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Videos - Snow & avalanche science
The videos posted to this channel since ~2015 are by Bruce Jamieson and colleagues. Some of the earlier videos on this channel are links to videos made by Bruce Jamieson and ASARC colleagues (snowavalanchearchive.com/asarc). The links to all these videos can be shared freely and the videos used for any purpose, including commercially, provided the content and authorship are not altered.
To locate a specific video, go to your browser and enter: vimeo jamieson video keywords
Snow and avalanche science
An inside look at how people trigger slab avalanches
This video outlines - for a wide audience - the current understanding of how rider-triggered and natural avalanches start. Bruce Jamieson, Karl Birkeland and Ron Simenhois, January 2023. CC BY-ND. Key sources: Schweizer, J., B. Reuter, A. van Herwijnen, J. Gaume. 2016. Avalanche release 101, Proceedings of the 2016 International Snow Science Workshop in Breckenridge, CO, USA. Gaume, J., van Herwijnen, A., Gast, T., Teran, J., Jiang, C. 2019. Investigating the release and flow of snow avalanches at the slope-scale using a unified model based on the material point method. Cold Region Science and Technology 168. Trottet, B., Simenhois, R., Bobillier, G.; Bergfeld, B., van Herwijnen, A., Jiang, C., Gaume, J. 2022. Transition from sub-Rayleigh anticrack to supershear crack propagation in snow avalanches. Nature Physics 18.
Is slab tension a condition that makes rider-triggered avalanches more likely?
Slab tension means different things to different avalanche practitioners (survey summer 2022). In this (controversial?) 21 minute video, Bruce Jamieson, Karl Birkeland, Grant Statham and Scott Thumlert summarize some common perceptions about slab tension, then review the role of slab tension in the modern understanding of dry slab avalanche release.
Triggering a persistent slab avalanche from a thin spot
Triggering a persistent slab avalanche from a thin spot is infrequent, insidious and potentially deadly. This 6 minute video outlines the snowpack conditions and mechanics. Intended for intermediate and advanced backcountry recreationists and those interested in avalanche science. Feb 2022. CC BY-ND
An intro to snow avalanche dynamics and impact
An introduction to snow avalanche dynamics and impact. Includes avalanches in motion but no models and almost no math. Intended for anyone interested in avalanche science, early career avalanche practitioners, and Christian Jaedicke's students (perhaps as pre-course material?) Bruce Jamieson and Christian Jaedicke. October 2021.
It's convex. Should I avoid it?
Views on the roles of convexities in human triggered avalanches vary widely. In this educational video intended for intermediate and advanced winter backcountry recreationists, Ron Simenhois and Bruce Jamieson present various perspectives and research on human triggering near convex slopes. CC BY-ND.
Why does snow cool when melted with salt, and what does that have to do with avalanches?
When salt is added to snow, the snow cools because heat from the snow flows into concentrated salt water around the salt grains. The surprisingly large amount of heat required for melting (i.e. latent heat) contributes to avalanche formation in at least two ways.
Crack propagation in human-triggered slab avalanches and snowpack tests
For a skier, snowmobiler or other load to trigger a slab avalanche: the dynamic load must start a crack in a weak layer and then crack propagation must be sustained away from the load. There is no one paper that summarizes the ideas in this video, but you could start by searching for "simenhois fracture propagation" and read the short 2009 article. Thanks to Alec van Herwijnen, Cam Campbell and the Asarc crew for the video clips and photos.