Item: Preliminary Results of Snow Surface Friction Coefficient Measurements
Title: Preliminary Results of Snow Surface Friction Coefficient Measurements
Proceedings: 2002 International Snow Science Workshop, Penticton, British Columbia
- J. Andrew Gleason [ Colorado Avalanche Information Center, Silverton, Colorado ] [ University of Wyoming, Cold Regions Analysis Group ]
Abstract: A measure of the strength of bonding of new snow to surface layers would be useful for avalanche workers. A new instrument to measure snow surface friction was created using a weighted piece of rough plastic mounted on a 10 cm by 10 em piece of plywood. The device was dragged over the snow surface with a force gauge to measure the force it took to overcome bonding between the device and the snow surface. Different snow types at various temperatures were investigated in the San Juan Mountains of Colorado, USA. A coefficient of dry static friction was calculated for each snow type. Coefficients ranged from 0.53 - 1.76. Some of these coefficients were compared to shear strength numbers derived from shear frame measurements on the previous surface layer 24 hours after new snow fell on the surface.
Language of Article: English
Keywords: coefficient, snow surface, shear strength, temperature
Digital Abstract Not Available