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Your search for Subject weak layersresulted in 67 records.

Title: A New Crack Propagation Criterion for Skier-Triggered Snow Slab Avalanches
Date: 2016-10-02
Authors: Johan Gaume, Benjamin Reuter, Alec van Herwijnen, Jürg Schweizer
Description: Dry-snow slab avalanches begin with a local failure in a weak snowpack layer buried below cohesive slab layers. If the size of the failed zone exceeds...
Object ID: ISSW16_P1.01.pdf
Keywords: snow avalanche, skier-triggering, failure initiation, crack propagation, pst, slab, weak layer
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Title: Assessing Weak Layer Failure and Changes in Snowpack Properties Due to Avalanche Control By Explosives
Date: 2013-10-07
Authors: Stephan Simioni, Jurg Schweizer
Description: Avalanche control by explosives is among the key temporary preventive measures and today fixed avalanche control installations are widely used. Hither...
Object ID: ISSW13_paper_O1-13.pdf
Keywords: snow properties, avalanche control, explosives, weak layer failure
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Title: Weak-Layer Spatial Variability as a Possible Trigger of Slab Tensile Failure
Date: 2013-10-07
Authors: Johan Gaume, Guillaume Chambon, Nicolas Eckert, Mohamed Naaim
Description: The evaluation of the location of slab tensile failure represents an important concern for the evaluation of the extent of avalanche release zones and...
Object ID: ISSW13_paper_O2-03.pdf
Keywords: snow avalanche, avalanche release, slab, weak layer, spatial variability, tensile failure
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Title: The Systematic Snow Cover Diagnosis: A Process-Based Approach for Avalanche Danger Assessment
Date: 2013-10-07
Authors: Georg Kronthaler, Christoph Mitterer, Bernd Zenke, Michael Lehning
Description: Recreationists and local avalanche warning services face often the problem of assessing the avalanche danger for a single slope or avalanche path. How...
Object ID: ISSW13_paper_O4-11.pdf
Keywords: slope stability, snow cover test, weak layer
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Title: Comparison of Structural Instability Indices (Lemons), ECT and RB Results
Date: 2013-10-07
Authors: Chiambretti Igor, Fabiano Monti, Mauro Valt
Description: Almost all avalanche forecasting services have a network of traditional stations where an array of daily or weekly snowpack measurement or observation...
Object ID: ISSW13_paper_O5-03.pdf
Keywords: rb, ect, structural instability indices
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Title: Weather Preceding Persistent Deep Slab Avalanches
Date: 2013-10-07
Authors: Michael Conlan, Bruce Jamieson
Description: Deep slab avalanches release on persistent weak layers of facets, surface hoar, depth hoar, or poorly bonded crusts and are generally hard to forecast...
Object ID: ISSW13_paper_P1-01.pdf
Keywords: deep slab avalanche, persistent weak layer, weather, natural, localized dynamic load
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Title: Modeling a Fluid/Solid Transition in Snow Weak Layers Application to Snow Avalanche Release
Date: 2013-10-07
Authors: François Louchet, Alain Duclos, Stephane Caffo
Description: A transition between solid and a fluid-like phases was evidenced and studied in the material made of loose ice crystals involved in snow avalanche re...
Object ID: ISSW13_paper_P1-11.pdf
Keywords: slab, triggering, weak layer, collapse, shear, whumpf
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Title: A Relative Difference Approach to Detect Potential Weak Layers Within a Snow Profile
Date: 2013-10-07
Authors: Fabiano Monti, Jürg Schweizer
Description: Reducing the subjectivity of stability evaluation derived from snow profiles and increasing the spatial and temporal resolution of snow stratigraphy i...
Object ID: ISSW13_paper_P1-30.pdf
Keywords: snow stratigraphy, snow profile, snow stability evaluation
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Title: Experiences from a Heavy Avalanche Season 2013, Caused by a Weak Snow Layer, and Leading to Several Road Closures in Northern Norway
Date: 2013-10-07
Authors: Silje S. Haaland, Jeanette Kvalvaagnes, Ole-André Helgaas
Description: During the last week of March and first days of April 2013 a significant large number of avalanches hit roads and cut off all infrastructures to sever...
Object ID: ISSW13_paper_P1-58.pdf
Keywords: snowpack, avalanche, weak layers, norway
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Title: Testing a New Shear Loading Apparatus for In-Situ Studies of Weak Snow Layers
Date: 2013-10-07
Authors: Evgeny A. Podolskiy, Monica Barbero, Fabrizio Barpi, Mauro Borri-Brunetto, Oronzo Pallara, Barbara Frigo, Bernardino Chiaia, Guillaume Chambon, Mohamed Naaim
Description: Here we show preliminary results of shear tests carried out with a new shear test apparatus designed and constructed by Politecnico di Torino, DISEG (...
Object ID: ISSW13_paper_P2-27.pdf
Keywords: snow, mechanics, instrument, weak layer, avalanche
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Title: Measurements of ECT Scores and Crack-Face Friction in Non-Persistent Weak Layers: What are the Implications for Practitioners?
Date: 2012
Authors: Ron Simenhois, Karl W. Birkeland, Alec van Herwijnen
Description: Field observations suggest that avalanches releasing on non-persistent weak layers tend to slide on steeper slopes than other dry slab avalanches. Rec...
Object ID: issw-2012-104-110.pdf
Keywords: weak snowpack layers, extended column test, slopes, dry slab avalanche,
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Title: Storm Snow Avalanches: Characteristics and Forecasting
Date: 2012
Authors: Edward H. Bair, Ron Simenhois, Alec van Herwijnen, Karl Birkeland, Jeff Dozier
Description: At ski areas, a majority of avalanches fail in storm snow. We investigate these avalanches using stability tests and avalanche observations from Calif...
Object ID: issw-2012-111-114.pdf
Keywords: storm snow, ski area, extended column test
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Title: A Mechanism for Cooling-Related Slab Avalanche Release
Date: 2012
Authors: James A. Floye
Description: Strong anecdotal evidence exists suggesting cooling is an important factor for slab avalanche release. Despite this, a viable mechanism for it has no...
Object ID: issw-2012-252-255.pdf
Keywords: slab release, strain rate, weak layer, near-surface temperature change
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Title: Properties of Weak Layers Composed of Precipitation Particles In and Near Avalanche Starting Zones in Japan
Date: 2012
Authors: Shinji Ikeda, Tomoyuki Noro
Description: To gain further insight into the properties of weak layers composed of precipitation particles(PP weak layer), we analyzed 18 measurement datasets. A...
Object ID: issw-2012-586-590.pdf
Keywords: weak layer, fracture lines, snow crystals, avalanche forecast
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Title: Mechanics of Weak Layer Snow Under Cyclic Loading Studied By FEM
Date: 2012
Authors: Evgeny A. Podolskiy, Guillaume Chambon
Description: The mechanical behavior of snow weak layers is a crucial element in dry snow slab avalanche forecasting. Here, we use Finite Element Method (FEM) mod...
Object ID: issw-2012-617-621.pdf
Keywords: dry slab avalanche, elasticity, weak layer
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