Conceptual model for the formation of bedforms along subglacial meltwater corridors (SMCs) by variable ice‐water‐bed interactions
Abstract Subglacial meltwater landforms found on palaeo‐ice sheet beds allow the properties of meltwater drainage to be reconstructed, informing our understanding of modern‐day subglacial hydrological processes. In northern Canada and Fennoscandia, subglacial meltwater landforms are largely organize...
Published in: | Earth Surface Processes and Landforms |
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Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2023
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Subjects: | |
Online Access: | https://hal.science/hal-04254000 https://hal.science/hal-04254000/document https://hal.science/hal-04254000/file/Earth%20Surf%20Processes%20Landf%20-%202023%20-%20V%20rit%20-%20Conceptual%20model%20for%20the%20formation%20of%20bedforms%20along%20subglacial%20meltwater.pdf https://doi.org/10.1002/esp.5725 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology Vérité, Jean Livingstone, Stephen Ravier, Edouard Mcmartin, Isabelle Campbell, Janet Lewington, Emma Dewald, Nico Clark, Chris Sole, Andrew Storrar, Robert Conceptual model for the formation of bedforms along subglacial meltwater corridors (SMCs) by variable ice‐water‐bed interactions |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
description |
Abstract Subglacial meltwater landforms found on palaeo‐ice sheet beds allow the properties of meltwater drainage to be reconstructed, informing our understanding of modern‐day subglacial hydrological processes. In northern Canada and Fennoscandia, subglacial meltwater landforms are largely organized into continental‐scale networks of subglacial meltwater corridors (SMCs), interpreted as the relics of subglacial drainage systems undergoing variations in meltwater input, effective pressure and drainage efficiency. We review the current state of knowledge of bedforms (hummocks, ridges, murtoos, ribbed bedforms) and associated landforms (channels, eskers) described along SMCs and use selected high‐resolution DEMs in Canada and Fennoscandia to complete the bedform catalogue and categorize their characteristics, patterning and spatial distributions. We synthesize the diversity of bedform and formation processes occurring along subglacial drainage routes in a conceptual model invoking spatiotemporal changes in hydraulic connectivity, basal meltwater pressure and ice‐bed coupling, which influences the evolution of subglacial processes (bed deformation, erosion, deposition) along subglacial drainage systems. When the hydraulic capacity of the subglacial drainage system is overwhelmed glaciofluvial erosion and deposition will dominate in the SMC, resulting in tracts of hummocks and ridges arising from both fragmentation of underlying pre‐existing bedforms and downstream deposition of sediments in basal cavities and crevasses. Re‐coupling of ice with the bed, when meltwater supply decreases, facilitates deformation, transforming existing and producing new bedforms concomitant with the wider subglacial bedform imprint. We finally establish a range of future research perspectives to improve understanding of subglacial hydrology, geomorphic processes and bedform diversity along SMCs. These perspectives include the new acquisition of remote‐sensing and field‐based sedimentological and geomorphological data, a better ... |
author2 |
Laboratoire de Planétologie et Géosciences - Le Mans (LPG - Le Mans) Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG) Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ) ANR-18-CE01-0009,Ice-Collapse,Dynamique d'éffondrement d'une calotte glaciaire en période de déglaciation(2018) |
format |
Article in Journal/Newspaper |
author |
Vérité, Jean Livingstone, Stephen Ravier, Edouard Mcmartin, Isabelle Campbell, Janet Lewington, Emma Dewald, Nico Clark, Chris Sole, Andrew Storrar, Robert |
author_facet |
Vérité, Jean Livingstone, Stephen Ravier, Edouard Mcmartin, Isabelle Campbell, Janet Lewington, Emma Dewald, Nico Clark, Chris Sole, Andrew Storrar, Robert |
author_sort |
Vérité, Jean |
title |
Conceptual model for the formation of bedforms along subglacial meltwater corridors (SMCs) by variable ice‐water‐bed interactions |
title_short |
Conceptual model for the formation of bedforms along subglacial meltwater corridors (SMCs) by variable ice‐water‐bed interactions |
title_full |
Conceptual model for the formation of bedforms along subglacial meltwater corridors (SMCs) by variable ice‐water‐bed interactions |
title_fullStr |
Conceptual model for the formation of bedforms along subglacial meltwater corridors (SMCs) by variable ice‐water‐bed interactions |
title_full_unstemmed |
Conceptual model for the formation of bedforms along subglacial meltwater corridors (SMCs) by variable ice‐water‐bed interactions |
title_sort |
