Changement climatique et atrophie des masses glaciaires : quelles mutations pour les paysages islandais ?

• Published in: EchoGéo
• Main Authors: Chenet, Marie, Roussel, Erwan
• Other Authors: Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Géographie Physique et Environnementale (GEOLAB), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), 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: English
• Published: HAL CCSD 2008
• Subjects: Iceland; changement climatique; dynamiques de versant; hydrosystèmes proglaciaires; lichénométrie; Islande; climatic change; slope dynamics; proglacial hydrosystems; lichenometry; [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology; glacier
• Online Access: https://hal.science/hal-00449477; https://doi.org/10.4000/echogeo.1883

The Global Warming which occurs since the end of the Little Ice Age in Iceland leads to the retreat of the glacier fronts. This retreat has induced new dynamics in the glacier foreland, especially related to glacial meltwater and post-glacial release. Lichenometrics measures on moraines ridges and paleosandurs provide us the opportunity to reconstruct the evolution of the proglacial areas of the Morsárjökull and the Skaftafelljökull (Southeast Iceland) since the end of the Little Ice Age. Important processes of rockslides and rockfalls occur on slopes, whereas proglacial rivers undergo phenomena of incision and abandon of minor channels.