Internal structure and current evolution of very small debris-covered glacier systems located in alpine permafrost environments
This contribution explores the internal structure of very small debris-covered glacier systems located in permafrost environments and their current dynamical responses to short-term climatic variations. Three systems were investigated with electrical resistivity tomography and dGPS monitoring over a...
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2016
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ftdoajarticles:oai:doaj.org/article:ab68fbfe8c5b4234abded6e639ccd8cb 2023-05-15T16:36:49+02:00 Internal structure and current evolution of very small debris-covered glacier systems located in alpine permafrost environments Jean-Baptiste eBosson Christophe eLambiel 2016-04-01T00:00:00Z https://doi.org/10.3389/feart.2016.00039 https://doaj.org/article/ab68fbfe8c5b4234abded6e639ccd8cb EN eng Frontiers Media S.A. http://journal.frontiersin.org/Journal/10.3389/feart.2016.00039/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2016.00039 https://doaj.org/article/ab68fbfe8c5b4234abded6e639ccd8cb Frontiers in Earth Science, Vol 4 (2016) electrical resistivity tomography Permafrost DGPS Ground ice Debris-covered glaciers Rock glaciers Science Q article 2016 ftdoajarticles https://doi.org/10.3389/feart.2016.00039 2022-12-31T15:02:46Z This contribution explores the internal structure of very small debris-covered glacier systems located in permafrost environments and their current dynamical responses to short-term climatic variations. Three systems were investigated with electrical resistivity tomography and dGPS monitoring over a 3-year period. Five distinct sectors are highlighted in each system: firn and bare-ice glacier, debris-covered glacier, heavily debris-covered glacier of low activity, rock glacier and ice-free debris. Decimetric to metric movements, related to ice ablation, internal deformation and basal sliding affect the glacial zones, which are mainly active in summer. Conversely, surface lowering is close to zero (-0.04 m yr-1) in the rock glaciers. Here, a constant and slow internal deformation was observed (c. 0.2 m yr-1). Thus, these systems are affected by both direct and high magnitude responses and delayed and attenuated responses to climatic variations. This differential evolution appears mainly controlled by (1) the proportion of ice, debris and the presence of water in the ground, and (2) the thickness of the superficial debris layer. Article in Journal/Newspaper Ice permafrost Directory of Open Access Journals: DOAJ Articles Frontiers in Earth Science 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
electrical resistivity tomography Permafrost DGPS Ground ice Debris-covered glaciers Rock glaciers Science Q |
spellingShingle |
electrical resistivity tomography Permafrost DGPS Ground ice Debris-covered glaciers Rock glaciers Science Q Jean-Baptiste eBosson Christophe eLambiel Internal structure and current evolution of very small debris-covered glacier systems located in alpine permafrost environments |
topic_facet |
electrical resistivity tomography Permafrost DGPS Ground ice Debris-covered glaciers Rock glaciers Science Q |
description |
This contribution explores the internal structure of very small debris-covered glacier systems located in permafrost environments and their current dynamical responses to short-term climatic variations. Three systems were investigated with electrical resistivity tomography and dGPS monitoring over a 3-year period. Five distinct sectors are highlighted in each system: firn and bare-ice glacier, debris-covered glacier, heavily debris-covered glacier of low activity, rock glacier and ice-free debris. Decimetric to metric movements, related to ice ablation, internal deformation and basal sliding affect the glacial zones, which are mainly active in summer. Conversely, surface lowering is close to zero (-0.04 m yr-1) in the rock glaciers. Here, a constant and slow internal deformation was observed (c. 0.2 m yr-1). Thus, these systems are affected by both direct and high magnitude responses and delayed and attenuated responses to climatic variations. This differential evolution appears mainly controlled by (1) the proportion of ice, debris and the presence of water in the ground, and (2) the thickness of the superficial debris layer. |
format |
Article in Journal/Newspaper |
author |
Jean-Baptiste eBosson Christophe eLambiel |
author_facet |
Jean-Baptiste eBosson Christophe eLambiel |
author_sort |
Jean-Baptiste eBosson |
title |
Internal structure and current evolution of very small debris-covered glacier systems located in alpine permafrost environments |
title_short |
Internal structure and current evolution of very small debris-covered glacier systems located in alpine permafrost environments |
title_full |
Internal structure and current evolution of very small debris-covered glacier systems located in alpine permafrost environments |
title_fullStr |
Internal structure and current evolution of very small debris-covered glacier systems located in alpine permafrost environments |
title_full_unstemmed |
Internal structure and current evolution of very small debris-covered glacier systems located in alpine permafrost environments |
title_sort |
internal structure and current evolution of very small debris-covered glacier systems located in alpine permafrost environments |
publisher |
Frontiers Media S.A. |
publishDate |
2016 |
url |
https://doi.org/10.3389/feart.2016.00039 https://doaj.org/article/ab68fbfe8c5b4234abded6e639ccd8cb |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Frontiers in Earth Science, Vol 4 (2016) |
op_relation |
http://journal.frontiersin.org/Journal/10.3389/feart.2016.00039/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2016.00039 https://doaj.org/article/ab68fbfe8c5b4234abded6e639ccd8cb |
op_doi |
https://doi.org/10.3389/feart.2016.00039 |
container_title |
Frontiers in Earth Science |
container_volume |
4 |
_version_ |
1766027144488550400 |