Retreat Pattern of Glaciers Controls the Occurrence of Turbidity Currents on High-Latitude Fjord Deltas (Eastern Baffin Island)
International audience Glacier and ice sheet mass loss as a result of climate change is driving important coastal changes in Arctic fjords. Yet limited information exists for Arctic coasts regarding the influence of glacial erosion and ice mass loss on the occurrence and character of turbidity curre...
Published in: | Journal of Geophysical Research: Earth Surface |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2019
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Subjects: | |
Online Access: | https://hal.science/hal-02363959 https://hal.science/hal-02363959/document https://hal.science/hal-02363959/file/Normandeau%20et%20al.,%202019%20Retreat%20of%20glaciers%20control%20turbidity.pdf https://doi.org/10.1029/2018JF004970 |
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ftunivrennes1hal:oai:HAL:hal-02363959v1 |
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openpolar |
institution |
Open Polar |
collection |
Université de Rennes 1: Publications scientifiques (HAL) |
op_collection_id |
ftunivrennes1hal |
language |
English |
topic |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy |
spellingShingle |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy Normandeau, A Dietrich, Pierre Hughes Clarke, J. van Wychen, W Lajeunesse, P. Burgess, D. Ghienne, J.-F Retreat Pattern of Glaciers Controls the Occurrence of Turbidity Currents on High-Latitude Fjord Deltas (Eastern Baffin Island) |
topic_facet |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy |
description |
International audience Glacier and ice sheet mass loss as a result of climate change is driving important coastal changes in Arctic fjords. Yet limited information exists for Arctic coasts regarding the influence of glacial erosion and ice mass loss on the occurrence and character of turbidity currents in fjords, which themselves affect delta dynamics. Here we show how glacial erosion and the production of meltwaters and sediments associated with the melting of retreating glaciers control the generation of turbidity currents in fjords of eastern Baffin Island (Canada). The subaqueous parts of 31 river mouths along eastern Baffin Island were mapped by high-resolution swath bathymetry in order to assess the presence or absence of sediment waves formed by turbidity currents on delta fronts. By extracting glaciological and hydrological watershed characteristics of these river mouths, we demonstrate that the presence and areal extent of glaciers are a key control for generating turbidity currents in fjords. However, lakes formed upstream during glacial retreat significantly alter the course of sediment routing to the deltas by forming temporary sinks, leading to the cessation of turbidity currents in the fjords. Due to the different deglaciation stages of watersheds in eastern Baffin Island, we put these results into a temporal framework of watershed deglaciation to demonstrate how the retreat pattern of glaciers, through the formation and filling of proglacial lakes, affects the turbidity current activity of deltas. |
author2 |
Geological Survey of Canada Dartmouth (GSC Atlantic) Geological Survey of Canada - Office (GSC) Natural Resources Canada (NRCan)-Natural Resources Canada (NRCan) Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) University of Johannesburg South Africa (UJ) University of New Hampshire (UNH) Université Laval Québec (ULaval) Geological Survey of Canada Ottawa (GSC Central & Northern Canada) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Normandeau, A Dietrich, Pierre Hughes Clarke, J. van Wychen, W Lajeunesse, P. Burgess, D. Ghienne, J.-F |
author_facet |
Normandeau, A Dietrich, Pierre Hughes Clarke, J. van Wychen, W Lajeunesse, P. Burgess, D. Ghienne, J.-F |
author_sort |
Normandeau, A |
title |
Retreat Pattern of Glaciers Controls the Occurrence of Turbidity Currents on High-Latitude Fjord Deltas (Eastern Baffin Island) |
title_short |
Retreat Pattern of Glaciers Controls the Occurrence of Turbidity Currents on High-Latitude Fjord Deltas (Eastern Baffin Island) |
title_full |
Retreat Pattern of Glaciers Controls the Occurrence of Turbidity Currents on High-Latitude Fjord Deltas (Eastern Baffin Island) |
title_fullStr |
Retreat Pattern of Glaciers Controls the Occurrence of Turbidity Currents on High-Latitude Fjord Deltas (Eastern Baffin Island) |
title_full_unstemmed |
Retreat Pattern of Glaciers Controls the Occurrence of Turbidity Currents on High-Latitude Fjord Deltas (Eastern Baffin Island) |
title_sort |
