Item: Wind and Snow Particle Distribution in Powder Snow Cloud
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Title: Wind and Snow Particle Distribution in Powder Snow Cloud
Proceedings: International Snow Science Workshop Grenoble – Chamonix Mont-Blanc - October 07-11, 2013
Authors:
- Yoichi Ito [ Nagoya University, Nagoya, Japan ]
- Kouichi Nishimura [ Nagoya University, Nagoya, Japan ]
- Florence Naaim-Bouvet [ UR ETNA, IRSTEA, Saint-Martin d’Hères, France ]
- Hervé Bellot [ UR ETNA, IRSTEA, Saint-Martin d’Hères, France ]
- Xavier Ravanat [ UR ETNA, IRSTEA, Saint-Martin d’Hères, France ]
Date: 2013-10-07
Abstract: An ultrasonic anemometer and a snow particle counter were newly installed in the avalanche test site locating at the Col du Lautaret pass, France. Simultaneous measurements of both wind and snow particles in the powder snow cloud were made to investigate the powder part of the avalanche in 2013 winter. The particle speed and diameter were calculated from the high-frequency recording of direct SPC output. The particle speed showed lower values than the wind speed. Relatively large particles were observed around the avalanche front and the size of the particles was slightly decreased in the following flow. The particle size distribution was well estimated by the aerodynamic theory except around the avalanche front.
Object ID: ISSW13_paper_O1-20.pdf
Language of Article: English
Presenter(s): Unknown
Keywords: avalanche, powder snow cloud, wind speed, particle size
Page Number(s): 587-590
Subjects: powder avalanche wind velocities avalanche experiment
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