期刊
COLD REGIONS SCIENCE AND TECHNOLOGY
卷 64, 期 2, 页码 73-80出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.coldregions.2010.02.008
关键词
Thermal conductivity; Snow; Heated-needle probe
We report on a 3-month long time series of in-situ measurements of the effective thermal conductivity (keg) of snow at 6 heights in an Alpine snowpack in the Mont-Blanc mountain range, France, at an altitude of 2400 m. Measurements were carried out automatically every 2 days using heated-needle probes embedded in the snowpack. The experimental procedure used is presented in detail and demonstrates the applicability of single heated-needle probes for the evaluation of keg in snow, both for long-term measurements within the snowpack and occasional use in the field. Results based on 139 automatically collected data show k(eff) values ranging between 0.04 and 0.35 Wm(-1) K-1. and a consistent pattern of effective thermal conductivity increase throughout the measurements campaign. The temporal rate of change of keff varies up to 0.01 W m(-1) K-1 day(-1), with maximum values just after snowfall. (C) 2010 Elsevier B.V. All rights reserved.
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