气候变化领域集成服务门户(CCPortal): Cloud history can change water-ice-surface interactions of oxide mineral aerosols: A case study on silica

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DOI	10.5194/acp-20-1075-2020
	Cloud history can change water-ice-surface interactions of oxide mineral aerosols: A case study on silica
	Abdelmonem A.; Ratnayake S.; Toner J.D.; Lützenkirchen J.
发表日期	2020
ISSN	1680-7316
起始页码	1075
结束页码	1087
卷号	20 期号:2
英文摘要	Mineral aerosol particles nucleate ice, and many insights have been obtained on water freezing as a function of mineral surface properties such as charge or morphology. Previous studies have mainly focused on pristine samples despite the fact that aerosol particles age under natural atmospheric conditions. For example, an aerosol-containing cloud droplet can go through freeze-melt or evaporation-condensation cycles that change the surface structure, the ionic strength, and pH. Variations in the surface properties of ice-nucleating particles in the atmosphere have been largely overlooked. Here, we use an environmental cell in conjunction with nonlinear spectroscopy (second-harmonic generation) to study the effect of freeze-melt processes on the aqueous chemistry at silica surfaces at low pH. We found that successive freeze-melt cycles disrupt the dissolution equilibrium, substantially changing the surface properties and giving rise to marked variations in the interfacial water structure and the ice nucleation ability of the surface. The degree of order of water molecules, next to the surface, at any temperature during cooling decreases and then increases again with sample aging. Along the aging process, the water ordering-cooling dependence and ice nucleation ability improve continuously. © 2020 Author(s).
语种	英语
scopus关键词	aerosol; aging; atmospheric chemistry; cloud droplet; dissolution; ice crystal; oxide; silica
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/248022
作者单位	Institute of Meteorology and Climate Research - Atmospheric Aerosol Research (IMKAAF), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, 76344, Germany; Institute of Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, 76344, Germany; Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, United States
推荐引用方式 GB/T 7714	Abdelmonem A.,Ratnayake S.,Toner J.D.,et al. Cloud history can change water-ice-surface interactions of oxide mineral aerosols: A case study on silica[J],2020,20(2).
APA	Abdelmonem A.,Ratnayake S.,Toner J.D.,&Lützenkirchen J..(2020).Cloud history can change water-ice-surface interactions of oxide mineral aerosols: A case study on silica.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(2).
MLA	Abdelmonem A.,et al."Cloud history can change water-ice-surface interactions of oxide mineral aerosols: A case study on silica".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.2(2020).