DOI: 10.5194/tc-11-2075-2017
Scopus记录号: 2-s2.0-85028848661
论文题名: Wind enhances differential air advection in surface snow at sub-meter scales
作者: Drake S ; A ; , Selker J ; S ; , Higgins C ; W
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期: 5 起始页码: 2075
结束页码: 2087
语种: 英语
英文关键词: advection
; array
; atmospheric plume
; atmospheric pressure
; boundary layer
; carbon monoxide
; ice core
; nitrogen
; pressure gradient
; sensor
; snow cover
; snowpack
; wind forcing
英文摘要: Atmospheric pressure gradients and pressure fluctuations drive within-snow air movement that enhances gas mobility through interstitial pore space. The magnitude of this enhancement in relation to snow microstructure properties cannot be well predicted with current methods. In a set of field experiments, we injected a dilute mixture of 1ĝ€% carbon monoxide (CO) and nitrogen gas (N2) of known volume into the topmost layer of a snowpack and, using a distributed array of thin film sensors, measured plume evolution as a function of wind forcing. We found enhanced dispersion in the streamwise direction and also along low-resistance pathways in the presence of wind. These results suggest that atmospheric constituents contained in snow can be anisotropically mixed depending on the wind environment and snow structure, having implications for surface snow reaction rates and interpretation of firn and ice cores. © 2017 Author(s). This work is distributed under the Creative Commons Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75508
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, United States; Biological and Ecological Engineering, Oregon State University, Corvallis, United States
Recommended Citation:
Drake S,A,, Selker J,et al. Wind enhances differential air advection in surface snow at sub-meter scales[J]. Cryosphere,2017-01-01,11(5)