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Accueil > Équipes > Equipe MEIGE : Modélisation, Expériences et Instrumentation pour la Géophysique et l’Environnement > Diffusion scientifique > Séminaires internes

Fine-scale modeling of the boudray layer wind field over complex topography

Charles Amory, 12/07/2012

This study dThis study describes the adaptation of wind fields to steep and complex alpine terrain using
fine-scale numerical modeling and grid nesting technique. This work is motivated by the need
of high-resolution flow fields to predict snow transport and snow cover development for
avalanche warning purposes. Applying the meteorological prediction model Méso-NH
(developed by Météo-France and the Laboratoire d’Aérologie of Toulouse) over the complex
topography of a benchmark site in terms of studying snow transport by wind (Col du Lac
Blanc, French Alps), the boundary layer flow was simulated and evaluated against
measurements. The high-resolution grid with horizontal spacing of 4 m and vertical spacing
of 1 m near the surface indicates that the model is able to reproduce small-scale flow
features such as speed-up, blocking and separation.
escribes the adaptation of wind fields to steep and complex alpine terrain using
fine-scale numerical modeling and grid nesting technique. This work is motivated by the need
of high-resolution flow fields to predict snow transport and snow cover development for
avalanche warning purposes. Applying the meteorological prediction model Méso-NH
(developed by Météo-France and the Laboratoire d’Aérologie of Toulouse) over the complex
topography of a benchmark site in terms of studying snow transport by wind (Col du Lac
Blanc, French Alps), the boundary layer flow was simulated and evaluated against
measurements. The high-resolution grid with horizontal spacing of 4 m and vertical spacing
of 1 m near the surface indicates that the model is able to reproduce small-scale flow
features such as speed-up, blocking and separation.