International Snow Science Workshop Proceedings - Montana State University Library

Item: Numerical Experiments of Wind Transport Over a Mountainous Instrumented Site at Small, Medium and Large Scales

• • Title: Numerical Experiments of Wind Transport Over a Mountainous Instrumented Site at Small, Medium and Large Scales

    Proceedings: Proceedings of the 2000 International Snow Science Workshop, October 1-6, Big Sky, Montana

    Authors:

    • Florence Bouvet-Naaim  [ Cemagref, Snow Avalanche Engineering and Torrent Control Research Unit, Grenoble, France, Meteo-France CEN (Snow Study Center), Grenoble, France ]
    • Yves Durand  [ Cemagref, Snow Avalanche Engineering and Torrent Control Research Unit, Grenoble, France, Meteo-France CEN (Snow Study Center), Grenoble, France ]
    • Mohamed Naaim  [ Cemagref, Snow Avalanche Engineering and Torrent Control Research Unit, Grenoble, France, Meteo-France CEN (Snow Study Center), Grenoble, France ]
    • Gilbert Guyomarc'h  [ Cemagref, Snow Avalanche Engineering and Torrent Control Research Unit, Grenoble, France, Meteo-France CEN (Snow Study Center), Grenoble, France ]
    • Jean-Luc Michaux  [ Cemagref, Snow Avalanche Engineering and Torrent Control Research Unit, Grenoble, France, Meteo-France CEN (Snow Study Center), Grenoble, France ]
    • Laurent Merindol  [ Cemagref, Snow Avalanche Engineering and Torrent Control Research Unit, Grenoble, France, Meteo-France CEN (Snow Study Center), Grenoble, France ]

    Date: 2000

    Abstract: For about ten winter seasons, the CEN and the CEMAGREF, two French laboratories involved in snow research, have performed intensive field measurement campaigns concerning various snow and weather parameters during blowing snow events. The observation sites are located near the Alpe d'Huez ski resort at elevations between 2700 and 2800 m (Col du Lac Blanc). In order to determine the avalanche release hazard, it is necessary to take into account the spatial distribution of snow transported by wind in avalanche starting zone. So we have to determine the effector the wind on the snow cover at the avalanche path scale. Therefore the numerical simulation of such phenomena, in the framework of the operational avalanche hazard forecast, also began some years ago. All numerical experiments, presented here, benefit from all these archived data and aim at representing the local wind and their effects on the distribution of snow. The main difference is their working scale which can vary from the current operational massif scale (- 2030 km) to finer definitions varying between 1 mand 100 m. The originality of this project consists in the coupling of this different numerical simulations, using outputs from models at large scale as inputs for models at small scale. First results will be presented.

    Object ID: issw-2000-302-308.pdf

    Language of Article: English

    Presenter(s): Unknown

    Keywords: drifting snow, wind, experimental site, measurement, numerical model

    Page Number(s): 302-308

    Subjects: wind transport scales mountainous instrumented site

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