Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene
Major ice loss in the Amundsen Sea sector of the West Antarctic Ice Sheet (WAIS) is hypothesized to have triggered ice sheet collapses during past warm periods such as those in the Pliocene. International Ocean Discovery Program (IODP) Expedition 379 recovered continuous late Miocene to Holocene sed...
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American Geophysical Union
2021
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Online Access: | http://nora.nerc.ac.uk/id/eprint/530364/ https://nora.nerc.ac.uk/id/eprint/530364/1/2021GL093103.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL093103 |
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ftnerc:oai:nora.nerc.ac.uk:530364 2023-05-15T13:23:43+02:00 Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene Gohl, Karsten Uenzelmann-Neben, Gabriele Gille-Petzoldt, Johanna Hillenbrand, Claus-Dieter Klages, Johann P. Bohaty, Steven M. Passchier, Sandra Frederichs, Thomas Wellner, Julia S. Lamb, Rachel 379 Scientists, IODP Expedition 2021-07-28 text http://nora.nerc.ac.uk/id/eprint/530364/ https://nora.nerc.ac.uk/id/eprint/530364/1/2021GL093103.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL093103 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/530364/1/2021GL093103.pdf Gohl, Karsten; Uenzelmann-Neben, Gabriele; Gille-Petzoldt, Johanna; Hillenbrand, Claus-Dieter orcid:0000-0003-0240-7317 Klages, Johann P.; Bohaty, Steven M.; Passchier, Sandra; Frederichs, Thomas; Wellner, Julia S.; Lamb, Rachel; 379 Scientists, IODP Expedition. 2021 Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene. Geophysical Research Letters, 48 (14), e2021GL093103. 11, pp. https://doi.org/10.1029/2021GL093103 <https://doi.org/10.1029/2021GL093103> cc_by_4 CC-BY Publication - Article PeerReviewed 2021 ftnerc https://doi.org/10.1029/2021GL093103 2023-02-04T19:52:08Z Major ice loss in the Amundsen Sea sector of the West Antarctic Ice Sheet (WAIS) is hypothesized to have triggered ice sheet collapses during past warm periods such as those in the Pliocene. International Ocean Discovery Program (IODP) Expedition 379 recovered continuous late Miocene to Holocene sediments from a sediment drift on the continental rise, allowing assessment of sedimentation processes in response to climate cycles and trends since the late Miocene. Via seismic correlation to the shelf, we interpret massive prograding sequences that extended the outer shelf by 80 km during the Pliocene through frequent advances of grounded ice. Buried grounding zone wedges indicate prolonged periods of ice-sheet retreat, or even collapse, during an extended mid-Pliocene warm period from ∼4.2‒3.2 Ma inferred from Expedition 379 records. These results indicate that the WAIS was highly dynamic during the Pliocene and major retreat events may have occurred along the Amundsen Sea margin. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Ice Sheet Natural Environment Research Council: NERC Open Research Archive Amundsen Sea Antarctic West Antarctic Ice Sheet Geophysical Research Letters 48 14 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Major ice loss in the Amundsen Sea sector of the West Antarctic Ice Sheet (WAIS) is hypothesized to have triggered ice sheet collapses during past warm periods such as those in the Pliocene. International Ocean Discovery Program (IODP) Expedition 379 recovered continuous late Miocene to Holocene sediments from a sediment drift on the continental rise, allowing assessment of sedimentation processes in response to climate cycles and trends since the late Miocene. Via seismic correlation to the shelf, we interpret massive prograding sequences that extended the outer shelf by 80 km during the Pliocene through frequent advances of grounded ice. Buried grounding zone wedges indicate prolonged periods of ice-sheet retreat, or even collapse, during an extended mid-Pliocene warm period from ∼4.2‒3.2 Ma inferred from Expedition 379 records. These results indicate that the WAIS was highly dynamic during the Pliocene and major retreat events may have occurred along the Amundsen Sea margin. |
format |
Article in Journal/Newspaper |
author |
Gohl, Karsten Uenzelmann-Neben, Gabriele Gille-Petzoldt, Johanna Hillenbrand, Claus-Dieter Klages, Johann P. Bohaty, Steven M. Passchier, Sandra Frederichs, Thomas Wellner, Julia S. Lamb, Rachel 379 Scientists, IODP Expedition |
spellingShingle |
Gohl, Karsten Uenzelmann-Neben, Gabriele Gille-Petzoldt, Johanna Hillenbrand, Claus-Dieter Klages, Johann P. Bohaty, Steven M. Passchier, Sandra Frederichs, Thomas Wellner, Julia S. Lamb, Rachel 379 Scientists, IODP Expedition Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene |
author_facet |
Gohl, Karsten Uenzelmann-Neben, Gabriele Gille-Petzoldt, Johanna Hillenbrand, Claus-Dieter Klages, Johann P. Bohaty, Steven M. Passchier, Sandra Frederichs, Thomas Wellner, Julia S. Lamb, Rachel 379 Scientists, IODP Expedition |
author_sort |
Gohl, Karsten |
title |
Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene |
title_short |
Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene |
title_full |
Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene |
title_fullStr |
Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene |
title_full_unstemmed |
Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene |
title_sort |
evidence for a highly dynamic west antarctic ice sheet during the pliocene |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
http://nora.nerc.ac.uk/id/eprint/530364/ https://nora.nerc.ac.uk/id/eprint/530364/1/2021GL093103.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL093103 |
geographic |
Amundsen Sea Antarctic West Antarctic Ice Sheet |
geographic_facet |
Amundsen Sea Antarctic West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet |
op_relation |
https://nora.nerc.ac.uk/id/eprint/530364/1/2021GL093103.pdf Gohl, Karsten; Uenzelmann-Neben, Gabriele; Gille-Petzoldt, Johanna; Hillenbrand, Claus-Dieter orcid:0000-0003-0240-7317 Klages, Johann P.; Bohaty, Steven M.; Passchier, Sandra; Frederichs, Thomas; Wellner, Julia S.; Lamb, Rachel; 379 Scientists, IODP Expedition. 2021 Evidence for a highly dynamic West Antarctic Ice Sheet during the Pliocene. Geophysical Research Letters, 48 (14), e2021GL093103. 11, pp. https://doi.org/10.1029/2021GL093103 <https://doi.org/10.1029/2021GL093103> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2021GL093103 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
14 |
_version_ |
1766374372036050944 |