Atlantic inflow and low sea-ice cover in the Nordic Seas promoted Fennoscandian Ice Sheet growth during the Last Glacial Maximum
The Atlantic water inflow into the Nordic Seas has proven difficult to reconstruct for the Last Glacial Maximum. At that time, the Fennoscandian Ice Sheet grew potentially to its maximum extent. Sea-ice free conditions in the eastern Nordic Seas have been proposed as an essential moisture source con...
Published in: | Communications Earth & Environment |
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Online Access: | https://hdl.handle.net/11250/3102336 https://doi.org/10.1038/s43247-023-01032-9 |
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ftnorce:oai:norceresearch.brage.unit.no:11250/3102336 2023-12-10T09:48:33+01:00 Atlantic inflow and low sea-ice cover in the Nordic Seas promoted Fennoscandian Ice Sheet growth during the Last Glacial Maximum Simon, Margit Hildegard Rutledal, Sunniva Menviel, Laurie Zolles, Tobias Haflidason, Haflidi Born, Andreas Berben, Sarah Miche Patricia Dokken, Trond Martin 2023 application/pdf https://hdl.handle.net/11250/3102336 https://doi.org/10.1038/s43247-023-01032-9 eng eng Communications Earth & Environment. 2023, 4 (1), . urn:issn:2662-4435 https://hdl.handle.net/11250/3102336 https://doi.org/10.1038/s43247-023-01032-9 cristin:2193661 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © Author(s) 2023 Communications Earth & Environment 4 1 0 Peer reviewed Journal article 2023 ftnorce https://doi.org/10.1038/s43247-023-01032-9 2023-11-15T23:50:19Z The Atlantic water inflow into the Nordic Seas has proven difficult to reconstruct for the Last Glacial Maximum. At that time, the Fennoscandian Ice Sheet grew potentially to its maximum extent. Sea-ice free conditions in the eastern Nordic Seas have been proposed as an essential moisture source contributing to this build-up. It has been hypothesized that the inflow of warm and saline Atlantic surface waters was important for maintaining these seasonally sea-ice free conditions in the Nordic Seas at that time. However, the difference between a perennially frozen ocean and a seasonally open ocean on ice sheet build-up remains unquantified. Here we use, tephra-constrained surface ventilation ages from a network of marine sediment cores and model experiments, to show that Atlantic inflow to the southern Nordic Seas likely occurred predominately via the Iceland-Faroe Atlantic inflow pathway helping to maintain seasonal open waters at the onset of the Last Glacial Maximum. Using a numerical snow model, we further demonstrate that such open-ocean conditions may have been a factor contributing to the Fennoscandian Ice Sheet growth with up to ~150% increase in surface mass balance over Norwegian coastal areas, compared to sea-ice covered conditions. publishedVersion Article in Journal/Newspaper Fennoscandian Ice Sheet Iceland Nordic Seas Sea ice NORCE vitenarkiv (Norwegian Research Centre) Communications Earth & Environment 4 1 |
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NORCE vitenarkiv (Norwegian Research Centre) |
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English |
description |
The Atlantic water inflow into the Nordic Seas has proven difficult to reconstruct for the Last Glacial Maximum. At that time, the Fennoscandian Ice Sheet grew potentially to its maximum extent. Sea-ice free conditions in the eastern Nordic Seas have been proposed as an essential moisture source contributing to this build-up. It has been hypothesized that the inflow of warm and saline Atlantic surface waters was important for maintaining these seasonally sea-ice free conditions in the Nordic Seas at that time. However, the difference between a perennially frozen ocean and a seasonally open ocean on ice sheet build-up remains unquantified. Here we use, tephra-constrained surface ventilation ages from a network of marine sediment cores and model experiments, to show that Atlantic inflow to the southern Nordic Seas likely occurred predominately via the Iceland-Faroe Atlantic inflow pathway helping to maintain seasonal open waters at the onset of the Last Glacial Maximum. Using a numerical snow model, we further demonstrate that such open-ocean conditions may have been a factor contributing to the Fennoscandian Ice Sheet growth with up to ~150% increase in surface mass balance over Norwegian coastal areas, compared to sea-ice covered conditions. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Simon, Margit Hildegard Rutledal, Sunniva Menviel, Laurie Zolles, Tobias Haflidason, Haflidi Born, Andreas Berben, Sarah Miche Patricia Dokken, Trond Martin |
spellingShingle |
Simon, Margit Hildegard Rutledal, Sunniva Menviel, Laurie Zolles, Tobias Haflidason, Haflidi Born, Andreas Berben, Sarah Miche Patricia Dokken, Trond Martin Atlantic inflow and low sea-ice cover in the Nordic Seas promoted Fennoscandian Ice Sheet growth during the Last Glacial Maximum |
author_facet |
Simon, Margit Hildegard Rutledal, Sunniva Menviel, Laurie Zolles, Tobias Haflidason, Haflidi Born, Andreas Berben, Sarah Miche Patricia Dokken, Trond Martin |
author_sort |
Simon, Margit Hildegard |
title |
Atlantic inflow and low sea-ice cover in the Nordic Seas promoted Fennoscandian Ice Sheet growth during the Last Glacial Maximum |
title_short |
Atlantic inflow and low sea-ice cover in the Nordic Seas promoted Fennoscandian Ice Sheet growth during the Last Glacial Maximum |
title_full |
Atlantic inflow and low sea-ice cover in the Nordic Seas promoted Fennoscandian Ice Sheet growth during the Last Glacial Maximum |
title_fullStr |
Atlantic inflow and low sea-ice cover in the Nordic Seas promoted Fennoscandian Ice Sheet growth during the Last Glacial Maximum |
title_full_unstemmed |
Atlantic inflow and low sea-ice cover in the Nordic Seas promoted Fennoscandian Ice Sheet growth during the Last Glacial Maximum |
title_sort |
atlantic inflow and low sea-ice cover in the nordic seas promoted fennoscandian ice sheet growth during the last glacial maximum |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3102336 https://doi.org/10.1038/s43247-023-01032-9 |
genre |
Fennoscandian Ice Sheet Iceland Nordic Seas Sea ice |
genre_facet |
Fennoscandian Ice Sheet Iceland Nordic Seas Sea ice |
op_source |
Communications Earth & Environment 4 1 0 |
op_relation |
Communications Earth & Environment. 2023, 4 (1), . urn:issn:2662-4435 https://hdl.handle.net/11250/3102336 https://doi.org/10.1038/s43247-023-01032-9 cristin:2193661 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © Author(s) 2023 |
op_doi |
https://doi.org/10.1038/s43247-023-01032-9 |
container_title |
Communications Earth & Environment |
container_volume |
4 |
container_issue |
1 |
_version_ |
1784892622981038080 |