气候变化领域集成服务门户(CCPortal): Black Carbon Particles Do Not Matter for Immersion Mode Ice Nucleation

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DOI	10.1029/2019GL086764
	Black Carbon Particles Do Not Matter for Immersion Mode Ice Nucleation
	Kanji Z.A.; Welti A.; Corbin J.C.; Mensah A.A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	The role of black carbon (BC) in ice crystal formation via immersion freezing relevant for mixed-phase cloud formation is uncertain. Previous studies report either negligible or significant contributions of BC particles to cloud glaciation via immersion freezing. Despite conflicting evidence, immersion freezing by BC particles is included in several cloud models. Here we show that fossil fuel soot and commercially available hydrocarbon BC is inactive as immersion freezing nuclei for atmospherically relevant particle sizes and surface areas. Instead, temperatures <235 K are necessary for freezing droplets with immersed soot particles, implying homogeneous freezing, rather than immersion freezing by soot. A comparison of the results to previous studies using larger soot aggregates and dust reveals the ineffectiveness of soot as immersion ice nucleating particles. We conclude that soot particles with properties like those investigated here can be neglected for simulating ice nucleation in mixed-phase clouds. © 2020 The Authors.
英文关键词	Carbon; Crystallization; Dust; Fossil fuels; Freezing; Glacial geology; Nucleation; Soot; Cloud glaciation; Conflicting evidence; Ice nucleation; Immersion freezing; Mixed-phase cloud; Soot aggregates; Soot particles; Surface area; Ice; black carbon; freezing; glaciation; hydrocarbon; ice crystal; nucleation; numerical model; soot; uncertainty analysis
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170300
作者单位	Institute for Atmospheric and Climate Science, ETH, Zurich, Zurich, Switzerland; Atmospheric Composition Unit, Finnish Meteorological Institute, Helsinki, Finland; Metrology Research Centre, National Research Council Canada, Ottawa, Canada; City of Zurich, Environment and Health Safety, Air Quality Research Division, Zurich, Switzerland
推荐引用方式 GB/T 7714	Kanji Z.A.,Welti A.,Corbin J.C.,et al. Black Carbon Particles Do Not Matter for Immersion Mode Ice Nucleation[J],2020,47(11).
APA	Kanji Z.A.,Welti A.,Corbin J.C.,&Mensah A.A..(2020).Black Carbon Particles Do Not Matter for Immersion Mode Ice Nucleation.Geophysical Research Letters,47(11).
MLA	Kanji Z.A.,et al."Black Carbon Particles Do Not Matter for Immersion Mode Ice Nucleation".Geophysical Research Letters 47.11(2020).