L'évolution morphologique récente du réseau hydrographique sur les marges des glaciers Lovén, presqu'île de Brøgger (Spitsberg, 79°N)

• Main Author: Roussel, Erwan
• Other Authors: Laboratoire de Géographie Physique et Environnementale (GEOLAB), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Université Clermont Auvergne (UCA)-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Maison des Sciences de l'Homme de Clermont-Ferrand (MSH Clermont), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: French
• Published: HAL CCSD 2005
• Subjects: Spitsberg; réseau hydrographique; contexte paraglaciaire; Spitsbergen; hydrographic network; paraglacial context; [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology; Kongsfjord; Ryder; Kongsfjord*
• Online Access: https://hal.archives-ouvertes.fr/hal-00449560

National audience The post Little Ice Age warming generates in polar environments paraglacial processes (Church and Ryder, 1972) marked by the prevalence of run-off over the zonal processes (glacial and periglacial). Indeed, in Spitsbergen, the retreat recorded by the Brøgger peninsula's glaciers induces the release of large amounts of proglacial liquid water reaching the Kongsfjord. This results into the development on the proglacial margins of a complexe and very mobile hydrographic network. However, we could demonstrate that this mobility decreases with the time. The hydrographic network adopts an increasingly stable organization marked by the reduction of the number of channels and a growing hierarchisation in spite of its extreme youth.