气候变化领域集成服务门户(CCPortal): Metamorphism during temperature gradient with undersaturated advective airflow in a snow sample

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DOI	10.5194/tc-10-791-2016
	Metamorphism during temperature gradient with undersaturated advective airflow in a snow sample
	Ebner P.P.; Schneebeli M.; Steinfeld A.
发表日期	2016
ISSN	19940416
卷号	10 期号:2
英文摘要	Snow at or close to the surface commonly undergoes temperature gradient metamorphism under advective flow, which alters its microstructure and physical properties. Time-lapse X-ray microtomography is applied to investigate the structural dynamics of temperature gradient snow metamorphism exposed to an advective airflow in controlled laboratory conditions. Cold saturated air at the inlet was blown into the snow samples and warmed up while flowing across the sample with a temperature gradient of around 50 K m-1. Changes of the porous ice structure were observed at mid-height of the snow sample. Sublimation occurred due to the slight undersaturation of the incoming air into the warmer ice matrix. Diffusion of water vapor opposite to the direction of the temperature gradient counteracted the mass transport of advection. Therefore, the total net ice change was negligible leading to a constant porosity profile. However, the strong recrystallization of water molecules in snow may impact its isotopic or chemical content. © 2016 Author(s).
学科领域	advection; airflow; ice crystal; mass transport; metamorphism; microstructure; porosity; recrystallization; snow; sublimation; temperature gradient; water vapor
语种	英语
scopus关键词	advection; airflow; ice crystal; mass transport; metamorphism; microstructure; porosity; recrystallization; snow; sublimation; temperature gradient; water vapor
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119662
作者单位	Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland; WSL Institute for Snow and Avalanche Research SLF, Davos Dorf, 7260, Switzerland
推荐引用方式 GB/T 7714	Ebner P.P.,Schneebeli M.,Steinfeld A.. Metamorphism during temperature gradient with undersaturated advective airflow in a snow sample[J],2016,10(2).
APA	Ebner P.P.,Schneebeli M.,&Steinfeld A..(2016).Metamorphism during temperature gradient with undersaturated advective airflow in a snow sample.Cryosphere,10(2).
MLA	Ebner P.P.,et al."Metamorphism during temperature gradient with undersaturated advective airflow in a snow sample".Cryosphere 10.2(2016).