Review of surface friction, surface resistance, and flow of snow

Three related topics pertaining to surface properties of snow are reviewed: (1) surface friction between snow and other materials as applied to skis and sled runners, (2) surface resistance of snow to oversnow trafficability of vehicles, and (3) flow of snow over snow surfaces as occurs in avalanches. These topics were part of the presentations at the U.S.‐Canadian Workshop on the Properties of Snow held at Snowbird, Utah, April 1981. The review is an update of work in these areas since the dates of previous reviews and focuses, particularly, on the work reported by attendees of the workshop.