气候变化领域集成服务门户(CCPortal): Detection of stratospheric intrusion events and their role in ozone enhancement at a mountain background site in sub-tropical East Asia

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DOI	10.1016/j.atmosenv.2021.118779
	Detection of stratospheric intrusion events and their role in ozone enhancement at a mountain background site in sub-tropical East Asia
	Ou-Yang C.-F.; Babu S.R.; Lee J.-R.; Yen M.-C.; Griffith S.M.; Lin C.-C.; Chang S.-C.; Lin N.-H.
发表日期	2022
ISSN	1352-2310
卷号	268
英文摘要	In this study, we investigated the influences of stratospheric intrusion (SI) on the tropospheric ozone (O3) at Lulin Atmospheric Background Station (LABS, 2862 m MSL), a representative high-altitude site in East Asia. Thresholds for surface O3, carbon monoxide (CO), and relative humidity (RH) were set to identify SI events at LABS. Accordingly, 3.0% of the observation period was impacted by SI leading to a net O3 enhancement of 14.6 ± 9.6 ppb at LABS. Factors influencing the two most common SI event types affecting LABS, i.e. tropopause folds (major) and tropical cyclones (minor), were discussed. We utilized ERA5 reanalysis products (meteorology and O3) to trace and analyze the pathway and mechanism of these SI types over sub-tropical East Asia. With a conceptual model, we illustrate two driving circulations for SI air at ∼200 hPa that affect subtropical East Asia. SI air generated due to Rossby wave breaks are transported equatorward and downward into the troposphere. The southern westerlies passing south of the Tibetan Plateau can further push the SI air eastward. A SI event in 2007 with a significant O3 enhancement of 43.4 ppb caused by typhoon Nari was detected and discussed to depict the second SI type. © 2021 Elsevier Ltd
关键词	East Asia Ozone Rossby wave breaks Stratospheric intrusion (SI)Tropopause folding Typhoon
语种	英语
scopus关键词	Atmospheric humidity; Carbon monoxide; Clouds; Hurricanes; Intrusion detection; Laboratories; Storms; Tropics; Troposphere; East Asia; High altitude sites; Intrusion events; Rossby wave; Rossby wave break; Stratospheric intrusion; Tropopause folding; Tropospheric ozone; Typhoon; Wave break; Ozone; carbon monoxide; ozone; carbon monoxide; detection method; ozone; relative humidity; Rossby wave; spatiotemporal analysis; stratosphere; subtropical region; tropical cyclone; tropopause; troposphere; typhoon; air; air pollution; airflow; altitude; Article; Asia; autumn; China; circadian rhythm; environmental protection; hurricane; Japan; Korea; ozone layer; Pacific Ocean; relative humidity; Southeast Asia; stratosphere; tropics; troposphere; wind; winter; China; Qinghai-Xizang Plateau
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/248171
作者单位	Department of Atmospheric Sciences, National Central University, Taoyuan, 32001, Taiwan; Department of Chemistry, National Central University, Taoyuan, 32001, Taiwan; Environmental Protection Administration, Executive Yuan, R.O.C. Taiwa, Taipei, 10042, Taiwan; Center for Environmental Monitoring and Technology, National Central University, Taoyuan, 32001, Taiwan
推荐引用方式 GB/T 7714	Ou-Yang C.-F.,Babu S.R.,Lee J.-R.,et al. Detection of stratospheric intrusion events and their role in ozone enhancement at a mountain background site in sub-tropical East Asia[J],2022,268.
APA	Ou-Yang C.-F..,Babu S.R..,Lee J.-R..,Yen M.-C..,Griffith S.M..,...&Lin N.-H..(2022).Detection of stratospheric intrusion events and their role in ozone enhancement at a mountain background site in sub-tropical East Asia.ATMOSPHERIC ENVIRONMENT,268.
MLA	Ou-Yang C.-F.,et al."Detection of stratospheric intrusion events and their role in ozone enhancement at a mountain background site in sub-tropical East Asia".ATMOSPHERIC ENVIRONMENT 268(2022).