气候变化领域集成服务门户(CCPortal): The impact of peripheral circulation characteristics of typhoon on sustained ozone episodes over the Pearl River Delta region, China

CCPortal

DOI	10.5194/acp-22-3861-2022
	The impact of peripheral circulation characteristics of typhoon on sustained ozone episodes over the Pearl River Delta region, China
	Li, Ying; Zhao, Xiangjun; Deng, Xuejiao; Gao, Jinhui
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	3861
结束页码	3873
卷号	22 期号:6 页码:13
英文摘要	The peripheral circulation of typhoon forms sustained ozone episodes. However, how it impacts the day-to-day ozone pollution levels during the episodes has not been clearly studied, which is crucial for better prediction of the daily ozone variation. In this study, the analysis of ground observation, wind profile data, and model simulation is integrated. By analysing the wind profile radar observations, we found a weak wind deepening (WWD; vertical depth of the weak winds increased), more correlated with the ground-level ozone variation than surface weak wind. Long-term statistical analyses showed that the WWD is a common weather phenomenon in the peripheral subsidence region of typhoons and is generally accompanied by ozone pollution episodes. The Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) with process analysis simulation showed that the peripheral subsidence chemical formation (CHEM) and vertical mixing (VMIX) effects are two major contributors to the enhancement of ozone levels to form the episode, while the advection (ADV) showed negative values. However, the day-to-day variation of the daytime ozone levels during the episode is not determined by the daily variation of daytime CHEM and VMIX but is dominated by the ADV terms. Therefore, the ozone and its precursors accumulation, including the enhancement during the night-time, contribute to the daytime ozone increase in the following day. A detail day-to-day process analysis showed that in additional to decrease of negative ADV values (e.g. the weakened advection outflow or dispersion) on the ground, the integrated effect of the daily variation of the accumulative CHEM and ADV above the ground throughout the planetary boundary layer (PBL) together determined the overall day-to-day daytime ozone variation on the ground through the VMIX process. The results indicate that the peripheral characteristics of approaching typhoon not only form the ozone episode by the enhanced photochemical reactions, but also could increase the day-to-day daytime ozone levels via pollution accumulation throughout the PBL due to the WWD up to 3-5 km. These results illustrate the important role of the WWD in the lower troposphere for the formation of sustained ozone episodes due to the peripheral circulation of the typhoon, which helps to better predict the daily changes of daytime ozone levels.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000774564300001
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/273236
作者单位	Southern University of Science & Technology; Southern University of Science & Technology; Chuzhou University; China Meteorological Administration; Chengdu University of Information Technology
推荐引用方式 GB/T 7714	Li, Ying,Zhao, Xiangjun,Deng, Xuejiao,et al. The impact of peripheral circulation characteristics of typhoon on sustained ozone episodes over the Pearl River Delta region, China[J],2022,22(6):13.
APA	Li, Ying,Zhao, Xiangjun,Deng, Xuejiao,&Gao, Jinhui.(2022).The impact of peripheral circulation characteristics of typhoon on sustained ozone episodes over the Pearl River Delta region, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(6),13.
MLA	Li, Ying,et al."The impact of peripheral circulation characteristics of typhoon on sustained ozone episodes over the Pearl River Delta region, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.6(2022):13.