Results 191 to 200 of about 934,243 (233)

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
openaire   +2 more sources

Quasi in-situ snow and sea ice interface microstructure measured by micro-computed tomography

, 2021
The sea ice / snow interface in the high Arctic can no longer be thought of as simply black and white, but more complex than previously estimated. Our understanding of this interface is crucial for remote sensing, snow, brine and ice mass distribution ...
Amy R. Macfarlane, R. Dadić, S. Hämmerle, D. Wagner, M. Schneebeli   +4 more
semanticscholar   +1 more source

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.
W. Maysenhölder, M. Heggli, X. Zhou, T. Zhang, E. Frei, M. Schneebeli   +5 more
openaire   +1 more source

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.
F. Techel, C. Pielmeier, M. Schneebeli
openaire   +1 more source

Impact of intercepted and sub-canopy snow microstructure on snowpack response to rain-on-snow events under a boreal canopy

The Cryosphere
. Rain-on-snow events can cause severe flooding in snow-dominated regions. These are expected to become more frequent in the future as climate change shifts the precipitation from snowfall to rainfall.
B. Bouchard, Daniel F. Nadeau, Florent Dominé, N. Wever, A. Michel, M. Lehning, P. Isabelle   +6 more
semanticscholar   +1 more source

Microstructure-based modeling of snow using the material point method and finite strain elastoplasticity

, 2020
The mechanical response of snow depends on its microstructural geometry. Parameters such as porosity and orientation (degree of anisotropy) are examples of microstructural parameters that can affect snow mechanical properties.
L. Blatny, H. Löwe, Stephanie Wang, Chenfanfu Jiang, J. Gaume   +4 more
semanticscholar   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Modeling the changes in microstructure of snow during metamorphism

Cold Regions Science and Technology, 2001
Since the internal microstructure is important for determining the mechanical, thermal and physical properties of snow, a study was undertaken to develop a physical model that can predict changes in microstructure of snow during metamorphism. The microstructure was defined in terms of the 3-D coordination number, mean grain size, mean bond radius and ...
R.L Brown, P.K Satyawali, Michael Lehning, Perry Bartelt   +3 more
openaire   +1 more source

Snow Microstructure over Antarctic Landfast Ice

Landfast ice plays a significant role in climate and ecosystems in Antarctic coastal regions. From October to December 2022, we investigated the physical properties of snow and sea ice on Antarctic landfast ice in McMurdo Sound, following the protocols from the MSOAiC expedition. Our measurements confirmed some findings from MOSAiC (e.g.
Ruzica Dadic, Julia Martin, Roberta Pirazzini, Brian Anderson, Martin Schneebeli, Matthias Jaggi, Amy Macfarlane, Michael Lehning, Nander Wever, Petra Heil   +9 more
openaire   +1 more source