气候变化领域集成服务门户(CCPortal): On the ice-nucleating potential of warm hydrometeors in mixed-phase clouds

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DOI	10.5194/acp-21-561-2021
	On the ice-nucleating potential of warm hydrometeors in mixed-phase clouds
	Krayer M.; Chouippe A.; Uhlmann M.; Dušek J.; Leisner T.
发表日期	2021
ISSN	1680-7316
起始页码	561
结束页码	575
卷号	21 期号:1
英文摘要	The question as to whether or not the presence of warm hydrometeors in clouds may play a significant role in the nucleation of new ice particles has been debated for several decades. While the early works of Fukuta and Lee (1986) and Baker (1991) indicated that it might be irrelevant, the more recent study of Prabhakaran et al. (2020) suggested otherwise. In this work, we attempt to quantify the ice-nucleating potential using high-fidelity flow simulation techniques around a single hydrometeor and use favorable considerations to upscale the effects to a collective of ice particles in clouds. While we find that ice nucleation may be significantly enhanced in the vicinity of a warm hydrometeor and that the affected volume of air is much larger than previously estimated, it is unlikely that this effect alone causes the rapid enhancement of ice nucleation observed in some types of clouds, mainly due to the low initial volumetric ice concentration. Furthermore, it is demonstrated that the excess nucleation rate does not primarily depend on the rate at which cloud volume is sampled by the meteors' wakes but is rather limited by the exposure time of ice-nucleating particles to the wake, which is estimated to be of the order of few microseconds. It is suggested to further investigate this phenomenon by tracking the trajectories of ice-nucleating particles in order to obtain a parametrization which can be implemented into existing cloud models to investigate second-order effects such as ice enhancement after the onset of glaciation. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	cloud microphysics; computer simulation; hydrometeorology; ice; nucleation; quantitative analysis; tracking; trajectory
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/247227
作者单位	Institute for Hydromechanics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany; ICube, Fluid Mechanics Group, Université de Strasbourg, Strasbourg, France; Institute of Meteorology and Climate Research, Atmospheric Aerosol Research Department, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany; ICube, Fluid Mechanics Group, Université de Strasbourg, Strasbourg, France
推荐引用方式 GB/T 7714	Krayer M.,Chouippe A.,Uhlmann M.,et al. On the ice-nucleating potential of warm hydrometeors in mixed-phase clouds[J],2021,21(1).
APA	Krayer M.,Chouippe A.,Uhlmann M.,Dušek J.,&Leisner T..(2021).On the ice-nucleating potential of warm hydrometeors in mixed-phase clouds.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(1).
MLA	Krayer M.,et al."On the ice-nucleating potential of warm hydrometeors in mixed-phase clouds".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.1(2021).