Is a glacier gone when it looks gone? Subsurface characteristics of high-Arctic ice-cored slopes as evidence of the latest maximum glacier extent
International audience In the context of glacier retreat and increased precipitations, Arctic glacier basin slopes are subject to stress leading to visible transformations. In this work, subsurface features of a small Arctic glacier basin slopes are mapped using ground-penetrating RADAR. In combinat...
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ftunivbourgogne:oai:HAL:hal-04606361v1 2024-09-09T19:21:35+00:00 Is a glacier gone when it looks gone? Subsurface characteristics of high-Arctic ice-cored slopes as evidence of the latest maximum glacier extent Bernard, Eric Friedt, Jean-Michel Prokop, Alexander Tolle, Florian Griselin, Madeleine Théoriser et modéliser pour aménager (UMR 6049) (ThéMA) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST) Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) 2024-06-08 https://hal.science/hal-04606361 en eng HAL CCSD Wiley hal-04606361 https://hal.science/hal-04606361 ISSN: 0197-9337 EISSN: 1096-9837 Earth Surface Processes and Landforms https://hal.science/hal-04606361 Earth Surface Processes and Landforms, 2024 [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2024 ftunivbourgogne 2024-07-08T23:45:11Z International audience In the context of glacier retreat and increased precipitations, Arctic glacier basin slopes are subject to stress leading to visible transformations. In this work, subsurface features of a small Arctic glacier basin slopes are mapped using ground-penetrating RADAR. In combination with surface topography data, eight transects were surveyed ranging from the areas furthest from the current glacier extent to the areas still in contact with the glacier. This allowed for a reconstitution of the successive stages ice-cored slopes go through when glaciers retreat. It appears that slopes evolve from thick debris-covered ice bodies connected with the glacier, to residual ice and ice/debris mixes covered in debris. At the same time, surface morphology of the slopes shifts from homogeneous ice-cored slope gradients to more complex talus-type slopes at the end of the process. The stages of these evolutions are in compliance with former glacier extents. The main driving factors of the slopes successive stages are the constant slope adjustments linked to debris movements, and the melting of ice cores. All these factors are exacerbated by the warmer and wetter conditions they are subject to. Article in Journal/Newspaper Arctic Université de Bourgogne (UB): HAL Arctic |
institution |
Open Polar |
collection |
Université de Bourgogne (UB): HAL |
op_collection_id |
ftunivbourgogne |
language |
English |
topic |
[SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDE.MCG]Environmental Sciences/Global Changes Bernard, Eric Friedt, Jean-Michel Prokop, Alexander Tolle, Florian Griselin, Madeleine Is a glacier gone when it looks gone? Subsurface characteristics of high-Arctic ice-cored slopes as evidence of the latest maximum glacier extent |
topic_facet |
[SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience In the context of glacier retreat and increased precipitations, Arctic glacier basin slopes are subject to stress leading to visible transformations. In this work, subsurface features of a small Arctic glacier basin slopes are mapped using ground-penetrating RADAR. In combination with surface topography data, eight transects were surveyed ranging from the areas furthest from the current glacier extent to the areas still in contact with the glacier. This allowed for a reconstitution of the successive stages ice-cored slopes go through when glaciers retreat. It appears that slopes evolve from thick debris-covered ice bodies connected with the glacier, to residual ice and ice/debris mixes covered in debris. At the same time, surface morphology of the slopes shifts from homogeneous ice-cored slope gradients to more complex talus-type slopes at the end of the process. The stages of these evolutions are in compliance with former glacier extents. The main driving factors of the slopes successive stages are the constant slope adjustments linked to debris movements, and the melting of ice cores. All these factors are exacerbated by the warmer and wetter conditions they are subject to. |
author2 |
Théoriser et modéliser pour aménager (UMR 6049) (ThéMA) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST) Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) |
format |
Article in Journal/Newspaper |
author |
Bernard, Eric Friedt, Jean-Michel Prokop, Alexander Tolle, Florian Griselin, Madeleine |
author_facet |
Bernard, Eric Friedt, Jean-Michel Prokop, Alexander Tolle, Florian Griselin, Madeleine |
author_sort |
Bernard, Eric |
title |
Is a glacier gone when it looks gone? Subsurface characteristics of high-Arctic ice-cored slopes as evidence of the latest maximum glacier extent |
title_short |
Is a glacier gone when it looks gone? Subsurface characteristics of high-Arctic ice-cored slopes as evidence of the latest maximum glacier extent |
title_full |
Is a glacier gone when it looks gone? Subsurface characteristics of high-Arctic ice-cored slopes as evidence of the latest maximum glacier extent |
title_fullStr |
Is a glacier gone when it looks gone? Subsurface characteristics of high-Arctic ice-cored slopes as evidence of the latest maximum glacier extent |
title_full_unstemmed |
Is a glacier gone when it looks gone? Subsurface characteristics of high-Arctic ice-cored slopes as evidence of the latest maximum glacier extent |
title_sort |
is a glacier gone when it looks gone? subsurface characteristics of high-arctic ice-cored slopes as evidence of the latest maximum glacier extent |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04606361 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 0197-9337 EISSN: 1096-9837 Earth Surface Processes and Landforms https://hal.science/hal-04606361 Earth Surface Processes and Landforms, 2024 |
op_relation |
hal-04606361 https://hal.science/hal-04606361 |
_version_ |
1809761811738656768 |