Geography 2152F/G Lecture Notes - Lecture 11: Climatology, Chilkoot Trail, Blowing Snow
4 Dec 2018
School
Department
Course
Professor
Document Summary
It is estimated that over 99% of avalanches are not seen by anyone. It is likely that over 1 million avalanches large enough to kill a person occur annually in western canada alone. Snow climatology: snowfall accumulation depends on latitude, altitude, and proximity to bodies of water, temperature decreases with altitude therefore high mountains have permanent snow cover, snow accumulates on mountain slopes that are at angles of less than. 60o: this angle is from the base/ horizontal, if the angle is more than 60 then the snow will drop and not even stick. Snow cover: the probability of a white christmas takes into account average snow cover, they are updated daily. 2: the layers do not stick together so we get a failure, these avalanches move as a cohesive blocks leaving behind a scarp, they are the most dangerous avalanches.
