Incision and aggradation in proglacial rivers: Post-Little Ice Age long-profile adjustments of Southern Iceland outwash plains
International audience The retreat of glaciers in response to climate warming leads to substantial changes in meltwater and sediment yield. Glacial shrinkage also induces the emergence and growth of proglacial margin landforms which strongly affect water and sedimentary transfers from the glacier to...
Published in: | Land Degradation & Development |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Subjects: | |
Online Access: | https://hal.science/hal-01897894 https://hal.science/hal-01897894/document https://hal.science/hal-01897894/file/ROUSSEL_ET_AL_2018.pdf https://doi.org/10.1002/ldr.3127 |
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ftunivlyon2:oai:HAL:hal-01897894v1 |
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institution |
Open Polar |
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Portail HAL de l'Université Lumière Lyon 2 |
op_collection_id |
ftunivlyon2 |
language |
English |
topic |
proglacial river glacial retreat proglacial landforms fluvial geomorphology paraglacial processes [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
spellingShingle |
proglacial river glacial retreat proglacial landforms fluvial geomorphology paraglacial processes [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology Roussel, Erwan Marren, Philip Cossart, Etienne Toumazet, Jean-Pierre Chenet, Marie Grancher, Delphine Jomelli, Vincent Incision and aggradation in proglacial rivers: Post-Little Ice Age long-profile adjustments of Southern Iceland outwash plains |
topic_facet |
proglacial river glacial retreat proglacial landforms fluvial geomorphology paraglacial processes [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
description |
International audience The retreat of glaciers in response to climate warming leads to substantial changes in meltwater and sediment yield. Glacial shrinkage also induces the emergence and growth of proglacial margin landforms which strongly affect water and sedimentary transfers from the glacier to the outwash plains. On a decadal-timescale, field observations show that outwash plains of retreating glaciers typically exhibit proximal incision which decreases in magnitude downstream and stops at an inflection point where aggradation begins. Nevertheless, there is a lack of knowledge about the rates and magnitude of this fluvial adjustment and the effects of the proglacial margin configuration on the temperance or the aggravation of this fluvial adjustment to glacier retreat. This paper investigates the proglacial rivers of 14 retreating glaciers in southeast Iceland over a post-Little Ice Age timescale, combining fluvial deposits mapping, lichenometric dating and long-profile measurements of proglacial fluvial terraces. Our results demonstrate that: (1) proximal incision, associated with distal aggradation and downstream migration of the inflection point is the dominant pattern of proglacial river response to post-LIA glacier retreat in Iceland; (2) estimated mean rates of downstream migration of the inflection point range between 5 and 46 m.a-1 (3) the downstream migration rate of the inflection point is positively correlated with the proportion of proglacial lakes within the glacier foreland. These findings suggest that proglacial margins dominated by proglacial lakes intensify the rates of proximal incision and inflection point migration |
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) Environnement, Ville, Société (EVS) École normale supérieure de Lyon (ENS de Lyon)-École des Mines de Saint-Étienne (Mines Saint-Étienne MSE) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-Université Lumière - Lyon 2 (UL2)-Université Jean Moulin - Lyon 3 (UJML) Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon) Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-École Nationale des Travaux Publics de l'État (ENTPE)-École nationale supérieure d'architecture de Lyon (ENSAL)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) ANR-11-LABX-0046,Dynamite,Dynamiques Territoriales et spatiales(2011) |
format |
Article in Journal/Newspaper |
author |
Roussel, Erwan Marren, Philip Cossart, Etienne Toumazet, Jean-Pierre Chenet, Marie Grancher, Delphine Jomelli, Vincent |
author_facet |
Roussel, Erwan Marren, Philip Cossart, Etienne Toumazet, Jean-Pierre Chenet, Marie Grancher, Delphine Jomelli, Vincent |
author_sort |
Roussel, Erwan |
title |
Incision and aggradation in proglacial rivers: Post-Little Ice Age long-profile adjustments of Southern Iceland outwash plains |
title_short |
Incision and aggradation in proglacial rivers: Post-Little Ice Age long-profile adjustments of Southern Iceland outwash plains |
title_full |
Incision and aggradation in proglacial rivers: Post-Little Ice Age long-profile adjustments of Southern Iceland outwash plains |
title_fullStr |
