Late Holocene ice-flow reconfiguration in the Weddell 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...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2013
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/19993/ https://nora.nerc.ac.uk/id/eprint/19993/1/1-s2.0-S0277379113003028-main.pdf |
id |
ftnerc:oai:nora.nerc.ac.uk:19993 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:19993 2023-05-15T13:45:12+02:00 Late Holocene ice-flow reconfiguration in the Weddell sector of West Antarctica Siegert, Martin Ross, Neil Corr, Hugh Kingslake, Jonathan Hindmarsh, Richard 2013-10-15 text http://nora.nerc.ac.uk/id/eprint/19993/ https://nora.nerc.ac.uk/id/eprint/19993/1/1-s2.0-S0277379113003028-main.pdf en eng https://nora.nerc.ac.uk/id/eprint/19993/1/1-s2.0-S0277379113003028-main.pdf Siegert, Martin; Ross, Neil; Corr, Hugh; Kingslake, Jonathan; Hindmarsh, Richard orcid:0000-0003-1633-2416 . 2013 Late Holocene ice-flow reconfiguration in the Weddell sector of West Antarctica. Quaternary Science Reviews, 78. 98-107. https://doi.org/10.1016/j.quascirev.2013.08.003 <https://doi.org/10.1016/j.quascirev.2013.08.003> cc_by CC-BY Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.1016/j.quascirev.2013.08.003 2023-02-04T19:32:39Z 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 Institute Ice Stream Weddell Sea West Antarctica Natural Environment Research Council: NERC Open Research Archive Weddell Sea West Antarctica Weddell Institute Ice Stream ENVELOPE(-75.000,-75.000,-82.000,-82.000) Quaternary Science Reviews 78 98 107 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Siegert, Martin Ross, Neil Corr, Hugh Kingslake, Jonathan Hindmarsh, Richard |
spellingShingle |
Siegert, Martin Ross, Neil Corr, Hugh Kingslake, Jonathan Hindmarsh, Richard Late Holocene ice-flow reconfiguration in the Weddell sector of West Antarctica |
author_facet |
Siegert, Martin Ross, Neil Corr, Hugh Kingslake, Jonathan Hindmarsh, Richard |
author_sort |
Siegert, Martin |
title |
Late Holocene ice-flow reconfiguration in the Weddell sector of West Antarctica |
title_short |
Late Holocene ice-flow reconfiguration in the Weddell sector of West Antarctica |
title_full |
Late Holocene ice-flow reconfiguration in the Weddell sector of West Antarctica |
title_fullStr |
Late Holocene ice-flow reconfiguration in the Weddell sector of West Antarctica |
title_full_unstemmed |
Late Holocene ice-flow reconfiguration in the Weddell sector of West Antarctica |
title_sort |
late holocene ice-flow reconfiguration in the weddell sector of west antarctica |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/19993/ https://nora.nerc.ac.uk/id/eprint/19993/1/1-s2.0-S0277379113003028-main.pdf |
long_lat |
ENVELOPE(-75.000,-75.000,-82.000,-82.000) |
geographic |
Weddell Sea West Antarctica Weddell Institute Ice Stream |
geographic_facet |
Weddell Sea West Antarctica Weddell Institute Ice Stream |
genre |
Antarc* Antarctica Ice Sheet Institute Ice Stream Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Institute Ice Stream Weddell Sea West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/19993/1/1-s2.0-S0277379113003028-main.pdf Siegert, Martin; Ross, Neil; Corr, Hugh; Kingslake, Jonathan; Hindmarsh, Richard orcid:0000-0003-1633-2416 . 2013 Late Holocene ice-flow reconfiguration in the Weddell sector of West Antarctica. Quaternary Science Reviews, 78. 98-107. https://doi.org/10.1016/j.quascirev.2013.08.003 <https://doi.org/10.1016/j.quascirev.2013.08.003> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
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 |
_version_ |
1766216921193119744 |