Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation
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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ftawi:oai:epic.awi.de:58166 2024-01-21T09:58:58+01:00 Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation Uenzelmann-Neben, Gabriele Gohl, Karsten 2023-12-12 application/vnd.openxmlformats-officedocument.wordprocessingml.document https://epic.awi.de/id/eprint/58166/ https://epic.awi.de/id/eprint/58166/1/Uenzelmann-Neben_Gohl_2023.docx https://hdl.handle.net/10013/epic.7ec020d9-951f-49f8-a842-261c5b273986 unknown https://epic.awi.de/id/eprint/58166/1/Uenzelmann-Neben_Gohl_2023.docx Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 and Gohl, K. (2023) Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation hdl:10013/epic.7ec020d9-951f-49f8-a842-261c5b273986 EPIC3 Conference NonPeerReviewed 2023 ftawi 2023-12-25T00:23:13Z 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. Seismic reflection profiles image sediment bodies in troughs on the shelf of the Amundsen Sea Embayment, which possess the geometry and depositional pattern of plastered sediment drifts. Tentative dating of one drift via a seabed drill core suggests a formation age of this sediment body to be around the Eocene-Oligocene. We suggest this indicates a southward inflow of deep water which probably supplied heat and, thus, prevented West Antarctic Ice Sheet advance. We conclude that the West Antarctic Ice Sheet has likely experienced a strong oceanic influence on its dynamics since its initial formation. Conference Object Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelves Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Amundsen Sea Antarctic West Antarctic Ice Sheet |
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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. Seismic reflection profiles image sediment bodies in troughs on the shelf of the Amundsen Sea Embayment, which possess the geometry and depositional pattern of plastered sediment drifts. Tentative dating of one drift via a seabed drill core suggests a formation age of this sediment body to be around the Eocene-Oligocene. We suggest this indicates a southward inflow of deep water which probably supplied heat and, thus, prevented West Antarctic Ice Sheet advance. We conclude that the West Antarctic Ice Sheet has likely experienced a strong oceanic influence on its dynamics since its initial formation. |
format |
Conference Object |
author |
Uenzelmann-Neben, Gabriele Gohl, Karsten |
spellingShingle |
Uenzelmann-Neben, Gabriele Gohl, Karsten Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation |
author_facet |
Uenzelmann-Neben, Gabriele Gohl, Karsten |
author_sort |
Uenzelmann-Neben, Gabriele |
title |
Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation |
title_short |
Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation |
title_full |
Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation |
title_fullStr |
Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation |
title_full_unstemmed |
Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation |
title_sort |
deep water incursions slow offshore west antarctic ice sheet expansion during its early formation |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/58166/ https://epic.awi.de/id/eprint/58166/1/Uenzelmann-Neben_Gohl_2023.docx https://hdl.handle.net/10013/epic.7ec020d9-951f-49f8-a842-261c5b273986 |
geographic |
Amundsen Sea Antarctic West Antarctic Ice Sheet |
geographic_facet |
Amundsen Sea Antarctic West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelves |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelves |
op_source |
EPIC3 |
op_relation |
https://epic.awi.de/id/eprint/58166/1/Uenzelmann-Neben_Gohl_2023.docx Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 and Gohl, K. (2023) Deep water incursions slow offshore West Antarctic Ice Sheet expansion during its early formation hdl:10013/epic.7ec020d9-951f-49f8-a842-261c5b273986 |
_version_ |
1788692292292313088 |