DOI: 10.5194/tc-10-791-2016
Scopus记录号: 2-s2.0-84964786059
论文题名: Metamorphism during temperature gradient with undersaturated advective airflow in a snow sample
作者: Ebner P ; P ; , Schneebeli M ; , Steinfeld A
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 2 起始页码: 791
结束页码: 797
语种: 英语
英文关键词: advection
; airflow
; ice crystal
; mass transport
; metamorphism
; microstructure
; porosity
; recrystallization
; snow
; sublimation
; temperature gradient
; water vapor
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). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75158
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
There are no files associated with this item.
作者单位: Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland; WSL Institute for Snow and Avalanche Research SLF, Davos Dorf, Switzerland
Recommended Citation:
Ebner P,P,, Schneebeli M,et al. Metamorphism during temperature gradient with undersaturated advective airflow in a snow sample[J]. Cryosphere,2016-01-01,10(2)