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Suivi de la température de surface du sol en zones de pergélisol Arctique par l'utilisation de données de télédétection satellite assimilées dans le schéma de surface du modèle climatique canadien (CLASS)

Abstract : Recent studies showed that global warming in arctic areas, as twice as important in northern high latitudes than in the rest of the world, growed the thickness of the surface active layer in permafrost areas (superficial layer of the soil that thaws during summer period). This surface modification could have a major environmental impact on soil carbon release, hydrology, ecosystems, and permafrost. It already starts to have socio-economical impacts on north community infrastructures. The project's goal is to use a new microwave satellite database that has just been developed for the analysis of surface temperatures and changes in permafrost in Canada, Alaska over the past 30 years. One of the specific goals of the project is to develop a method to characterize changes in the surface active layer in permafrost areas by the assimilation of space observations in a heat flow model in the soil. The evolution of the extension of permafrost areas derived will be analyzed according to the coverage of soil and the dynamics of snow cover, two parameters also derived by satellite. Possibility of model validation by ground measurements with a microwaves radiometers. This project combines theoretical development, modeling and image processing on different scientific fields (physics of remote sensing measurement, Geophysics of the Environment, ecosystems, soil science).
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https://tel.archives-ouvertes.fr/tel-01684250
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Submitted on : Monday, January 15, 2018 - 12:22:35 PM
Last modification on : Friday, September 25, 2020 - 11:00:08 AM
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  • HAL Id : tel-01684250, version 1

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Nicolas Marchand. Suivi de la température de surface du sol en zones de pergélisol Arctique par l'utilisation de données de télédétection satellite assimilées dans le schéma de surface du modèle climatique canadien (CLASS). Climatologie. Université de Sherbrooke (Québec, Canada), 2017. Français. ⟨NNT : 2017GREAU018⟩. ⟨tel-01684250⟩

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