Responses of south-Iceland glaciers and sandurs to post-Little Ice Age climate change : patterns and temporal rhythms adjustments of the glacio-fluvial continuum
Based on a systemic approach, this study intends to characterize the patterns and the temporal rhythms of the glacio-fluvial continuum adjustment to the post-Little Ice Age climate change. According to lichenometric dating and quantification of the glacial and fluvioglacial responses of fifteen glac...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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2011
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Online Access: | https://theses.hal.science/tel-00705325 https://theses.hal.science/tel-00705325/document https://theses.hal.science/tel-00705325/file/Roussel-E-2011-07.pdf |
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ftunivnantes:oai:HAL:tel-00705325v1 2023-05-15T16:21:42+02:00 Responses of south-Iceland glaciers and sandurs to post-Little Ice Age climate change : patterns and temporal rhythms adjustments of the glacio-fluvial continuum Réponses des glaciers et des sandurs sud-islandais au réchauffement climatique post-petit âge glaciaire : Modalités et rythmes d’ajustement du continuum glacio-fluvial Roussel, Erwan Laboratoire de Géographie Physique et Environnementale (GEOLAB) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM) Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA) Université Blaise Pascal - Clermont-Ferrand II Marie-Françoise André 2011-07-05 https://theses.hal.science/tel-00705325 https://theses.hal.science/tel-00705325/document https://theses.hal.science/tel-00705325/file/Roussel-E-2011-07.pdf fr fre HAL CCSD NNT: 2011CLF20004 tel-00705325 https://theses.hal.science/tel-00705325 https://theses.hal.science/tel-00705325/document https://theses.hal.science/tel-00705325/file/Roussel-E-2011-07.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00705325 Sciences de la Terre. Université Blaise Pascal - Clermont-Ferrand II, 2011. Français. ⟨NNT : 2011CLF20004⟩ Glacial and fluvioglacial dynamics Iceland Geomorphic impacts of post-LIA climate change Dynamiques glaciaires et fluvioglaciaires Islande Impacts géomorphologiques du changement climatique post-PAG [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SHS.GEO]Humanities and Social Sciences/Geography info:eu-repo/semantics/doctoralThesis Theses 2011 ftunivnantes 2023-02-08T00:28:13Z Based on a systemic approach, this study intends to characterize the patterns and the temporal rhythms of the glacio-fluvial continuum adjustment to the post-Little Ice Age climate change. According to lichenometric dating and quantification of the glacial and fluvioglacial responses of fifteen glaciers tongues and sandurs in south-Iceland, the range of observed adjustments scenarios is explored. The heterogeneous and asynchronous nature of responses are tested and the variables controlling the observed adjustment variability are identified. Based on the collected and analyzed data sets: (i) we highlight the asynchronous LIA maximum extent of south-Icelandic glaciers and the significant heterogeneity in glacier fronts retreat intensity which both reflect the complex nature of glacier response to climate change; (ii) we suggest the existence of marginal processes akin to self-organized criticality which control sediment transport efficiency and water discharges; (iii) we identify a prevailing pattern for the post-LIA fluvial adjustment of sandur type I and the independent response of jökulhlaup sandur (type III) to glacier front fluctuations. A travers une approche systémique, l’objectif de cette thèse est de préciser les modes et les rythmes d’ajustement du continuum glacio-fluvial au changement climatique post-Petit Âge Glaciaire. À partir de la datation lichénométrique et de la quantification des réponses des systèmes glaciaire et fluvioglaciaire de quinze émissaires et sandurs sud-islandais, nous explorons l’éventail des scénarios d’ajustements observés, testons l’hétérogénéité et le caractère asynchrone des réponses glaciaires et fluvioglaciaires et cernons les variables de contrôle susceptibles d’expliquer la diversité des réponses mesurées. Sur la base des données collectées, traitées et analysées, nous avons pu : (1) mettre en évidence une asynchronie du maximum PAG glaciaire et une forte hétérogénéité de l’intensité de recul post-PAG des émissaires sud-islandais reflétant la nature fondamentalement ... Doctoral or Postdoctoral Thesis glacier Iceland Islande Université de Nantes: HAL-UNIV-NANTES |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
French |
topic |
Glacial and fluvioglacial dynamics Iceland Geomorphic impacts of post-LIA climate change Dynamiques glaciaires et fluvioglaciaires Islande Impacts géomorphologiques du changement climatique post-PAG [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SHS.GEO]Humanities and Social Sciences/Geography |
spellingShingle |
