Local and regional permafrost monitoring in the actual climate change context: application to the Clarée and Ubaye valleys (French Southern Alps)

This work intends to characterize the distribution, the state and the functioning of permafrost at various spatial scales and in various topoclimatic contexts. It also intends determine permafrost response(s) to actual climate change. In order to realize these objectives, our investigations have bee...

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Main Author: Perrier, Romain
Other Authors: Pôle de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG), Université Paris 1 Panthéon-Sorbonne (UP1)-Institut de Recherche pour le Développement (IRD)-École Pratique des Hautes Études (EPHE), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris-Sorbonne (UP4)-AgroParisTech-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris Diderot, Monique Fort, Etienne Cossart
Format: Doctoral or Postdoctoral Thesis
Language:French
Published: HAL CCSD 2014
Subjects:
Ice
Online Access:https://theses.hal.science/tel-01113468
https://theses.hal.science/tel-01113468/document
https://theses.hal.science/tel-01113468/file/Th%C3%A8se_PERRIER_7.pdf
id ftunivparis1:oai:HAL:tel-01113468v1
record_format openpolar
spelling ftunivparis1:oai:HAL:tel-01113468v1 2024-05-19T07:41:49+00:00 Local and regional permafrost monitoring in the actual climate change context: application to the Clarée and Ubaye valleys (French Southern Alps) Suivi local et régional du pergélisol dans le cadre du changement climatique contemporain : application aux vallées de la Clarée et de l'Ubaye (Alpes du sud, France) Perrier, Romain Pôle de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG) Université Paris 1 Panthéon-Sorbonne (UP1)-Institut de Recherche pour le Développement (IRD)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris-Sorbonne (UP4)-AgroParisTech-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) Université Paris Diderot Monique Fort Etienne Cossart 2014-12-10 https://theses.hal.science/tel-01113468 https://theses.hal.science/tel-01113468/document https://theses.hal.science/tel-01113468/file/Th%C3%A8se_PERRIER_7.pdf fr fre HAL CCSD tel-01113468 https://theses.hal.science/tel-01113468 https://theses.hal.science/tel-01113468/document https://theses.hal.science/tel-01113468/file/Th%C3%A8se_PERRIER_7.pdf http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01113468 Géographie. Université Paris Diderot, 2014. Français. ⟨NNT : ⟩ rockglacier French Southern Alps Clarée valley climate change Ubaye valley Permafrost Ubaye Clarée Alpes du sud changement climatique glacier rocheux Pergélisol [SHS.GEO]Humanities and Social Sciences/Geography info:eu-repo/semantics/doctoralThesis Theses 2014 ftunivparis1 2024-04-25T00:03:11Z This work intends to characterize the distribution, the state and the functioning of permafrost at various spatial scales and in various topoclimatic contexts. It also intends determine permafrost response(s) to actual climate change. In order to realize these objectives, our investigations have been carried out in two valleys (Clarée and Ubaye) of the French Southern Alps. Firstly, permafrost spatial distribution has been studied at regional scale by means of a statistico-empirical model. Results show that permafrost may be found between 2600 and 3000 m and its distribution is influenced by altitude and solar radiation. Secondly and at the local scale, the implementation of a geophysical, thermal and geodetic monitoring has helped to qualify the regional spatial model as well as to characterize actual permafrost functioning. At rockglacier scale, geophysical investigations reveal a patchy permafrost distribution and a high heterogeneity of ground ice that both may be explained by local geodynamics and recent glacial (LIA) history. Thermal monitoring has revealed the existence of 4 main thermal regimes that mainly depend on snow cover specificities and permafrost occurrence. During the two years (2010-2012) period of monitoring some sites have shown some permafrost thermal disequilibrium with current climate conditions. Geodetic monitoring of rockglaciers shows an annual velocity as well as vertical displacements that range from few centimeters up to a meter. More generally surface displacements are mainly conditioned by local topography and ground ice type. Thirdly, permafrost degradation assessment through rockglacier morphological changes is difficult to determine. Significant morphological changes have only been observed on rockglacier areas that contain ground massive ice inherited from LIA advance. However, the use of permafrost thermal disequilibrium proxies has enabled to build up a regional topo-climatic model together with a map of areas susceptible to thermal disequilibrium. Le présent travail vise ... Doctoral or Postdoctoral Thesis Ice permafrost pergélisol Université Paris 1 Panthéon-Sorbonne: HAL
institution Open Polar
collection Université Paris 1 Panthéon-Sorbonne: HAL
op_collection_id ftunivparis1
language French
