An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica
The subglacial landscape of Princess Elizabeth Land (PEL) in East Antarctica is poorly known due to a paucity of ice thickness measurements. This is problematic given its importance for understanding ice sheet dynamics and landscape and climate evolution. To address this issue, we describe the topog...
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ftunivtasecite:oai:ecite.utas.edu.au:110222 2023-05-15T14:03:26+02:00 An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica Jamieson, SSR Ross, N Greenbaum, JS Young, DA Aitken, ARA Roberts, JL Blankenship, DD Bo, S Siegert, MJ 2016 application/pdf https://doi.org/10.1130/G37220.1 http://ecite.utas.edu.au/110222 en eng Geological Soc America http://ecite.utas.edu.au/110222/1/Geology-2016-Jamieson-87-90.pdf http://dx.doi.org/10.1130/G37220.1 Jamieson, SSR and Ross, N and Greenbaum, JS and Young, DA and Aitken, ARA and Roberts, JL and Blankenship, DD and Bo, S and Siegert, MJ, An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica, Geology, 44, (2) pp. 87-90. ISSN 0091-7613 (2016) [Refereed Article] http://ecite.utas.edu.au/110222 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2016 ftunivtasecite https://doi.org/10.1130/G37220.1 2019-12-13T22:10:45Z The subglacial landscape of Princess Elizabeth Land (PEL) in East Antarctica is poorly known due to a paucity of ice thickness measurements. This is problematic given its importance for understanding ice sheet dynamics and landscape and climate evolution. To address this issue, we describe the topography beneath the ice sheet by assuming that ice surface expressions in satellite imagery relate to large-scale subglacial features. We find evidence that a large, previously undiscovered subglacial drainage network is hidden beneath the ice sheet in PEL. We interpret a discrete feature that is 140 20 km in plan form, and multiple narrow sinuous features that extend over a distance of ∼1100 km. We hypothesize that these are tectonically controlled and relate to a large subglacial basin containing a deep-water lake in the interior of PEL linked to a series of long, deep canyons. The presence of 1-km-deep canyons is confirmed at a few localities by radio-echo sounding data, and drainage analysis suggests that these canyons will direct subglacial meltwater to the coast between the Vestfold Hills and the West Ice Shelf. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Ice Sheet Ice Shelf Princess Elizabeth Land West Ice Shelf eCite UTAS (University of Tasmania) Deep Water Lake ENVELOPE(-134.436,-134.436,67.400,67.400) East Antarctica Princess Elizabeth Land ENVELOPE(80.367,80.367,-68.500,-68.500) Vestfold Vestfold Hills West Ice Shelf ENVELOPE(85.000,85.000,-67.000,-67.000) Geology 44 2 87 90 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Jamieson, SSR Ross, N Greenbaum, JS Young, DA Aitken, ARA Roberts, JL Blankenship, DD Bo, S Siegert, MJ An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
The subglacial landscape of Princess Elizabeth Land (PEL) in East Antarctica is poorly known due to a paucity of ice thickness measurements. This is problematic given its importance for understanding ice sheet dynamics and landscape and climate evolution. To address this issue, we describe the topography beneath the ice sheet by assuming that ice surface expressions in satellite imagery relate to large-scale subglacial features. We find evidence that a large, previously undiscovered subglacial drainage network is hidden beneath the ice sheet in PEL. We interpret a discrete feature that is 140 20 km in plan form, and multiple narrow sinuous features that extend over a distance of ∼1100 km. We hypothesize that these are tectonically controlled and relate to a large subglacial basin containing a deep-water lake in the interior of PEL linked to a series of long, deep canyons. The presence of 1-km-deep canyons is confirmed at a few localities by radio-echo sounding data, and drainage analysis suggests that these canyons will direct subglacial meltwater to the coast between the Vestfold Hills and the West Ice Shelf. |
format |
Article in Journal/Newspaper |
author |
Jamieson, SSR Ross, N Greenbaum, JS Young, DA Aitken, ARA Roberts, JL Blankenship, DD Bo, S Siegert, MJ |
author_facet |
Jamieson, SSR Ross, N Greenbaum, JS Young, DA Aitken, ARA Roberts, JL Blankenship, DD Bo, S Siegert, MJ |
author_sort |
Jamieson, SSR |
title |
An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica |
title_short |
An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica |
title_full |
An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica |
title_fullStr |
An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica |
title_full_unstemmed |
An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica |
title_sort |
extensive subglacial lake and canyon system in princess elizabeth land, east antarctica |
publisher |
Geological Soc America |
publishDate |
2016 |
url |
https://doi.org/10.1130/G37220.1 http://ecite.utas.edu.au/110222 |
long_lat |
ENVELOPE(-134.436,-134.436,67.400,67.400) ENVELOPE(80.367,80.367,-68.500,-68.500) ENVELOPE(85.000,85.000,-67.000,-67.000) |
geographic |
Deep Water Lake East Antarctica Princess Elizabeth Land Vestfold Vestfold Hills West Ice Shelf |
geographic_facet |
Deep Water Lake East Antarctica Princess Elizabeth Land Vestfold Vestfold Hills West Ice Shelf |
genre |
Antarc* Antarctica East Antarctica Ice Sheet Ice Shelf Princess Elizabeth Land West Ice Shelf |
genre_facet |
Antarc* Antarctica East Antarctica Ice Sheet Ice Shelf Princess Elizabeth Land West Ice Shelf |
op_relation |
http://ecite.utas.edu.au/110222/1/Geology-2016-Jamieson-87-90.pdf http://dx.doi.org/10.1130/G37220.1 Jamieson, SSR and Ross, N and Greenbaum, JS and Young, DA and Aitken, ARA and Roberts, JL and Blankenship, DD and Bo, S and Siegert, MJ, An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica, Geology, 44, (2) pp. 87-90. ISSN 0091-7613 (2016) [Refereed Article] http://ecite.utas.edu.au/110222 |
op_doi |
https://doi.org/10.1130/G37220.1 |
container_title |
Geology |
container_volume |
44 |
container_issue |
2 |
container_start_page |
87 |
op_container_end_page |
90 |
_version_ |
1766274094106411008 |