气候变化领域集成服务门户(CCPortal): Very high stratospheric influence observed in the free troposphere over the northern Alps

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DOI	10.5194/acp-20-243-2020
	Very high stratospheric influence observed in the free troposphere over the northern Alps - Just a local phenomenon?
	Trickl T.; Vogelmann H.; Ries L.; Sprenger M.
发表日期	2020
ISSN	16807316
起始页码	243
结束页码	266
卷号	20 期号:1
英文摘要	The atmospheric composition is strongly influenced by a change in atmospheric dynamics, which is potentially related to climate change. A prominent example is the doubling of the stratospheric ozone component at the Zugspitze summit station (2962 m a.s.l., Garmisch-Partenkirchen, Germany) between the mid-seventies and 2005, roughly from 11 to 23 ppb (43 %). Systematic efforts for identifying and quantifying this influence have been made since the late 1990s. Meanwhile, routine lidar measurements of ozone and water vapour carried out at Garmisch-Partenkirchen (German Alps) since 2007, combined with in situ and radiosonde data and trajectory calculations, have revealed that stratospheric intrusion layers are present on 84 % of the yearly measurement days. At Alpine summit stations the frequency of intrusions exhibits a seasonal cycle with a pronounced summer minimum that is reproduced by the lidar measurements. The summer minimum disappears if one looks at the free troposphere as a whole. The mid- and upper-tropospheric intrusion layers seem to be dominated by very long descent on up to hemispheric scale in an altitude range starting at about 4.5 km a.s.l. Without interfering air flows, these layers remain very dry, typically with RH ≤5 % at the centre of the intrusion. Pronounced ozone maxima observed above Garmisch-Partenkirchen have been mostly related to a stratospheric origin rather than to long-range transport from remote boundary layers. Our findings and results for other latitudes seem to support the idea of a rather high contribution of ozone import from the stratosphere to tropospheric ozone. © 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
关键词	atmospheric dynamics climate change lidar mesoscale meteorology ozone radiosonde satellite data satellite imagery stratosphere-troposphere interaction trajectory Alps
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/132316
推荐引用方式 GB/T 7714	Trickl T.,Vogelmann H.,Ries L.,et al. Very high stratospheric influence observed in the free troposphere over the northern Alps - Just a local phenomenon?[J]. Atmospheric Chemistry and Physics,2020,20(1).
APA	Trickl T.,Vogelmann H.,Ries L.,&Sprenger M..(2020).Very high stratospheric influence observed in the free troposphere over the northern Alps - Just a local phenomenon?.,20(1).
MLA	Trickl T.,et al."Very high stratospheric influence observed in the free troposphere over the northern Alps - Just a local phenomenon?".20.1(2020).