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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Geological Society of America
2016
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:17224 2023-05-15T13:59:22+02:00 An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica. Jamieson, S.S.R. Ross, N. Greenbaum, J.S. Young, D.A. Aitken, A.R.A. Roberts, J.L. Blankenship, D.D. Sun, B. Siegert, M.J. 2016-02-01 application/pdf http://dro.dur.ac.uk/17224/ http://dro.dur.ac.uk/17224/1/17224.pdf http://dro.dur.ac.uk/17224/2/17224P.pdf https://doi.org/10.1130/G37220.1 unknown Geological Society of America dro:17224 issn:0091-7613 issn: 1943-2682 doi:10.1130/G37220.1 http://dro.dur.ac.uk/17224/ http://dx.doi.org/10.1130/G37220.1 http://dro.dur.ac.uk/17224/1/17224.pdf http://dro.dur.ac.uk/17224/2/17224P.pdf © The Authors Gold Open Access: This paper is published under the terms of the CC-BY license. CC-BY Geology, 2016, Vol.44(2), pp.87-90 [Peer Reviewed Journal] Article PeerReviewed 2016 ftunivdurham https://doi.org/10.1130/G37220.1 2020-05-28T22:33:50Z 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 Durham University: Durham Research Online 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 |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
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, S.S.R. Ross, N. Greenbaum, J.S. Young, D.A. Aitken, A.R.A. Roberts, J.L. Blankenship, D.D. Sun, B. Siegert, M.J. |
spellingShingle |
Jamieson, S.S.R. Ross, N. Greenbaum, J.S. Young, D.A. Aitken, A.R.A. Roberts, J.L. Blankenship, D.D. Sun, B. Siegert, M.J. An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica. |
author_facet |
Jamieson, S.S.R. Ross, N. Greenbaum, J.S. Young, D.A. Aitken, A.R.A. Roberts, J.L. Blankenship, D.D. Sun, B. Siegert, M.J. |
author_sort |
Jamieson, S.S.R. |
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 Society of America |
publishDate |
2016 |
url |
http://dro.dur.ac.uk/17224/ http://dro.dur.ac.uk/17224/1/17224.pdf http://dro.dur.ac.uk/17224/2/17224P.pdf https://doi.org/10.1130/G37220.1 |
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_source |
Geology, 2016, Vol.44(2), pp.87-90 [Peer Reviewed Journal] |
op_relation |
dro:17224 issn:0091-7613 issn: 1943-2682 doi:10.1130/G37220.1 http://dro.dur.ac.uk/17224/ http://dx.doi.org/10.1130/G37220.1 http://dro.dur.ac.uk/17224/1/17224.pdf http://dro.dur.ac.uk/17224/2/17224P.pdf |
op_rights |
© The Authors Gold Open Access: This paper is published under the terms of the CC-BY license. |
op_rightsnorm |
CC-BY |
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_ |
1766267921339777024 |