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DOI	10.5194/acp-20-3945-2020
	The influence of typhoons on atmospheric composition deduced from IAGOS measurements over Taipei
	Roux F.; Clark H.; Wang K.-Y.; Rohs S.; Sauvage B.; Nédélec P.
发表日期	2020
ISSN	16807316
起始页码	3945
结束页码	3963
卷号	20 期号:6
英文摘要	The research infrastructure IAGOS (In-Service Aircraft for a Global Observing System) equips commercial aircraft with instruments to monitor the composition of the atmosphere during flights around the world. In this article, we use data from two China Airlines aircraft based in Taipei (Taiwan) which provided daily measurements of ozone, carbon monoxide and water vapour throughout the summer of 2016. We present time series, from the surface to the upper troposphere, of ozone, carbon monoxide and relative humidity near Taipei, focusing on periods influenced by the passage of typhoons. We examine landing and take-off profiles in the vicinity of tropical cyclones using ERA-5 reanalyses to elucidate the origin of the anomalies in the vertical distribution of these chemical species. Results indicate a high ozone content in the upper- to middle-troposphere track of the storms. The high ozone mixing ratios are generally correlated with potential vorticity and anti-correlated with relative humidity, suggesting stratospheric origin. These results suggest that tropical cyclones participate in transporting air from the stratosphere to troposphere and that such transport could be a regular feature of typhoons. After the typhoons passed Taiwan, the tropospheric column was filled with substantially lower ozone mixing ratios due to the rapid uplift of marine boundary layer air. At the same time, the relative humidity increased, and carbon monoxide mixing ratios fell. Locally, therefore, the passage of typhoons has a positive effect on air quality at the surface, cleansing the atmosphere and reducing the mixing ratios of pollutants such as CO and O3. © 2020 EDP Sciences. All rights reserved.
关键词	atmospheric chemistry carbon monoxide chemical composition mixing ratio monitoring ozone potential vorticity relative humidity stratosphere-troposphere interaction time series typhoon water vapor Taipei Taiwan
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132121
推荐引用方式 GB/T 7714	Roux F.,Clark H.,Wang K.-Y.,et al. The influence of typhoons on atmospheric composition deduced from IAGOS measurements over Taipei[J]. Atmospheric Chemistry and Physics,2020,20(6).
APA	Roux F.,Clark H.,Wang K.-Y.,Rohs S.,Sauvage B.,&Nédélec P..(2020).The influence of typhoons on atmospheric composition deduced from IAGOS measurements over Taipei.,20(6).
MLA	Roux F.,et al."The influence of typhoons on atmospheric composition deduced from IAGOS measurements over Taipei".20.6(2020).