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X-Ray Tomography-Based Microstructure Representation in the Snow Microwave Radiative Transfer Model [PDF]

IEEE Transactions on Geoscience and Remote Sensing, 2022
The modular Snow Microwave Radiative Transfer (SMRT) model simulates microwave scattering behaviour in snow via different selectable theories and snow microstructure representations, which is well suited to intercomparisons analyses.
Anna Kontu, Nicolas Floury, Henning Lowe   +2 more
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Feature extraction on digital snow microstructures

ACM SIGGRAPH 2015 Posters, 2015
During a snowfall, the snow crystals accumulate on the ground and gradually form a complex porous medium constituted of air, water vapour, ice and sometimes liquid water. This ground-lying snow transforms with time, depending on the physical parameters of the environment. The main purpose of the digitalSnow project is to provide efficient computational
Levallois, Jérémy, Coeurjolly, David, Lachaud, Jacques-Olivier   +2 more
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Microstructure and sound absorption of snow

Cold Regions Science and Technology, 2012
Abstract Sound absorption of snow was measured for test specimens with porosities in the range from 46% to approximately 90% in an impedance tube at frequencies between 125 Hz and 1.6 kHz. In addition, the geometrical structure of the same samples was determined by X-ray microtomography.
Maysenhölder, W., Heggli, M., Zhou, X., Zhang, T., Frei, E., Schneebeli, M.   +5 more
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Influence of Microstructure on the Consolidation of Compressed Snow

Journal of Cold Regions Engineering, 2015
AbstractSnow falling on roads is rapidly compacted into a hard crust which is difficult to remove, and which may become slippery at temperatures near melting. To avoid this, chemicals are often spread in a measure called anticompaction to keep the snow plowable until it can be removed by highway maintenance personnel.
Johan Wåhlin, Alex Klein-Paste
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Multiscale tomography of the seasonal evolution of the snow microstructure

2022
<div> <div> <div> <p>Due to very active metamorphism, snow on the ground exhibits a wide range of microstructural patterns. Indeed, snow is a very porous material and it exists on Earth close to its melting point, which promotes its structural evolution through vapor transport and melting ...
Pascal Hagenmuller, Neige Calonne, Marie Dumont, Julien Brondex, Francois Tuzet, Jacques Roulle   +5 more
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Microstructural resistance of snow following first wetting

Cold Regions Science and Technology, 2011
Abstract One of the main causes for the formation of wet snow avalanches is the decrease in strength following the introduction of liquid water. The influence of liquid water on initially dry snow was investigated in twelve field experiments in the Eastern Swiss Alps.
Techel, F., Pielmeier, C., Schneebeli, M.   +2 more
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Exploring the influence of snow microstructure on dual-frequency radar measurements

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
Recent advancements to the understanding of snow-microwave interaction have helped to identify the considerable potential for radar-based retrieval of terrestrial snow mass. If applied to space-borne platforms, such retrievals could provide much needed improvements to the spatial and temporal availability of snow mass estimates.
Joshua King, Chris Derksen, Peter Toose
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A unified framework for computational microstructure-based snow mechanics

2021
<p>The effective mechanical behavior of snow can be deduced from microstructural homogenization through numerical simulations. Although such numerical upscaling of elasticity and strength of snow microstructures is standard (using FEM), numerical schemes to study generic features of the transition from small to large strain situations ...
Lars Blatny, Henning Löwe, Stephanie Wang, Johan Gaume   +3 more
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Microstructural analytical techniques for snow compacted by an aircraft tire

Tribology International, 2007
Abstract Assessing the frictional condition of snow-contaminated runways is difficult and requires an understanding of the tribological processes during the tire–snow–pavement interaction. Hence, analytical techniques to study the snow after the interaction are desired.
Alex Klein-Paste, Nirmal K. Sinha, Sveinung Løset, Armann Norheim   +3 more
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On mechanics and microstructure of weak snow layers

Trockene Schneebrettlawinen entstehen, wenn eine Schwachschicht in der Schneedecke versagt. Diese lokale Schädigung kann sich in Form eines Risses über einen ganzen Hang ausbreiten und die Verbindung des darüberliegenden Schneebretts zur Unterlage trennen.
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