Item: THE AVALANCHE TERRAIN EXPOSURE SCALE V.2
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Title: THE AVALANCHE TERRAIN EXPOSURE SCALE V.2
Proceedings: International Snow Science Workshop Proceedings 2023, Bend, Oregon
Authors:
- Grant Statham [ Parks Canada Agency, Banff, AB, Canada ] [ Simon Fraser University, Burnaby, BC, Canada ]
- Cam Campbell [ Alpine Solutions Avalanche Services, Vancouver, BC, Canada ]
Date: 2023-10-08
Abstract: The Avalanche Terrain Exposure Scale (ATES) is an avalanche terrain classification system used to assess and communicate the degree of avalanche terrain exposure for backcountry travel applications. Commonly known as terrain ratings, these classifications are determined by an analysis of individual terrain parameters, which are then systematically combined to produce a single rating. The ATES uses technical specifications for terrain assessment and corresponding communication models to reach the target audience. ATES ratings are found in guidebooks and route descriptions or displayed spatially on maps. The system has been in use for 20 years as a risk management tool in conventional avalanche safety practices for public recreation and workplace avalanche safety. This paper introduces ATES v.2, an update to the system that expands the original scale from three levels to five by including Class 0 – Non-Avalanche Terrain, and Class 4 – Extreme Terrain. The original ATES v.1/04 and the ATES Zoning model have been merged into a single, five-level ATES v.2. ATES ratings can be applied as areas, zones, corridors, or routes and then communicated using models for backcountry travel and waterfall ice climbing.
Object ID: ISSW2023_O8.01.pdf
Language of Article: English
Presenter(s): Grant Statham
Keywords: snow, terrain, avalanche, exposure, risk, GIS
Page Number(s): 597 - 605
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