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Suivi des glaciers alpins par combinaison d'informations hétérogènes : images SAR Haute Résolution et mesures terrain

Abstract : The works presented in this PhD thesis focuses on the use of new remote sensing data for "massif du Mont Blanc" glaciers’ monitoring: High Resolution (HR) synthetic aperture radar images of TerraSAR-X satellite and HR shooting of the automatic digital camera. This thesis will show the contribution of this heterogeneous information to the measurement of the surface displacement of alpine glacier. For this purpose, a review of displacement measurement methods specific to each of the two types of image is proposed. Then two approaches are explored: the mono-source displacement measurement in the geometry for each sensor and the multi-source displacement measurement via intra-sensor and inter-sensor combinations. While the mono-source approach provides only 2D displacement measurements, multi-source measurements allow, for the first time, the estimation of 3D surface displacement fields of the Mont Blanc glaciers. The measurements were performed on several image time series covering the period 2008-2009 for four Mont Blanc glaciers (Argentière, Mer de Glace/Leschaux, Bossons et Taconnaz). In the context of global warming, these surface displacement measurements provide interesting data in the glaciology domain in order to constrain flow and evolution digital models.
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Renaud Fallourd. Suivi des glaciers alpins par combinaison d'informations hétérogènes : images SAR Haute Résolution et mesures terrain. Autre. Université Grenoble Alpes, 2012. Français. ⟨NNT : 2012GRENA007⟩. ⟨tel-00718596⟩

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