The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions
The Scandinavian topography and bathymetry have been shaped by ice through numerous glacial cycles in the Quaternary. In this study, we investigate how the changing morphology has influenced the Scandinavian ice sheet (SIS) in return. We use a higher-order ice-sheet model to simulate the SIS through...
Published in: | The Cryosphere |
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2024
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Online Access: | https://pure.au.dk/portal/en/publications/dca7a25e-071b-4b38-b6be-cf48d78f45b9 https://doi.org/10.5194/tc-18-1517-2024 http://www.scopus.com/inward/record.url?scp=85190238077&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/dca7a25e-071b-4b38-b6be-cf48d78f45b9 2024-06-23T07:53:44+00:00 The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions Jungdal-Olesen, Gustav Andersen, Jane Lund Born, Andreas Pedersen, Vivi Kathrine 2024-04 https://pure.au.dk/portal/en/publications/dca7a25e-071b-4b38-b6be-cf48d78f45b9 https://doi.org/10.5194/tc-18-1517-2024 http://www.scopus.com/inward/record.url?scp=85190238077&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/dca7a25e-071b-4b38-b6be-cf48d78f45b9 info:eu-repo/semantics/openAccess Jungdal-Olesen , G , Andersen , J L , Born , A & Pedersen , V K 2024 , ' The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions ' , Cryosphere , vol. 18 , no. 4 , pp. 1517-1532 . https://doi.org/10.5194/tc-18-1517-2024 article 2024 ftuniaarhuspubl https://doi.org/10.5194/tc-18-1517-2024 2024-06-11T14:22:51Z The Scandinavian topography and bathymetry have been shaped by ice through numerous glacial cycles in the Quaternary. In this study, we investigate how the changing morphology has influenced the Scandinavian ice sheet (SIS) in return. We use a higher-order ice-sheet model to simulate the SIS through a glacial period on three different topographies, representing different stages of glacial landscape evolution in the Quaternary. By forcing the three experiments with the same climate conditions, we isolate the effects of a changing landscape morphology on the evolution and dynamics of the ice sheet. We find that early Quaternary glaciations in Scandinavia were limited in extent and volume by the pre-glacial bathymetry until glacial deposits filled depressions in the North Sea and built out the Norwegian shelf. From middle-late Quaternary (~0.5Ma) the bathymetry was sufficiently filled to allow for a faster southward expansion of the ice sheet causing a relative increase in ice-sheet volume and extent. Furthermore, we show that the formation of The Norwegian Channel during recent glacial periods restricted southward ice-sheet expansion, only allowing for the ice sheet to advance into the southern North Sea close to glacial maxima. Finally, our experiments indicate that different stretches of The Norwegian Channel may have formed in distinct stages during glacial periods since ~0.5Ma. These results highlight the importance of accounting for changes in landscape morphology through time when inferring ice-sheet history from ice-volume proxies and when interpreting climate variability from past ice-sheet extents. Article in Journal/Newspaper Ice Sheet Aarhus University: Research The Cryosphere 18 4 1517 1532 |
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Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
The Scandinavian topography and bathymetry have been shaped by ice through numerous glacial cycles in the Quaternary. In this study, we investigate how the changing morphology has influenced the Scandinavian ice sheet (SIS) in return. We use a higher-order ice-sheet model to simulate the SIS through a glacial period on three different topographies, representing different stages of glacial landscape evolution in the Quaternary. By forcing the three experiments with the same climate conditions, we isolate the effects of a changing landscape morphology on the evolution and dynamics of the ice sheet. We find that early Quaternary glaciations in Scandinavia were limited in extent and volume by the pre-glacial bathymetry until glacial deposits filled depressions in the North Sea and built out the Norwegian shelf. From middle-late Quaternary (~0.5Ma) the bathymetry was sufficiently filled to allow for a faster southward expansion of the ice sheet causing a relative increase in ice-sheet volume and extent. Furthermore, we show that the formation of The Norwegian Channel during recent glacial periods restricted southward ice-sheet expansion, only allowing for the ice sheet to advance into the southern North Sea close to glacial maxima. Finally, our experiments indicate that different stretches of The Norwegian Channel may have formed in distinct stages during glacial periods since ~0.5Ma. These results highlight the importance of accounting for changes in landscape morphology through time when inferring ice-sheet history from ice-volume proxies and when interpreting climate variability from past ice-sheet extents. |
format |
Article in Journal/Newspaper |
author |
Jungdal-Olesen, Gustav Andersen, Jane Lund Born, Andreas Pedersen, Vivi Kathrine |
spellingShingle |
Jungdal-Olesen, Gustav Andersen, Jane Lund Born, Andreas Pedersen, Vivi Kathrine The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions |
author_facet |
Jungdal-Olesen, Gustav Andersen, Jane Lund Born, Andreas Pedersen, Vivi Kathrine |
author_sort |
Jungdal-Olesen, Gustav |
title |
The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions |
title_short |
The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions |
title_full |
The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions |
title_fullStr |
The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions |
title_full_unstemmed |
The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions |
title_sort |
influence of glacial landscape evolution on scandinavian ice-sheet dynamics and dimensions |
publishDate |
2024 |
url |
https://pure.au.dk/portal/en/publications/dca7a25e-071b-4b38-b6be-cf48d78f45b9 https://doi.org/10.5194/tc-18-1517-2024 http://www.scopus.com/inward/record.url?scp=85190238077&partnerID=8YFLogxK |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Jungdal-Olesen , G , Andersen , J L , Born , A & Pedersen , V K 2024 , ' The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions ' , Cryosphere , vol. 18 , no. 4 , pp. 1517-1532 . https://doi.org/10.5194/tc-18-1517-2024 |
op_relation |
https://pure.au.dk/portal/en/publications/dca7a25e-071b-4b38-b6be-cf48d78f45b9 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-18-1517-2024 |
container_title |
The Cryosphere |
container_volume |
18 |
container_issue |
4 |
container_start_page |
1517 |
op_container_end_page |
1532 |
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1802645536402046976 |