Videos for avalanche practitioners
The videos posted to this channel since ~2015 are by Bruce Jamieson (snowline.ca) and colleagues. Some of the earlier videos on this channel are links to videos made by Bruce Jamieson and ASARC colleagues (UCalgary.ca/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.
Videos for avalanche practitioners
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.
Iain Stewart-Patterson on intuition and making decisions for recreation in avalanche terrain
A video chat with Iain Stewart-Patterson, May 2021, about intuitive and analytical thinking, trip planning, decision aids and mindsets for recreation in avalanche terrain. CC BY-ND. The podcast is at https://www.podbean.com/media/share/pb-8mmz8-107ca68
Common snowpack tests
A brief how-to for common snowpack tests to locate and assess instabilities within the snowpack, presented by Mike Conlan. Start times of tests in this video are as follows: 1:32 Compression Test 5:06 Deep Tap Test 7:28 Extended Column Test 10:54 Rutschblock Test 14:48 Propagation Saw Test 18:48 Shovel Shear Test 20:49 Hand Shear Test 22:11 Concluding remarks on initiation, propagation, and limitations. Fracture character video: http://vimeo.com/30996756
Near crust faceting and slab avalanching
A technical video for avalanche practitioners and recreationists interested in avalanche science. The video outlines the formation of faceted layers near melt-freeze crusts, the persistence of these layers as potential failure layers for slab avalanches and some ideas on anticipating the resulting slab avalanches. Bruce Jamieson and Scott Savage, May 2020.
A more visual method for rating avalanche size on the D-scale
A video to start discussion about whether visualization will help us rate avalanche size on the D-scale. By Bruce Jamieson, Montse Bacardit, Ethan Greene and Ian Tomm. May 2020. Catalan and Spanish subtitles by Montse Bacardit. German subtitles by Thomas Exner. CC BY-ND.
From 3 to 30. How many levels should a rating have?
Having found little published guidance on the optimal number of levels in a rating system, Bruce Jamieson and colleagues use examples, mostly from avalanche and weather forecasting, to identify a basic guideline and several other considerations. 03:40 Matthew MacDonald on AQHI ratings 09:52 Matthew MacDonald on precipitation likelihood ratings 12:11 Pascal Haegeli on the avalanche danger rating 18:53 Jesse Percival on rating skier compaction 21:25 James Floyer on avalanche size ratings in public bulletins
Fracture character in compression tests
This presentation video for advanced recreationists and practitioners identifies the five types of fracture character and shows the frequency of skier triggering on slopes that exhibited each type of fracture character in compression tests. Sound improved in January 2018.
Communicating avalanche likelihood and probability
Starting with the likelihood definition and terms in the Conceptual Model of Avalanche Hazard (Statham et al., 2018), Scott Thumlert, Grant Statham and Bruce Jamieson present some ideas for improving avalanche likelihood and how it can be communicated. Presented at the Virtual Snow Science Workshop, October 2020. CC BY-ND.