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Un modèle numérique original pour la simulation du manteau neigeux

Abstract : The thesis describes the different steps which lead during the 1980's to the development of an original numerical snow model. This model aimed at simulating the evolution of a seasonal snow cover as a function of the prevailing meteorological conditions. A first part describes the methods and algorithms used to compute the energy and mass exchange at the snow/atmosphere interface and inside the snowpack. The second part describes the experimental study which made possible the quantification of the metamorphism rate of snow samples submitted to weak temperature gradient and to liquid water content, in order to complete pre-existing knowledge on metamorphism. A third part describes the implementation of a set of metamorphism laws into the preliminary version of the snow model, which lead to the availability of the first numerical model able to simulate seasonal snowpack layering. The evaluation of the model at Col de Porte is presented. The last part introduces three applications of this model: real time monitoring of snowpack characteristics in the French Alps, assessment of the impact of climate change on snow climatology and simulation of the snowpack in a distributed hydrological model
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Submitted on : Thursday, December 1, 2011 - 6:23:34 PM
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Eric Brun. Un modèle numérique original pour la simulation du manteau neigeux. Sciences de la Terre. Université Paris-Est, 2011. Français. ⟨NNT : 2011PEST1070⟩. ⟨pastel-00647341⟩

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