Comparaison des résultats d'un modèle de métamorphose de la neige avec le caractéristiques déduites des données de Landsat dans les Alpes.

M. Fily, B. Hernandez
Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS, Université Joseph Fourier, Grenoble, France

J.P. Dedieu, E. Paul
Laboratoire de la Montagne Alpine, CNRS, Université Joseph Fourier, France

Y. Durand, E. Brun
Centre d'Etude de la Neige, Météo-France, Grenoble, France

Abstract. Comparisons are made between the output of a snow metamorphism model and the snow cover characteristics that can be derived from Landsat Thematic Mapper image over the French Alps. The lower limit of the snow cover, the surface grain size and the surface temperature are compared for different ranges, elevations, slopes and azimuth. The lower limit of the snow cover and the snow grain size computed by the model or derived from satellite data are similar but large differences are found for the surface temperature.