conceptual model for the formation of bedforms along subglacial meltwater corridors (smcs) by variable ice‐water‐bed interactions |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04254000 https://hal.science/hal-04254000/document https://hal.science/hal-04254000/file/Earth%20Surf%20Processes%20Landf%20-%202023%20-%20V%20rit%20-%20Conceptual%20model%20for%20the%20formation%20of%20bedforms%20along%20subglacial%20meltwater.pdf https://doi.org/10.1002/esp.5725 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Fennoscandia Ice Sheet |
genre_facet |
Fennoscandia Ice Sheet |
op_source |
ISSN: 0197-9337 EISSN: 1096-9837 Earth Surface Processes and Landforms https://hal.science/hal-04254000 Earth Surface Processes and Landforms, 2023, ⟨10.1002/esp.5725⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/esp.5725 hal-04254000 https://hal.science/hal-04254000 https://hal.science/hal-04254000/document https://hal.science/hal-04254000/file/Earth%20Surf%20Processes%20Landf%20-%202023%20-%20V%20rit%20-%20Conceptual%20model%20for%20the%20formation%20of%20bedforms%20along%20subglacial%20meltwater.pdf doi:10.1002/esp.5725 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/esp.5725 |
container_title |
Earth Surface Processes and Landforms |
_version_ |
1790600057502826496 |
spelling |
ftinsu:oai:HAL:hal-04254000v1 2024-02-11T10:03:44+01:00 Conceptual model for the formation of bedforms along subglacial meltwater corridors (SMCs) by variable ice‐water‐bed interactions Vérité, Jean Livingstone, Stephen Ravier, Edouard Mcmartin, Isabelle Campbell, Janet Lewington, Emma Dewald, Nico Clark, Chris Sole, Andrew Storrar, Robert Laboratoire de Planétologie et Géosciences - Le Mans (LPG - Le Mans) Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG) Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ) ANR-18-CE01-0009,Ice-Collapse,Dynamique d'éffondrement d'une calotte glaciaire en période de déglaciation(2018) 2023-10-21 https://hal.science/hal-04254000 https://hal.science/hal-04254000/document https://hal.science/hal-04254000/file/Earth%20Surf%20Processes%20Landf%20-%202023%20-%20V%20rit%20-%20Conceptual%20model%20for%20the%20formation%20of%20bedforms%20along%20subglacial%20meltwater.pdf https://doi.org/10.1002/esp.5725 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1002/esp.5725 hal-04254000 https://hal.science/hal-04254000 https://hal.science/hal-04254000/document https://hal.science/hal-04254000/file/Earth%20Surf%20Processes%20Landf%20-%202023%20-%20V%20rit%20-%20Conceptual%20model%20for%20the%20formation%20of%20bedforms%20along%20subglacial%20meltwater.pdf doi:10.1002/esp.5725 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0197-9337 EISSN: 1096-9837 Earth Surface Processes and Landforms https://hal.science/hal-04254000 Earth Surface Processes and Landforms, 2023, ⟨10.1002/esp.5725⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology info:eu-repo/semantics/article Journal articles 2023 ftinsu https://doi.org/10.1002/esp.5725 2024-01-24T17:25:51Z Abstract Subglacial meltwater landforms found on palaeo‐ice sheet beds allow the properties of meltwater drainage to be reconstructed, informing our understanding of modern‐day subglacial hydrological processes. In northern Canada and Fennoscandia, subglacial meltwater landforms are largely organized into continental‐scale networks of subglacial meltwater corridors (SMCs), interpreted as the relics of subglacial drainage systems undergoing variations in meltwater input, effective pressure and drainage efficiency. We review the current state of knowledge of bedforms (hummocks, ridges, murtoos, ribbed bedforms) and associated landforms (channels, eskers) described along SMCs and use selected high‐resolution DEMs in Canada and Fennoscandia to complete the bedform catalogue and categorize their characteristics, patterning and spatial distributions. We synthesize the diversity of bedform and formation processes occurring along subglacial drainage routes in a conceptual model invoking spatiotemporal changes in hydraulic connectivity, basal meltwater pressure and ice‐bed coupling, which influences the evolution of subglacial processes (bed deformation, erosion, deposition) along subglacial drainage systems. When the hydraulic capacity of the subglacial drainage system is overwhelmed glaciofluvial erosion and deposition will dominate in the SMC, resulting in tracts of hummocks and ridges arising from both fragmentation of underlying pre‐existing bedforms and downstream deposition of sediments in basal cavities and crevasses. Re‐coupling of ice with the bed, when meltwater supply decreases, facilitates deformation, transforming existing and producing new bedforms concomitant with the wider subglacial bedform imprint. We finally establish a range of future research perspectives to improve understanding of subglacial hydrology, geomorphic processes and bedform diversity along SMCs. These perspectives include the new acquisition of remote‐sensing and field‐based sedimentological and geomorphological data, a better ... Article in Journal/Newspaper Fennoscandia Ice Sheet Institut national des sciences de l'Univers: HAL-INSU Canada Earth Surface Processes and Landforms |