Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica
Here we report Late Holocene ice sheet and grounding-line changes to the Weddell Sea sector of West Antarctica. Internal radio-echo layering within the Bungenstock Ice Rise, which comprises very slow-flowing ice separating the fast-flowing Institute and Möller ice streams, reveals ice deformed by fo...
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ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/72488 2023-05-15T14:02:50+02:00 Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica Siegert, M Ross, N Corr, H Kingslake, J Hindmarsh, R Natural Environment Research Council (NERC) Natural Environment Research Council (NERC) British Council (UK) 2013-08-09 http://hdl.handle.net/10044/1/72488 https://doi.org/10.1016/j.quascirev.2013.08.003 English eng Elsevier Quaternary Science Reviews © 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND 107 98 Science & Technology Physical Sciences Geography Physical Geosciences Multidisciplinary Physical Geography Geology Marine ice sheet Internal layers Ice rise Ice sheet stability GROUNDING-LINE RETREAT LAST GLACIAL MAXIMUM RONNE ICE STREAM-C SHEET RADAR SHELF STABILITY EMBAYMENT CONSTRAINTS 04 Earth Sciences 21 History and Archaeology Paleontology Journal Article 2013 ftimperialcol https://doi.org/10.1016/j.quascirev.2013.08.003 2019-08-15T22:37:31Z Here we report Late Holocene ice sheet and grounding-line changes to the Weddell Sea sector of West Antarctica. Internal radio-echo layering within the Bungenstock Ice Rise, which comprises very slow-flowing ice separating the fast-flowing Institute and Möller ice streams, reveals ice deformed by former enhanced flow, overlain by un-deformed ice. The ice-rise surface is traversed by surface lineations explicable as diffuse ice-flow generated stripes, which thus capture the direction of flow immediately prior to the creation of the ice rise. The arrangement of internal layers can be explained by adjustment to the flow path of the Institute Ice Stream, during either a phase of ice sheet retreat not longer than ∼4000 years ago or by wholesale expansion of the grounding-line from an already retreated situation not sooner than ∼400 years ago. Some combination of these events, involving uplift of the ice rise bed during ice stream retreat and reorganisation, is also possible. Whichever the case, the implication is that the ice sheet upstream of the Bungenstock Ice Rise, which currently grounds over a >1.5 km deep basin has been, and therefore may be, susceptible to significant change. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Ice Stream C Institute Ice Stream Weddell Sea West Antarctica Imperial College London: Spiral Institute Ice Stream ENVELOPE(-75.000,-75.000,-82.000,-82.000) Weddell Weddell Sea West Antarctica Quaternary Science Reviews 78 98 107 |
institution |
Open Polar |
collection |
Imperial College London: Spiral |
op_collection_id |
ftimperialcol |
language |
English |
topic |
Science & Technology Physical Sciences Geography Physical Geosciences Multidisciplinary Physical Geography Geology Marine ice sheet Internal layers Ice rise Ice sheet stability GROUNDING-LINE RETREAT LAST GLACIAL MAXIMUM RONNE ICE STREAM-C SHEET RADAR SHELF STABILITY EMBAYMENT CONSTRAINTS 04 Earth Sciences 21 History and Archaeology Paleontology |
spellingShingle |
Science & Technology Physical Sciences Geography Physical Geosciences Multidisciplinary Physical Geography Geology Marine ice sheet Internal layers Ice rise Ice sheet stability GROUNDING-LINE RETREAT LAST GLACIAL MAXIMUM RONNE ICE STREAM-C SHEET RADAR SHELF STABILITY EMBAYMENT CONSTRAINTS 04 Earth Sciences 21 History and Archaeology Paleontology Siegert, M Ross, N Corr, H Kingslake, J Hindmarsh, R Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica |
topic_facet |
Science & Technology Physical Sciences Geography Physical Geosciences Multidisciplinary Physical Geography Geology Marine ice sheet Internal layers Ice rise Ice sheet stability GROUNDING-LINE RETREAT LAST GLACIAL MAXIMUM RONNE ICE STREAM-C SHEET RADAR SHELF STABILITY EMBAYMENT CONSTRAINTS 04 Earth Sciences 21 History and Archaeology Paleontology |
description |
Here we report Late Holocene ice sheet and grounding-line changes to the Weddell Sea sector of West Antarctica. Internal radio-echo layering within the Bungenstock Ice Rise, which comprises very slow-flowing ice separating the fast-flowing Institute and Möller ice streams, reveals ice deformed by former enhanced flow, overlain by un-deformed ice. The ice-rise surface is traversed by surface lineations explicable as diffuse ice-flow generated stripes, which thus capture the direction of flow immediately prior to the creation of the ice rise. The arrangement of internal layers can be explained by adjustment to the flow path of the Institute Ice Stream, during either a phase of ice sheet retreat not longer than ∼4000 years ago or by wholesale expansion of the grounding-line from an already retreated situation not sooner than ∼400 years ago. Some combination of these events, involving uplift of the ice rise bed during ice stream retreat and reorganisation, is also possible. Whichever the case, the implication is that the ice sheet upstream of the Bungenstock Ice Rise, which currently grounds over a >1.5 km deep basin has been, and therefore may be, susceptible to significant change. |
author2 |
Natural Environment Research Council (NERC) Natural Environment Research Council (NERC) British Council (UK) |
format |
Article in Journal/Newspaper |
author |
Siegert, M Ross, N Corr, H Kingslake, J Hindmarsh, R |
author_facet |
Siegert, M Ross, N Corr, H Kingslake, J Hindmarsh, R |
author_sort |
Siegert, M |
title |
Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica |
title_short |
Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica |
title_full |
Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica |
title_fullStr |
Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica |
title_full_unstemmed |
Late Holocene ice-flow reconfiguration in the Weddell Sea sector of West Antarctica |
title_sort |
late holocene ice-flow reconfiguration in the weddell sea sector of west antarctica |
publisher |
Elsevier |
publishDate |
2013 |
url |
http://hdl.handle.net/10044/1/72488 https://doi.org/10.1016/j.quascirev.2013.08.003 |
long_lat |
ENVELOPE(-75.000,-75.000,-82.000,-82.000) |
geographic |
Institute Ice Stream Weddell Weddell Sea West Antarctica |
geographic_facet |
Institute Ice Stream Weddell Weddell Sea West Antarctica |
genre |
Antarc* Antarctica Ice Sheet Ice Stream C Institute Ice Stream Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Ice Stream C Institute Ice Stream Weddell Sea West Antarctica |
op_source |
107 98 |
op_relation |
Quaternary Science Reviews |
op_rights |
© 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.08.003 |
container_title |
Quaternary Science Reviews |
container_volume |
78 |
container_start_page |
98 |
op_container_end_page |
107 |
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1766273237979758592 |