Item: Laboratory simulations of radiation-recrystallization events in southwest montana
Title: Laboratory simulations of radiation-recrystallization events in southwest montana
Proceedings: Proceedings Whistler 2008 International Snow Science Workshop September 21-27, 2008
Authors: Mr. Andrew Slaughter, Patrick Staron, Edward Adams, Doug McCabe, Henry Munter, Doug Catherine, Irene Henninger, Mike Cooperstein, Tom Leonard.
Abstract: During the winter seasons of 2006/2007 and 2007/2008, Montana State University researchers collaborated with the Yellowstone Club Ski Patrol to investigate near-surface metamorphism. Detailed weather information as well as daily observations and grain-scale images were collected. Several radiationrecrystallization events were observed throughout this period. Near-surface facets were successfully developed using laboratory simulations of recorded field data. The observed facets formed in a manner consistent with observations made in the field. A Comparison of measured data with a thermal model indicated that low-density snow may be conducive, but is not obligatory, to form near-surface facets. Using samples from laboratory experiments, time-lapse movies of facet growth were captured using a microscope equipped with a cryo-stage capable of inducing a temperature gradient. Preliminary data indicates the penetration resistance of the surface layer, measured using a Snow MicroPen, varied as the near-surface facets developed. This ongoing collaborative effort improved and will continue to improve the understanding of the processes surrounding near-surface faceting.
Presenters: Mr. Andrew Slaughter.
Keywords: near-surface facets, radiation recrystallization, heat-transfer model, snow micropen