheric Ozone Variability Over Hong Kong Based on Recent 20 years (2000–2019) Ozonesonde Observation[J],2021,126(3).
APA	Liao Z..,Ling Z..,Gao M..,Sun J..,Zhao W..,...&Fan S..(2021).Tropospheric Ozone Variability Over Hong Kong Based on Recent 20 years (2000–2019) Ozonesonde Observation.Journal of Geophysical Research: Atmospheres,126(3).
MLA	Liao Z.,et al."Tropospheric Ozone Variability Over Hong Kong Based on Recent 20 years (2000–2019) Ozonesonde Observation".Journal of Geophysical Research: Atmospheres 126.3(2021).