气候变化领域集成服务门户(CCPortal): Unveiling atmospheric transport and mixing mechanisms of ice-nucleating particles over the Alps

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DOI	10.5194/acp-22-3111-2022
	Unveiling atmospheric transport and mixing mechanisms of ice-nucleating particles over the Alps
	Wieder, Jorg; Mignani, Claudia; Schar, Mario; Roth, Lucie; Sprenger, Michael; Henneberger, Jan; Lohmann, Ulrike; Brunner, Cyril; Kanji, Zamin A.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	3111
结束页码	3130
卷号	22 期号:5 页码:20
英文摘要	Precipitation over the mid-latitudes originates mostly from the ice phase within mixed-phase clouds, signifying the importance of initial ice crystal formation. Primary ice crystals are formed on ice-nucleating particles (INPs), which measurements suggest are sparsely populated in the troposphere. INPs are emitted by a large number of ground-based sources into the atmosphere, from where they can be lifted up to cloud heights. Therefore, it is vital to understand vertical INP transport mechanisms, which are particularly complex over orographic terrain. We investigate the vertical transport and mixing mechanisms of INPs over orographic terrain during cloudy conditions by simultaneous measurements of in situ INP concentration at a high valley and a mountaintop site in the Swiss Alps in late winter 2019. On the mountaintop, the INP concentrations were, on average, lower than in the high valley. However, a diurnal cycle in INP concentrations was observed at the mountaintop, which was absent in the high valley. The median mountaintop INP concentration equilibrated to the concentration found in the high valley towards the night. We found that, in nearly 70 % of the observed cases, INP-rich air masses were orographically lifted from low elevation upstream of the measurement site. In addition, we present evidence that, over the course of the day, air masses containing high INP concentrations were advected from the Swiss plateau towards the measurement sites, contributing to the diurnal cycle of INPs. Our results suggest a local INP concentration enhancement over the Alps during cloud events.
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:000768208500001
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/273436
作者单位	Swiss Federal Institutes of Technology Domain; ETH Zurich; University of Basel
推荐引用方式 GB/T 7714	Wieder, Jorg,Mignani, Claudia,Schar, Mario,et al. Unveiling atmospheric transport and mixing mechanisms of ice-nucleating particles over the Alps[J],2022,22(5):20.
APA	Wieder, Jorg.,Mignani, Claudia.,Schar, Mario.,Roth, Lucie.,Sprenger, Michael.,...&Kanji, Zamin A..(2022).Unveiling atmospheric transport and mixing mechanisms of ice-nucleating particles over the Alps.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(5),20.
MLA	Wieder, Jorg,et al."Unveiling atmospheric transport and mixing mechanisms of ice-nucleating particles over the Alps".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.5(2022):20.