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Comportement d'un pergélisol expérimental soumis à un réchauffement

Abstract : The goal of this work was providing experimental data to better constrain the impact of global warming on permafrost. Methodology was based on physical modeling in a cold room. This allows identifying and defining the evolution processes of the experimental permafrost. Experimental permafrost was built-up based on available field data. The lithology of the material used was a mixture of fine sand and loam from the plain of Caen. Ice content is between 30 and 80%. Models are not scaled and dimensional problems are not considered. Indeed, these experiments are a preliminary work. This study on the behaviour of an experimental warming permafrost allows a better understanding of (i) the changes in topography (thaw-settlement), (ii) the changes in the active layer, (iii) the thermal evolution of an experimental permafrost (freezing and thawing fronts monitoring) and (iv) the influence of different parameters (temperature, lithology, water-content, ice-content and icelayer). This work has contributed to the development of new experimental techniques and it will enhance physical modeling databases on permafrost.
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https://tel.archives-ouvertes.fr/tel-00919225
Contributor : Valérie Casado-Malaizé Connect in order to contact the contributor
Submitted on : Monday, December 16, 2013 - 2:38:22 PM
Last modification on : Tuesday, October 19, 2021 - 11:33:55 PM
Long-term archiving on: : Tuesday, March 18, 2014 - 4:45:49 PM

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  • HAL Id : tel-00919225, version 1

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B. Hurault. Comportement d'un pergélisol expérimental soumis à un réchauffement. Interfaces continentales, environnement. Université de Caen, 2011. Français. ⟨NNT : ⟩. ⟨tel-00919225⟩

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