Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition
The stability of the West Antarctic Ice Sheet is threatened by the incursion of warm Circumpolar Deepwater which flows southwards via cross-shelf troughs towards the coast there melting ice shelves. However, the onset of this oceanic forcing on the development and evolution of the West Antarctic Ice...
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Springer Nature
2022
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Online Access: | https://epic.awi.de/id/eprint/55599/ https://doi.org/10.1038/s43247-022-00369-x https://hdl.handle.net/10013/epic.d08300a6-99f3-4637-b4c1-35cd64a78d6d |
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ftawi:oai:epic.awi.de:55599 2024-09-15T17:39:07+00:00 Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition Uenzelmann-Neben, Gabriele Gohl, Karsten Hochmuth, Katharina Salzmann, Ulrich Larter, Robert D. Hillenbrand, Claus-Dieter Klages, Johann Philipp 2022-02-21 https://epic.awi.de/id/eprint/55599/ https://doi.org/10.1038/s43247-022-00369-x https://hdl.handle.net/10013/epic.d08300a6-99f3-4637-b4c1-35cd64a78d6d unknown Springer Nature Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 , Gohl, K. orcid:0000-0002-9558-2116 , Hochmuth, K. orcid:0000-0003-2789-2179 , Salzmann, U. orcid:0000-0001-5598-5327 , Larter, R. D. , Hillenbrand, C. D. and Klages, J. P. orcid:0000-0003-0968-1183 , Science Team of Expedition PS104 (2022) Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition , Nature Communications Earth & Environment, 3 (1) . doi:10.1038/s43247-022-00369-x <https://doi.org/10.1038/s43247-022-00369-x> , hdl:10013/epic.d08300a6-99f3-4637-b4c1-35cd64a78d6d EPIC3Nature Communications Earth & Environment, Springer Nature, 3(1) Article isiRev 2022 ftawi https://doi.org/10.1038/s43247-022-00369-x 2024-06-24T04:27:29Z The stability of the West Antarctic Ice Sheet is threatened by the incursion of warm Circumpolar Deepwater which flows southwards via cross-shelf troughs towards the coast there melting ice shelves. However, the onset of this oceanic forcing on the development and evolution of the West Antarctic Ice Sheet remains poorly understood. Here, we use single- and multichannel seismic reflection profiles to investigate the architecture of a sediment body on the shelf of the Amundsen Sea Embayment. We estimate the formation age of this sediment body to be around the Eocene-Oligocene Transition and find that it possesses the geometry and depositional pattern of a plastered sediment drift. We suggest this indicates a southward inflow of deep water which probably supplied heat and, thus, prevented West Antarctic Ice Sheet advance beyond the coast at this time. We conclude that the West Antarctic Ice Sheet has likely experienced a strong oceanic influence on its dynamics since its initial formation. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelves Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Communications Earth & Environment 3 1 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The stability of the West Antarctic Ice Sheet is threatened by the incursion of warm Circumpolar Deepwater which flows southwards via cross-shelf troughs towards the coast there melting ice shelves. However, the onset of this oceanic forcing on the development and evolution of the West Antarctic Ice Sheet remains poorly understood. Here, we use single- and multichannel seismic reflection profiles to investigate the architecture of a sediment body on the shelf of the Amundsen Sea Embayment. We estimate the formation age of this sediment body to be around the Eocene-Oligocene Transition and find that it possesses the geometry and depositional pattern of a plastered sediment drift. We suggest this indicates a southward inflow of deep water which probably supplied heat and, thus, prevented West Antarctic Ice Sheet advance beyond the coast at this time. We conclude that the West Antarctic Ice Sheet has likely experienced a strong oceanic influence on its dynamics since its initial formation. |
format |
Article in Journal/Newspaper |
author |
Uenzelmann-Neben, Gabriele Gohl, Karsten Hochmuth, Katharina Salzmann, Ulrich Larter, Robert D. Hillenbrand, Claus-Dieter Klages, Johann Philipp |
spellingShingle |
Uenzelmann-Neben, Gabriele Gohl, Karsten Hochmuth, Katharina Salzmann, Ulrich Larter, Robert D. Hillenbrand, Claus-Dieter Klages, Johann Philipp Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
author_facet |
Uenzelmann-Neben, Gabriele Gohl, Karsten Hochmuth, Katharina Salzmann, Ulrich Larter, Robert D. Hillenbrand, Claus-Dieter Klages, Johann Philipp |
author_sort |
Uenzelmann-Neben, Gabriele |
title |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_short |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_full |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_fullStr |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_full_unstemmed |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_sort |
deep water inflow slowed offshore expansion of the west antarctic ice sheet at the eocene-oligocene transition |
publisher |
Springer Nature |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/55599/ https://doi.org/10.1038/s43247-022-00369-x https://hdl.handle.net/10013/epic.d08300a6-99f3-4637-b4c1-35cd64a78d6d |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelves |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelves |
op_source |
EPIC3Nature Communications Earth & Environment, Springer Nature, 3(1) |
op_relation |
Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 , Gohl, K. orcid:0000-0002-9558-2116 , Hochmuth, K. orcid:0000-0003-2789-2179 , Salzmann, U. orcid:0000-0001-5598-5327 , Larter, R. D. , Hillenbrand, C. D. and Klages, J. P. orcid:0000-0003-0968-1183 , Science Team of Expedition PS104 (2022) Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition , Nature Communications Earth & Environment, 3 (1) . doi:10.1038/s43247-022-00369-x <https://doi.org/10.1038/s43247-022-00369-x> , hdl:10013/epic.d08300a6-99f3-4637-b4c1-35cd64a78d6d |
op_doi |
https://doi.org/10.1038/s43247-022-00369-x |
container_title |
Communications Earth & Environment |
container_volume |
3 |
container_issue |
1 |
_version_ |
1810477670079660032 |