Temperature distribution in a permafrost-affected rock ridge from conductivity and induced polarization tomography
International audience SUMMARY Knowledge of the thermal state of steep alpine rock faces is crucial to assess potential geohazards associated with the degradation of permafrost. Temperature measurements at the rock surface or in boreholes are however expensive, invasive, and provide spatially limite...
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Online Access: | https://hal.science/hal-04024655 https://hal.science/hal-04024655/document https://hal.science/hal-04024655/file/GJI_Cosmiques_V11.pdf https://doi.org/10.1093/gji/ggaa597 |
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ftunivsavoie:oai:HAL:hal-04024655v1 2024-02-11T10:07:49+01:00 Temperature distribution in a permafrost-affected rock ridge from conductivity and induced polarization tomography Duvillard, P-A Magnin, Florence Revil, A Legay, A Ravanel, L Abdulsamad, F Coperey, A Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) 2021 https://hal.science/hal-04024655 https://hal.science/hal-04024655/document https://hal.science/hal-04024655/file/GJI_Cosmiques_V11.pdf https://doi.org/10.1093/gji/ggaa597 en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggaa597 hal-04024655 https://hal.science/hal-04024655 https://hal.science/hal-04024655/document https://hal.science/hal-04024655/file/GJI_Cosmiques_V11.pdf doi:10.1093/gji/ggaa597 info:eu-repo/semantics/OpenAccess ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-04024655 Geophysical Journal International, 2021, 225 (2), pp.1207-1221. ⟨10.1093/gji/ggaa597⟩ high-Alpine rock ridge electrical conductivity freezing curve permafrost [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2021 ftunivsavoie https://doi.org/10.1093/gji/ggaa597 2024-01-23T23:35:52Z International audience SUMMARY Knowledge of the thermal state of steep alpine rock faces is crucial to assess potential geohazards associated with the degradation of permafrost. Temperature measurements at the rock surface or in boreholes are however expensive, invasive, and provide spatially limited information. Electrical conductivity and induced polarization tomography can detect permafrost. We test here a recently developed petrophysical model based on the use of an exponential freezing curve applied to both electrical conductivity and normalized chargeability to infer the distribution of temperature below the freezing temperature. We then apply this approach to obtain the temperature distribution from electrical conductivity and normalized chargeability field data obtained across a profile extending from the SE to NW faces of the lower Cosmiques ridge (Mont Blanc massif, Western European Alps, 3613 m a.s.l., France). The geophysical data sets were acquired both in 2016 and 2019. The results indicate that only the NW face of the rock ridge is frozen. To evaluate our results, we model the bedrock temperature across this rock ridge using CryoGRID2, a 1-D MATLAB diffusive transient thermal model and surface temperature time-series. The modelled temperature profile confirms the presence of permafrost in a way that is consistent with that obtained from the geophysical data. Our study offers a promising low-cost approach to monitor temperature distribution in Alpine rock walls and ridges in response to climate change. Article in Journal/Newspaper permafrost Université Savoie Mont Blanc: HAL Mont Blanc ENVELOPE(69.468,69.468,-49.461,-49.461) Geophysical Journal International 225 2 1207 1221 |
institution |
Open Polar |
collection |
Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
high-Alpine rock ridge electrical conductivity freezing curve permafrost [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
high-Alpine rock ridge electrical conductivity freezing curve permafrost [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Duvillard, P-A Magnin, Florence Revil, A Legay, A Ravanel, L Abdulsamad, F Coperey, A Temperature distribution in a permafrost-affected rock ridge from conductivity and induced polarization tomography |
topic_facet |
high-Alpine rock ridge electrical conductivity freezing curve permafrost [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience SUMMARY Knowledge of the thermal state of steep alpine rock faces is crucial to assess potential geohazards associated with the degradation of permafrost. Temperature measurements at the rock surface or in boreholes are however expensive, invasive, and provide spatially limited information. Electrical conductivity and induced polarization tomography can detect permafrost. We test here a recently developed petrophysical model based on the use of an exponential freezing curve applied to both electrical conductivity and normalized chargeability to infer the distribution of temperature below the freezing temperature. We then apply this approach to obtain the temperature distribution from electrical conductivity and normalized chargeability field data obtained across a profile extending from the SE to NW faces of the lower Cosmiques ridge (Mont Blanc massif, Western European Alps, 3613 m a.s.l., France). The geophysical data sets were acquired both in 2016 and 2019. The results indicate that only the NW face of the rock ridge is frozen. To evaluate our results, we model the bedrock temperature across this rock ridge using CryoGRID2, a 1-D MATLAB diffusive transient thermal model and surface temperature time-series. The modelled temperature profile confirms the presence of permafrost in a way that is consistent with that obtained from the geophysical data. Our study offers a promising low-cost approach to monitor temperature distribution in Alpine rock walls and ridges in response to climate change. |
author2 |
Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Duvillard, P-A Magnin, Florence Revil, A Legay, A Ravanel, L Abdulsamad, F Coperey, A |
author_facet |
Duvillard, P-A Magnin, Florence Revil, A Legay, A Ravanel, L Abdulsamad, F Coperey, A |
author_sort |
Duvillard, P-A |
title |
Temperature distribution in a permafrost-affected rock ridge from conductivity and induced polarization tomography |
title_short |
Temperature distribution in a permafrost-affected rock ridge from conductivity and induced polarization tomography |
title_full |
Temperature distribution in a permafrost-affected rock ridge from conductivity and induced polarization tomography |
title_fullStr |
Temperature distribution in a permafrost-affected rock ridge from conductivity and induced polarization tomography |
title_full_unstemmed |
Temperature distribution in a permafrost-affected rock ridge from conductivity and induced polarization tomography |
title_sort |
temperature distribution in a permafrost-affected rock ridge from conductivity and induced polarization tomography |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-04024655 https://hal.science/hal-04024655/document https://hal.science/hal-04024655/file/GJI_Cosmiques_V11.pdf https://doi.org/10.1093/gji/ggaa597 |
long_lat |
ENVELOPE(69.468,69.468,-49.461,-49.461) |
geographic |
Mont Blanc |
geographic_facet |
Mont Blanc |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-04024655 Geophysical Journal International, 2021, 225 (2), pp.1207-1221. ⟨10.1093/gji/ggaa597⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggaa597 hal-04024655 https://hal.science/hal-04024655 https://hal.science/hal-04024655/document https://hal.science/hal-04024655/file/GJI_Cosmiques_V11.pdf doi:10.1093/gji/ggaa597 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1093/gji/ggaa597 |
container_title |
Geophysical Journal International |
container_volume |
225 |
container_issue |
2 |
container_start_page |
1207 |
op_container_end_page |
1221 |
_version_ |
1790606596445831168 |