Item: Laboratory Simulations of Radiation-Recrystallization Events in Southwest Montana
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Title: Laboratory Simulations of Radiation-Recrystallization Events in Southwest Montana
Proceedings: Proceedings Whistler 2008 International Snow Science Workshop September 21-27, 2008
Authors:
- Andrew E. Slaughter [ Department of Civil Engineering, Montana State University, Bozeman, MT ]
- Patrick J. Staron [ Department of Civil Engineering, Montana State University, Bozeman, MT ]
- Edward E. Adams [ Department of Civil Engineering, Montana State University, Bozeman, MT ]
- Doug McCabe [ Yellowstone Club Ski Patrol, Big Sky, MT ]
- Henry Munter [ Yellowstone Club Ski Patrol, Big Sky, MT ]
- Doug Catherine [ Yellowstone Club Ski Patrol, Big Sky, MT ]
- Irene Henninger [ Yellowstone Club Ski Patrol, Big Sky, MT ]
- Mike Cooperstein [ Yellowstone Club Ski Patrol, Big Sky, MT ]
- Tom Leonard [ Yellowstone Club Ski Patrol, Big Sky, MT ]
Date: 2008-09-23
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.
Language of Article: English
Presenters: Mr. Andrew Slaughter.
Keywords: near-surface facets, radiation recrystallization, heat-transfer model, snow micropen
Page Number(s): 139
Subjects: snowpack modeling microstructure variability
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