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Thermal Conductivity of Anisotropic Snow Measured by Three Independent Methods : Volume 6, Issue 3 (25/05/2012)

By Riche, F.

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Book Id: WPLBN0004022672
Format Type: PDF Article :
File Size: Pages 31
Reproduction Date: 2015

Title: Thermal Conductivity of Anisotropic Snow Measured by Three Independent Methods : Volume 6, Issue 3 (25/05/2012)  
Author: Riche, F.
Volume: Vol. 6, Issue 3
Language: English
Subject: Science, Cryosphere, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Riche, F., & Schneebeli, M. (2012). Thermal Conductivity of Anisotropic Snow Measured by Three Independent Methods : Volume 6, Issue 3 (25/05/2012). Retrieved from

Description: WSL Institute for Snow and Avalanche Research SLF, Davos Dorf, Switzerland. The thermal conductivity of snow determines the temperature gradient, and by this the rate of snow metamorphism. It is therefore a key property of snow. However, parameterizations of thermal conductivity measured with the transient needle probe and the steady-state heat-flux plate show a bias. In addition, it is not clear to which degree thermal anisotropy is relevant. Until now, no physically convincing argument for the existence of this bias could be found. In this study, we investigated three independent methods to measure snow thermal conductivity and its anisotropy: a needle probe with a long heating time, a guarded heat flux plate, and direct numerical simulation at the level of the pore and ice structure. The three methods were applied to identical snow samples, apart from the different measurement volumes of each methods. We analyzed the consistency and the difference between these methods. We found a distinct change from horizontal thermal anisotropy in small rounded grains and vertical anisotropy in depth hoar. The anisotropy between vertical and horizontal conductivity ranges between 0.5–2. This anisotropy can cause a difference of up to −25 % to + 25 % if the thermal conductivity is calculated only from a horizontally inserted needle probe. Based on these measurements, the direct numerical simulation is the most reliable method as the tensorial components of the thermal conductivity can be calculated, the corresponding microstructure is precisely known and the homogeneity of the sample can be determined.

Thermal conductivity of anisotropic snow measured by three independent methods

Abels, G.: Beobachtungen der täglichen Periode der Temperatur im Schnee und Bestimmung des Wärmeleitungsvermögens des Schnees als Function seiner Dichtigkeit, Kaiserl. Akad. Wissensch., Rep. Meteorologie, 16, 1–53, 1892.; Abu-Hamdeh, N. and Reeder, R.: Soil thermal conductivity: effects of density, moisture, salt concentration, and organic matter, Soil Sci. Soc. Am. J., 64, 1285–1290, 2000.; Ams, C. H., Knackstedt, M. A., Pinczewski, W. V., and Lindquist, W. B.: Accurate estimation of transport properties form microtomographic images, Geophys. Res. Lett., 28, 3361–3364, 2001.; Arakawa, H., Izumi, K., Kawashima, K., and Kawamura, T.: Study on quantitative classification of seasonal snow using specific surface area and intrinsic permeability, Cold Reg. Sci. Technol., 59, 163–168, doi:10.1016/j.coldregions.2009.07.004, 2009.; Armstrong, R. L. and Brun, E.: Snow and Climate, Physical Porcesses, Surface Energy Exchange and Modeling, Chapt. 4.4, Cambridge University Press, New York, USA, 2008.; Arons, E. M. and Colbeck, S. C.: Geometry of heat and mass transfer in dry snow: a review of theory and experiment, Rev. Geophys., 33, 463–493, doi:10.1029/95RG02073, 1995.; ASTM: Test method for steady-state heat flux measurements and thermal transmission properties by means of the guarded-hot-plate apparatus, in: Annual Book of ASTM Standards, vol. C 177, ASTM International, West Conshohocken, PA, USA, doi:10.1520/C0177-10, 2008.; Blackwell, J. H.: A transient-flow method for determination of thermal constants of insulating materials in bulk. 1. Theory, J. Appl. Phys., 25, 137–144, 1954.; Boumaza, T. and Redgrove, J.: Use of the transient plane source technique for rapid multiple thermal property measurements, Int. J. Thermophys., 24, 501–512, 2003.; Brandt, R. E. and Warren, S. G.: Temperature measurements and heat transfer in near-surface snow at the South Pole, J. Glaciol., 43, 339–351, 1997.; Brigaud, F. and Vasseur, G.: Mineralogy, porosity and fluid control on thermal-conductivity of sedimentary-rocks, Geophys. J. Int., 98, 525–542, 1989.; Calonne, N., Flin, F., Morin, S., Lesaffre, B., du Roscoat, S. R., and Geindreau, C.: Numerical and experimental investigations of the effective thermal conductivity of snow, Geophys. Res. Lett., 38, L23501, doi:10.1029/2011GL049234, 2011.; Carslaw, H. S. and Jaeger, J. C.: Conduction of Heat in Solids, 2 Edn., Clarendon Press, New York, USA, 1959.; Cogne, C.: Experimental data and modelling of thermal properties of ice creams, J. Food Eng., 58, 331–341, doi:10.1016/S0260-8774(02)00396-5, 2003.; De Vries, D.: A nonstationary method for determining thermal conductivity of soil in situ, Soil Sci., 73, 83–89, 1952.; Cook, B. I., Bonan, G. B., Levis, S., and Epstein, H. E.: The thermoinsulation effect of snow cover within a climate model, Clim. Dynam., 31, 107–124, doi:10.1007/s00382-007-0341-y, 2007.; Etchevers, P., Martin, E., Brown, R., Fierz, C., Lejeune, Y., Bazile, E., Boone, A., Dai, Y.-J., Essery,&am


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