气候变化领域集成服务门户(CCPortal): Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide - Part 2: Deposition nucleation and condensation freezing

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DOI	10.5194/acp-19-1059-2019
	Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide - Part 2: Deposition nucleation and condensation freezing
	Boose Y.; Baloh P.; Plötze M.; Ofner J.; Grothe H.; Sierau B.; Lohmann U.; Kanji Z.A.
发表日期	2019
ISSN	16807316
起始页码	1059
结束页码	1076
卷号	19 期号:2
英文摘要	Mineral dust particles from deserts are amongst the most common ice nucleating particles in the atmosphere. The mineralogy of desert dust differs depending on the source region and can further fractionate during the dust emission processes. Mineralogy to a large extent explains the ice nucleation behavior of desert aerosol, but not entirely. Apart from pure mineral dust, desert aerosol particles often exhibit a coating or are mixed with small amounts of biological material. Aging on the ground or during atmospheric transport can deactivate nucleation sites, thus strong ice nucleating minerals may not exhibit their full potential. In the partner paper of this work, it was shown that mineralogy determines most but not all of the ice nucleation behavior in the immersion mode found for desert dust. In this study, the influence of semi-volatile organic compounds and the presence of crystal water on the ice nucleation behavior of desert aerosol is investigated. This work focuses on the deposition and condensation ice nucleation modes at temperatures between 238 and 242K of 18 dust samples sourced from nine deserts worldwide. Chemical imaging of the particles' surface is used to determine the cause of the observed differences in ice nucleation. It is found that, while the ice nucleation ability of the majority of the dust samples is dominated by their quartz and feldspar content, in one carbonaceous sample it is mostly caused by organic matter, potentially cellulose and/or proteins. In contrast, the ice nucleation ability of an airborne Saharan sample is found to be diminished, likely by semi-volatile species covering ice nucleation active sites of the minerals. This study shows that in addition to mineralogy, other factors such as organics and crystal water content can alter the ice nucleation behavior of desert aerosol during atmospheric transport in various ways. © Author(s) 2019.All right reserved.
语种	英语
scopus关键词	aerosol; condensation; desert; dust; freezing; ice crystal; mineral; mineralogy; nucleation
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/144690
作者单位	Institute for Atmospheric and Climate Science, ETH Zürich, Zürich, Switzerland; Institute for Materials Chemistry, TU Wien, Vienna, Austria; Institute for Geotechnical Engineering, ETH Zürich, Zürich, Switzerland; Institute for Chemical Technologies and Analytics, TU Wien, Vienna, Austria; Institute of Atmospheric Physics, German Aerospace Center, Wessling, Germany
推荐引用方式 GB/T 7714	Boose Y.,Baloh P.,Plötze M.,et al. Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide - Part 2: Deposition nucleation and condensation freezing[J],2019,19(2).
APA	Boose Y..,Baloh P..,Plötze M..,Ofner J..,Grothe H..,...&Kanji Z.A..(2019).Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide - Part 2: Deposition nucleation and condensation freezing.Atmospheric Chemistry and Physics,19(2).
MLA	Boose Y.,et al."Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide - Part 2: Deposition nucleation and condensation freezing".Atmospheric Chemistry and Physics 19.2(2019).