Glacial and fluvioglacial dynamics Iceland Geomorphic impacts of post-LIA climate change Dynamiques glaciaires et fluvioglaciaires Islande Impacts géomorphologiques du changement climatique post-PAG [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SHS.GEO]Humanities and Social Sciences/Geography Roussel, Erwan Responses of south-Iceland glaciers and sandurs to post-Little Ice Age climate change : patterns and temporal rhythms adjustments of the glacio-fluvial continuum |
topic_facet |
Glacial and fluvioglacial dynamics Iceland Geomorphic impacts of post-LIA climate change Dynamiques glaciaires et fluvioglaciaires Islande Impacts géomorphologiques du changement climatique post-PAG [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SHS.GEO]Humanities and Social Sciences/Geography |
description |
Based on a systemic approach, this study intends to characterize the patterns and the temporal rhythms of the glacio-fluvial continuum adjustment to the post-Little Ice Age climate change. According to lichenometric dating and quantification of the glacial and fluvioglacial responses of fifteen glaciers tongues and sandurs in south-Iceland, the range of observed adjustments scenarios is explored. The heterogeneous and asynchronous nature of responses are tested and the variables controlling the observed adjustment variability are identified. Based on the collected and analyzed data sets: (i) we highlight the asynchronous LIA maximum extent of south-Icelandic glaciers and the significant heterogeneity in glacier fronts retreat intensity which both reflect the complex nature of glacier response to climate change; (ii) we suggest the existence of marginal processes akin to self-organized criticality which control sediment transport efficiency and water discharges; (iii) we identify a prevailing pattern for the post-LIA fluvial adjustment of sandur type I and the independent response of jökulhlaup sandur (type III) to glacier front fluctuations. A travers une approche systémique, l’objectif de cette thèse est de préciser les modes et les rythmes d’ajustement du continuum glacio-fluvial au changement climatique post-Petit Âge Glaciaire. À partir de la datation lichénométrique et de la quantification des réponses des systèmes glaciaire et fluvioglaciaire de quinze émissaires et sandurs sud-islandais, nous explorons l’éventail des scénarios d’ajustements observés, testons l’hétérogénéité et le caractère asynchrone des réponses glaciaires et fluvioglaciaires et cernons les variables de contrôle susceptibles d’expliquer la diversité des réponses mesurées. Sur la base des données collectées, traitées et analysées, nous avons pu : (1) mettre en évidence une asynchronie du maximum PAG glaciaire et une forte hétérogénéité de l’intensité de recul post-PAG des émissaires sud-islandais reflétant la nature fondamentalement ... |
author2 |
Laboratoire de Géographie Physique et Environnementale (GEOLAB) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM) Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA) Université Blaise Pascal - Clermont-Ferrand II Marie-Françoise André |
format |
Doctoral or Postdoctoral Thesis |
author |
Roussel, Erwan |
author_facet |
Roussel, Erwan |
author_sort |
Roussel, Erwan |
title |
Responses of south-Iceland glaciers and sandurs to post-Little Ice Age climate change : patterns and temporal rhythms adjustments of the glacio-fluvial continuum |
title_short |
Responses of south-Iceland glaciers and sandurs to post-Little Ice Age climate change : patterns and temporal rhythms adjustments of the glacio-fluvial continuum |
title_full |
Responses of south-Iceland glaciers and sandurs to post-Little Ice Age climate change : patterns and temporal rhythms adjustments of the glacio-fluvial continuum |
title_fullStr |
Responses of south-Iceland glaciers and sandurs to post-Little Ice Age climate change : patterns and temporal rhythms adjustments of the glacio-fluvial continuum |
title_full_unstemmed |
Responses of south-Iceland glaciers and sandurs to post-Little Ice Age climate change : patterns and temporal rhythms adjustments of the glacio-fluvial continuum |
title_sort |
responses of south-iceland glaciers and sandurs to post-little ice age climate change : patterns and temporal rhythms adjustments of the glacio-fluvial continuum |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://theses.hal.science/tel-00705325 https://theses.hal.science/tel-00705325/document https://theses.hal.science/tel-00705325/file/Roussel-E-2011-07.pdf |
genre |
glacier Iceland Islande |
genre_facet |
glacier Iceland Islande |
op_source |
https://theses.hal.science/tel-00705325 Sciences de la Terre. Université Blaise Pascal - Clermont-Ferrand II, 2011. Français. ⟨NNT : 2011CLF20004⟩ |
op_relation |
NNT: 2011CLF20004 tel-00705325 https://theses.hal.science/tel-00705325 https://theses.hal.science/tel-00705325/document https://theses.hal.science/tel-00705325/file/Roussel-E-2011-07.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766009693971415040 |