retreat pattern of glaciers controls the occurrence of turbidity currents on high-latitude fjord deltas (eastern baffin island) |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02363959 https://hal.science/hal-02363959/document https://hal.science/hal-02363959/file/Normandeau%20et%20al.,%202019%20Retreat%20of%20glaciers%20control%20turbidity.pdf https://doi.org/10.1029/2018JF004970 |
geographic |
Arctic Baffin Island Canada |
geographic_facet |
Arctic Baffin Island Canada |
genre |
Arctic Baffin Island Baffin Climate change glacier* Ice Sheet |
genre_facet |
Arctic Baffin Island Baffin Climate change glacier* Ice Sheet |
op_source |
ISSN: 2169-9003 EISSN: 2169-9011 Journal of Geophysical Research: Earth Surface https://hal.science/hal-02363959 Journal of Geophysical Research: Earth Surface, 2019, 124 (6), pp.1559-1571. ⟨10.1029/2018JF004970⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JF004970 hal-02363959 https://hal.science/hal-02363959 https://hal.science/hal-02363959/document https://hal.science/hal-02363959/file/Normandeau%20et%20al.,%202019%20Retreat%20of%20glaciers%20control%20turbidity.pdf doi:10.1029/2018JF004970 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2018JF004970 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
124 |
container_issue |
6 |
container_start_page |
1559 |
op_container_end_page |
1571 |
_version_ |
1790596811871748096 |
spelling |
ftunivrennes1hal:oai:HAL:hal-02363959v1 2024-02-11T10:01:04+01:00 Retreat Pattern of Glaciers Controls the Occurrence of Turbidity Currents on High-Latitude Fjord Deltas (Eastern Baffin Island) Normandeau, A Dietrich, Pierre Hughes Clarke, J. van Wychen, W Lajeunesse, P. Burgess, D. Ghienne, J.-F Geological Survey of Canada Dartmouth (GSC Atlantic) Geological Survey of Canada - Office (GSC) Natural Resources Canada (NRCan)-Natural Resources Canada (NRCan) Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) University of Johannesburg South Africa (UJ) University of New Hampshire (UNH) Université Laval Québec (ULaval) Geological Survey of Canada Ottawa (GSC Central & Northern Canada) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2019-06 https://hal.science/hal-02363959 https://hal.science/hal-02363959/document https://hal.science/hal-02363959/file/Normandeau%20et%20al.,%202019%20Retreat%20of%20glaciers%20control%20turbidity.pdf https://doi.org/10.1029/2018JF004970 en eng HAL CCSD American Geophysical Union/Wiley info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JF004970 hal-02363959 https://hal.science/hal-02363959 https://hal.science/hal-02363959/document https://hal.science/hal-02363959/file/Normandeau%20et%20al.,%202019%20Retreat%20of%20glaciers%20control%20turbidity.pdf doi:10.1029/2018JF004970 info:eu-repo/semantics/OpenAccess ISSN: 2169-9003 EISSN: 2169-9011 Journal of Geophysical Research: Earth Surface https://hal.science/hal-02363959 Journal of Geophysical Research: Earth Surface, 2019, 124 (6), pp.1559-1571. ⟨10.1029/2018JF004970⟩ [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy info:eu-repo/semantics/article Journal articles 2019 ftunivrennes1hal https://doi.org/10.1029/2018JF004970 2024-01-23T23:52:26Z International audience Glacier and ice sheet mass loss as a result of climate change is driving important coastal changes in Arctic fjords. Yet limited information exists for Arctic coasts regarding the influence of glacial erosion and ice mass loss on the occurrence and character of turbidity currents in fjords, which themselves affect delta dynamics. Here we show how glacial erosion and the production of meltwaters and sediments associated with the melting of retreating glaciers control the generation of turbidity currents in fjords of eastern Baffin Island (Canada). The subaqueous parts of 31 river mouths along eastern Baffin Island were mapped by high-resolution swath bathymetry in order to assess the presence or absence of sediment waves formed by turbidity currents on delta fronts. By extracting glaciological and hydrological watershed characteristics of these river mouths, we demonstrate that the presence and areal extent of glaciers are a key control for generating turbidity currents in fjords. However, lakes formed upstream during glacial retreat significantly alter the course of sediment routing to the deltas by forming temporary sinks, leading to the cessation of turbidity currents in the fjords. Due to the different deglaciation stages of watersheds in eastern Baffin Island, we put these results into a temporal framework of watershed deglaciation to demonstrate how the retreat pattern of glaciers, through the formation and filling of proglacial lakes, affects the turbidity current activity of deltas. Article in Journal/Newspaper Arctic Baffin Island Baffin Climate change glacier* Ice Sheet Université de Rennes 1: Publications scientifiques (HAL) Arctic Baffin Island Canada Journal of Geophysical Research: Earth Surface 124 6 1559 1571 |