Incision and aggradation in proglacial rivers: Post-Little Ice Age long-profile adjustments of Southern Iceland outwash plains |
title_full_unstemmed |
Incision and aggradation in proglacial rivers: Post-Little Ice Age long-profile adjustments of Southern Iceland outwash plains |
title_sort |
incision and aggradation in proglacial rivers: post-little ice age long-profile adjustments of southern iceland outwash plains |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-01897894 https://hal.science/hal-01897894/document https://hal.science/hal-01897894/file/ROUSSEL_ET_AL_2018.pdf https://doi.org/10.1002/ldr.3127 |
genre |
glacier Iceland |
genre_facet |
glacier Iceland |
op_source |
ISSN: 1085-3278 EISSN: 1099-145X Land Degradation and Development https://hal.science/hal-01897894 Land Degradation and Development, 2018, ⟨10.1002/ldr.3127⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ldr.3127 hal-01897894 https://hal.science/hal-01897894 https://hal.science/hal-01897894/document https://hal.science/hal-01897894/file/ROUSSEL_ET_AL_2018.pdf doi:10.1002/ldr.3127 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/ldr.3127 |
container_title |
Land Degradation & Development |
container_volume |
29 |
container_issue |
10 |
container_start_page |
3753 |
op_container_end_page |
3771 |
_version_ |
1799480316094578688 |
spelling |
ftunivlyon2:oai:HAL:hal-01897894v1 2024-05-19T07:40:44+00:00 Incision and aggradation in proglacial rivers: Post-Little Ice Age long-profile adjustments of Southern Iceland outwash plains Roussel, Erwan Marren, Philip Cossart, Etienne Toumazet, Jean-Pierre Chenet, Marie Grancher, Delphine Jomelli, Vincent 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) Environnement, Ville, Société (EVS) École normale supérieure de Lyon (ENS de Lyon)-École des Mines de Saint-Étienne (Mines Saint-Étienne MSE) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-Université Lumière - Lyon 2 (UL2)-Université Jean Moulin - Lyon 3 (UJML) Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon) Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-École Nationale des Travaux Publics de l'État (ENTPE)-École nationale supérieure d'architecture de Lyon (ENSAL)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) ANR-11-LABX-0046,Dynamite,Dynamiques Territoriales et spatiales(2011) 2018-07-23 https://hal.science/hal-01897894 https://hal.science/hal-01897894/document https://hal.science/hal-01897894/file/ROUSSEL_ET_AL_2018.pdf https://doi.org/10.1002/ldr.3127 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1002/ldr.3127 hal-01897894 https://hal.science/hal-01897894 https://hal.science/hal-01897894/document https://hal.science/hal-01897894/file/ROUSSEL_ET_AL_2018.pdf doi:10.1002/ldr.3127 info:eu-repo/semantics/OpenAccess ISSN: 1085-3278 EISSN: 1099-145X Land Degradation and Development https://hal.science/hal-01897894 Land Degradation and Development, 2018, ⟨10.1002/ldr.3127⟩ proglacial river glacial retreat proglacial landforms fluvial geomorphology paraglacial processes [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology info:eu-repo/semantics/article Journal articles 2018 ftunivlyon2 https://doi.org/10.1002/ldr.3127 2024-04-22T00:50:50Z International audience The retreat of glaciers in response to climate warming leads to substantial changes in meltwater and sediment yield. Glacial shrinkage also induces the emergence and growth of proglacial margin landforms which strongly affect water and sedimentary transfers from the glacier to the outwash plains. On a decadal-timescale, field observations show that outwash plains of retreating glaciers typically exhibit proximal incision which decreases in magnitude downstream and stops at an inflection point where aggradation begins. Nevertheless, there is a lack of knowledge about the rates and magnitude of this fluvial adjustment and the effects of the proglacial margin configuration on the temperance or the aggravation of this fluvial adjustment to glacier retreat. This paper investigates the proglacial rivers of 14 retreating glaciers in southeast Iceland over a post-Little Ice Age timescale, combining fluvial deposits mapping, lichenometric dating and long-profile measurements of proglacial fluvial terraces. Our results demonstrate that: (1) proximal incision, associated with distal aggradation and downstream migration of the inflection point is the dominant pattern of proglacial river response to post-LIA glacier retreat in Iceland; (2) estimated mean rates of downstream migration of the inflection point range between 5 and 46 m.a-1 (3) the downstream migration rate of the inflection point is positively correlated with the proportion of proglacial lakes within the glacier foreland. These findings suggest that proglacial margins dominated by proglacial lakes intensify the rates of proximal incision and inflection point migration Article in Journal/Newspaper glacier Iceland Portail HAL de l'Université Lumière Lyon 2 Land Degradation & Development 29 10 3753 3771 |