气候变化领域集成服务门户(CCPortal): Aerosol-cloud interactions: The representation of heterogeneous ice activation in cloud models

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DOI	10.5194/acp-21-15213-2021
	Aerosol-cloud interactions: The representation of heterogeneous ice activation in cloud models
	Kärcher B.; Marcolli C.
发表日期	2021
ISSN	1680-7316
起始页码	15213
结束页码	15220
卷号	21 期号:19
英文摘要	The homogeneous nucleation of ice in supercooled liquid-water clouds is characterized by time-dependent freezing rates. By contrast, water phase transitions induced heterogeneously by ice-nucleating particles (INPs) are described by time-independent ice-active fractions depending on ice supersaturation (s). Laboratory studies report ice-active particle number fractions (AFs) that are cumulative in s. Cloud models budget INP and ice crystal numbers to conserve total particle number during water phase transitions. Here, we show that ice formation from INPs with time-independent nucleation behavior is overpredicted when models budget particle numbers and at the same time derive ice crystal numbers from s-cumulative AFs. This causes a bias towards heterogeneous ice formation in situations where INPs compete with homogeneous droplet freezing during cloud formation. We resolve this issue by introducing differential AFs, thereby moving us one step closer to more robust simulations of aerosol-cloud interactions. © Copyright:
语种	英语
scopus关键词	aerosol; cloud classification; cloud condensation nucleus; heterogeneity; ice crystal; laboratory method
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/246508
作者单位	Institute of Atmospheric Physics, DLR Oberpfaffenhofen, Weßling, Germany; Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
推荐引用方式 GB/T 7714	Kärcher B.,Marcolli C.. Aerosol-cloud interactions: The representation of heterogeneous ice activation in cloud models[J],2021,21(19).
APA	Kärcher B.,&Marcolli C..(2021).Aerosol-cloud interactions: The representation of heterogeneous ice activation in cloud models.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(19).
MLA	Kärcher B.,et al."Aerosol-cloud interactions: The representation of heterogeneous ice activation in cloud models".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.19(2021).