Results 21 to 30 of about 2,322 (261)

Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction

Journal of Glaciology, 2017
The instrumented sample holder Snowbreeder 5 is used to investigate the simultaneous influence of settlement on temperature-gradient snow metamorphism in time-lapse micro-computed tomography experiments.
MAREIKE WIESE, MARTIN SCHNEEBELI
doaj   +1 more source

Numerical study of fracture arrest on snow cover

Fracture and Structural Integrity, 2013
Under the hypothesis of a perfectly brittle phenomenon, avalanche triggering can be investigated numerically by means of Linear Elastic Fracture Mechanics (LEFM).
B. M. Chiaia, B. Frigo
doaj   +3 more sources

The effect of propagation saw test geometries on critical cut length [PDF]

Natural Hazards and Earth System Sciences
For a slab avalanche to release, a crack in a weak snow layer beneath a cohesive snow slab has to initiate and propagate. Information on crack propagation is essential for assessing avalanche triggering potential.
B. Bergfeld, K. W. Birkeland, V. Adam, V. Adam, P. L. Rosendahl, A. van Herwijnen   +5 more
doaj   +1 more source

Seismic observations of a complex firn structure across the Amery Ice Shelf, East Antarctica

Journal of Glaciology, 2021
We use seismic refraction data to investigate the firn structure across a suture zone on the Amery Ice Shelf, East Antarctica, and the possible role of glacier dynamics in firn evolution.
Hannes Hollmann, Adam Treverrow, Leo E. Peters, Anya M. Reading, Bernd Kulessa   +4 more
doaj   +1 more source

Early-stage interaction between settlement and temperature-gradient metamorphism

Journal of Glaciology, 2017
Snow metamorphism and settlement change the microstructure of a snowpack simultaneously. Past experiments investigated snow deformation under isothermal conditions. In nature, temperature gradient metamorphism and settlement often occur together.
MAREIKE WIESE, MARTIN SCHNEEBELI
doaj   +1 more source

Assessing the robustness and scalability of the accelerated pseudo-transient method [PDF]

Geoscientific Model Development, 2022
The development of highly efficient, robust and scalable numerical algorithms lags behind the rapid increase in massive parallelism of modern hardware.
L. Räss, L. Räss, I. Utkin, I. Utkin, I. Utkin, T. Duretz, T. Duretz, S. Omlin, Y. Y. Podladchikov, Y. Y. Podladchikov, Y. Y. Podladchikov   +10 more
doaj   +1 more source

Influence of slab depth spatial variability on skier-triggering probability and avalanche size

Annals of Glaciology
Spatial variability of snowpack properties adds uncertainty in the evaluation of avalanche hazard. We propose a combined mechanical–statistical approach to study how spatial variation of slab depth affects the skier-triggering probability and possible ...
Francis Meloche, Louis Guillet, Francis Gauthier, Alexandre Langlois, Johan Gaume   +4 more
doaj   +1 more source

Comparing measurements of snow mechanical properties relevant for slab avalanche release

Journal of Glaciology, 2019
Snow properties relevant to the fracture processes involved in dry-snow slab avalanche release include weak layer specific fracture energy, slab elastic modulus and density.
BENJAMIN REUTER, MARTIN PROKSCH, HENNING LÖWE, ALEC VAN HERWIJNEN, JÜRG SCHWEIZER   +4 more
doaj   +1 more source

Dynamic models for impact-initiated stress waves through snow columns

Journal of Glaciology
The objective of this research is to model snow's response to dynamic, impact loading. Two constitutive relationships are considered: elastic and Maxwell-viscoelastic.
Samuel Vincent Verplanck, Edward Eagan Adams   +1 more
doaj   +1 more source

The effect of slab touchdown on anticrack arrest in propagation saw tests [PDF]

Natural Hazards and Earth System Sciences
Understanding crack phenomena in the snowpack and their role in avalanche formation is imperative for hazard prediction and mitigation. Many studies have explored how structural properties of snow contribute to the initial instability of the snowpack ...
P. L. Rosendahl, J. Schneider, G. Bobillier, F. Rheinschmidt, B. Bergfeld, A. van Herwijnen, P. Weißgraeber   +6 more
doaj   +1 more source