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Two-dimensional numerical modelling of surface wind velocity and associated snowdrift effects over complex mountainous topography

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Abstract:

A new experimental software for blowing snow, SYTRON2, is presented. It takes advantage of the previous limited realization SYTRON1 and of the entire real-time operational environment of the automatic chain SAFRAN–Crocus–MÉPRA(SCM). It runs presently on a rectangular grid, with a mesh size of about 45 m, covering an area of 3.0 × 3.0 km2 around the observation test site Col du Lac Blanc, French Alps (2700 m a.s.l., near the Alpe d'Huez ski resort). SYTRON2 is initialized with a realistic snowpack representation derived from the SCM outputs and coupled to a wind field com- puted by the new SAMVER model. The final aim is to build a fully embedded tool, suitable for representing snowdrift effects with a better resolution at different specific locations. The different tools and operators used are described, as well as the field valida- tion processes which are based on remote identification of the eroded and accumulated areas using digital pictures.

Document Type: Research Article

DOI: https://doi.org/10.3189/172756404781814771

Publication date: 2004-01-01

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  • The Annals of Glaciology is a peer-reviewed, thematic journal published 2 to 4 times a year by the International Glaciological Society (IGS). Publication frequency is determined and volume/issue numbers assigned by the IGS Council on a year-to-year basis and with a lead time of 3 to 4 years. The Annals of Glaciology is included in the ISI Science Citation Index from volume 50, number 50 onwards.

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