Two-dimensional numerical modelling of surface wind velocity and associated snowdrift effects over complex mountainous topography
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
Publication date: 2004-01-01
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