气候变化领域集成服务门户(CCPortal): Wind enhances differential air advection in surface snow at sub-meter scales

CCPortal

DOI	10.5194/tc-11-2075-2017
	Wind enhances differential air advection in surface snow at sub-meter scales
	Drake S.A.; Selker J.S.; Higgins C.W.
发表日期	2017
ISSN	19940416
卷号	11 期号:5
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.
学科领域	advection; array; atmospheric plume; atmospheric pressure; boundary layer; carbon monoxide; ice core; nitrogen; pressure gradient; sensor; snow cover; snowpack; wind forcing
语种	英语
scopus关键词	advection; array; atmospheric plume; atmospheric pressure; boundary layer; carbon monoxide; ice core; nitrogen; pressure gradient; sensor; snow cover; snowpack; wind forcing
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/119339
作者单位	College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, 97333, United States; Biological and Ecological Engineering, Oregon State University, Corvallis, 97333, United States
推荐引用方式 GB/T 7714	Drake S.A.,Selker J.S.,Higgins C.W.. Wind enhances differential air advection in surface snow at sub-meter scales[J],2017,11(5).
APA	Drake S.A.,Selker J.S.,&Higgins C.W..(2017).Wind enhances differential air advection in surface snow at sub-meter scales.Cryosphere,11(5).
MLA	Drake S.A.,et al."Wind enhances differential air advection in surface snow at sub-meter scales".Cryosphere 11.5(2017).