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...
Published in: | Frontiers in Earth Science |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2016
|
Subjects: | |
Online Access: | https://serval.unil.ch/notice/serval:BIB_89BCCAD898EB https://doi.org/10.3389/feart.2016.00039 http://journal.frontiersin.org/ https://serval.unil.ch/resource/serval:BIB_89BCCAD898EB.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_89BCCAD898EB7 |
id |
ftunivlausanne:oai:serval.unil.ch:BIB_89BCCAD898EB |
---|---|
record_format |
openpolar |
spelling |
ftunivlausanne:oai:serval.unil.ch:BIB_89BCCAD898EB 2024-02-11T10:04:38+01:00 Internal Structure and Current Evolution of Very Small Debris-Covered Glacier Systems Located in Alpine Permafrost Environments Bosson, J.-B. Lambiel, C. 2016 application/pdf https://serval.unil.ch/notice/serval:BIB_89BCCAD898EB https://doi.org/10.3389/feart.2016.00039 http://journal.frontiersin.org/ https://serval.unil.ch/resource/serval:BIB_89BCCAD898EB.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_89BCCAD898EB7 eng eng info:eu-repo/semantics/altIdentifier/doi/10.3389/feart.2016.00039 info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_89BCCAD898EB7 https://serval.unil.ch/notice/serval:BIB_89BCCAD898EB doi:10.3389/feart.2016.00039 http://journal.frontiersin.org/ urn:issn:2296-6463 https://serval.unil.ch/resource/serval:BIB_89BCCAD898EB.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_89BCCAD898EB7 info:eu-repo/semantics/restrictedAccess Restricted: indefinite embargo Copying allowed only for non-profit organizations https://serval.unil.ch/disclaimer Frontiers in Earth Science, vol. 4, pp. 1-17 debris-covered glaciers rock glaciers permafrost ground ice electrical resistivity tomography dGPS info:eu-repo/semantics/article article info:eu-repo/semantics/publishedVersion 2016 ftunivlausanne https://doi.org/10.3389/feart.2016.00039 2024-01-22T01:04:27Z 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 (−0.04m yr−1) in the rock glaciers. Here, a constant and slow internal deformation was observed (c. 0.2m 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 Université de Lausanne (UNIL): Serval - Serveur académique lausannois Frontiers in Earth Science 4 |
institution |
Open Polar |
collection |
Université de Lausanne (UNIL): Serval - Serveur académique lausannois |
op_collection_id |
ftunivlausanne |
language |
English |
topic |
debris-covered glaciers rock glaciers permafrost ground ice electrical resistivity tomography dGPS |
spellingShingle |
debris-covered glaciers rock glaciers permafrost ground ice electrical resistivity tomography dGPS Bosson, J.-B. Lambiel, C. Internal Structure and Current Evolution of Very Small Debris-Covered Glacier Systems Located in Alpine Permafrost Environments |
topic_facet |
debris-covered glaciers rock glaciers permafrost ground ice electrical resistivity tomography dGPS |
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 (−0.04m yr−1) in the rock glaciers. Here, a constant and slow internal deformation was observed (c. 0.2m 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 |
Bosson, J.-B. Lambiel, C. |
author_facet |
Bosson, J.-B. Lambiel, C. |
author_sort |
Bosson, J.-B. |
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 |
publishDate |
2016 |
url |
https://serval.unil.ch/notice/serval:BIB_89BCCAD898EB https://doi.org/10.3389/feart.2016.00039 http://journal.frontiersin.org/ https://serval.unil.ch/resource/serval:BIB_89BCCAD898EB.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_89BCCAD898EB7 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Frontiers in Earth Science, vol. 4, pp. 1-17 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/feart.2016.00039 info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_89BCCAD898EB7 https://serval.unil.ch/notice/serval:BIB_89BCCAD898EB doi:10.3389/feart.2016.00039 http://journal.frontiersin.org/ urn:issn:2296-6463 https://serval.unil.ch/resource/serval:BIB_89BCCAD898EB.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_89BCCAD898EB7 |
op_rights |
info:eu-repo/semantics/restrictedAccess Restricted: indefinite embargo Copying allowed only for non-profit organizations https://serval.unil.ch/disclaimer |
op_doi |
https://doi.org/10.3389/feart.2016.00039 |
container_title |
Frontiers in Earth Science |
container_volume |
4 |
_version_ |
1790601329279762432 |