topic rockglacier
French Southern Alps
Clarée valley
climate change
Ubaye valley
Permafrost
Ubaye
Clarée
Alpes du sud
changement climatique
glacier rocheux
Pergélisol
[SHS.GEO]Humanities and Social Sciences/Geography
spellingShingle rockglacier
French Southern Alps
Clarée valley
climate change
Ubaye valley
Permafrost
Ubaye
Clarée
Alpes du sud
changement climatique
glacier rocheux
Pergélisol
[SHS.GEO]Humanities and Social Sciences/Geography
Perrier, Romain
Local and regional permafrost monitoring in the actual climate change context: application to the Clarée and Ubaye valleys (French Southern Alps)
topic_facet rockglacier
French Southern Alps
Clarée valley
climate change
Ubaye valley
Permafrost
Ubaye
Clarée
Alpes du sud
changement climatique
glacier rocheux
Pergélisol
[SHS.GEO]Humanities and Social Sciences/Geography
description This work intends to characterize the distribution, the state and the functioning of permafrost at various spatial scales and in various topoclimatic contexts. It also intends determine permafrost response(s) to actual climate change. In order to realize these objectives, our investigations have been carried out in two valleys (Clarée and Ubaye) of the French Southern Alps. Firstly, permafrost spatial distribution has been studied at regional scale by means of a statistico-empirical model. Results show that permafrost may be found between 2600 and 3000 m and its distribution is influenced by altitude and solar radiation. Secondly and at the local scale, the implementation of a geophysical, thermal and geodetic monitoring has helped to qualify the regional spatial model as well as to characterize actual permafrost functioning. At rockglacier scale, geophysical investigations reveal a patchy permafrost distribution and a high heterogeneity of ground ice that both may be explained by local geodynamics and recent glacial (LIA) history. Thermal monitoring has revealed the existence of 4 main thermal regimes that mainly depend on snow cover specificities and permafrost occurrence. During the two years (2010-2012) period of monitoring some sites have shown some permafrost thermal disequilibrium with current climate conditions. Geodetic monitoring of rockglaciers shows an annual velocity as well as vertical displacements that range from few centimeters up to a meter. More generally surface displacements are mainly conditioned by local topography and ground ice type. Thirdly, permafrost degradation assessment through rockglacier morphological changes is difficult to determine. Significant morphological changes have only been observed on rockglacier areas that contain ground massive ice inherited from LIA advance. However, the use of permafrost thermal disequilibrium proxies has enabled to build up a regional topo-climatic model together with a map of areas susceptible to thermal disequilibrium. Le présent travail vise ...
author2 Pôle de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG)
Université Paris 1 Panthéon-Sorbonne (UP1)-Institut de Recherche pour le Développement (IRD)-École Pratique des Hautes Études (EPHE)
Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris-Sorbonne (UP4)-AgroParisTech-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Université Paris Diderot
Monique Fort
Etienne Cossart
format Doctoral or Postdoctoral Thesis
author Perrier, Romain
author_facet Perrier, Romain
author_sort Perrier, Romain
title Local and regional permafrost monitoring in the actual climate change context: application to the Clarée and Ubaye valleys (French Southern Alps)
title_short Local and regional permafrost monitoring in the actual climate change context: application to the Clarée and Ubaye valleys (French Southern Alps)
title_full Local and regional permafrost monitoring in the actual climate change context: application to the Clarée and Ubaye valleys (French Southern Alps)
title_fullStr Local and regional permafrost monitoring in the actual climate change context: application to the Clarée and Ubaye valleys (French Southern Alps)
title_full_unstemmed Local and regional permafrost monitoring in the actual climate change context: application to the Clarée and Ubaye valleys (French Southern Alps)
title_sort local and regional permafrost monitoring in the actual climate change context: application to the clarée and ubaye valleys (french southern alps)
publisher HAL CCSD
publishDate 2014
url https://theses.hal.science/tel-01113468
https://theses.hal.science/tel-01113468/document
https://theses.hal.science/tel-01113468/file/Th%C3%A8se_PERRIER_7.pdf
genre Ice
permafrost
pergélisol
genre_facet Ice
permafrost
pergélisol
op_source https://theses.hal.science/tel-01113468
Géographie. Université Paris Diderot, 2014. Français. ⟨NNT : ⟩
op_relation tel-01113468
https://theses.hal.science/tel-01113468
https://theses.hal.science/tel-01113468/document
https://theses.hal.science/tel-01113468/file/Th%C3%A8se_PERRIER_7.pdf
op_rights http://hal.archives-ouvertes.fr/licences/copyright/
info:eu-repo/semantics/OpenAccess
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