Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica
The Recovery subglacial basin, with its largest glacier Recovery Glacier, has been identified as potentially the biggest contributor to future sea level rise from East Antarctica. Subglacial lakes along the main trunk have been detected from satellite data, with four giant lakes (Recovery Lakes A, B...
Published in: | Journal of Geophysical Research: Earth Surface |
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American Geophysical Union
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ftnerc:oai:nora.nerc.ac.uk:522069 2023-05-15T13:41:42+02:00 Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica Diez, Anja Matsuoka, Kenichi Jordan, Tom A. Kohler, Jack Ferraccioli, Fausto Corr, Hugh F. Olesen, Arne V. Forsberg, René Casal, Tania G. 2019-02 text http://nora.nerc.ac.uk/id/eprint/522069/ https://nora.nerc.ac.uk/id/eprint/522069/1/Diez_et_al-2019-Journal_of_Geophysical_Research__Earth_Surface.pdf https://doi.org/10.1029/2018JF004799 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/522069/1/Diez_et_al-2019-Journal_of_Geophysical_Research__Earth_Surface.pdf Diez, Anja; Matsuoka, Kenichi; Jordan, Tom A. orcid:0000-0003-2780-1986 Kohler, Jack; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Corr, Hugh F.; Olesen, Arne V.; Forsberg, René; Casal, Tania G. 2019 Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica. Journal of Geophysical Research: Earth Surface, 124 (2). 287-304. https://doi.org/10.1029/2018JF004799 <https://doi.org/10.1029/2018JF004799> Publication - Article PeerReviewed 2019 ftnerc https://doi.org/10.1029/2018JF004799 2023-02-04T19:47:38Z The Recovery subglacial basin, with its largest glacier Recovery Glacier, has been identified as potentially the biggest contributor to future sea level rise from East Antarctica. Subglacial lakes along the main trunk have been detected from satellite data, with four giant lakes (Recovery Lakes A, B, C and D) located at the onset of the fast ice flow (≥15 m/yr) and multiple smaller lakes along the glacier. The presence of subglacial water potentially plays a key role in the control of fast ice flow of Recovery Glacier. We present new insights on the Recovery Lakes from airborne radar data collected in 2013 and 2015. Using an adjusted classification scheme we show that a single large area consisting of smaller lakes connected by likely saturated sediment, referred to as Lake AB, exists in the originally proposed area of the Recovery Lakes A and B. We estimate that the current size of Lake AB is ∼4320 km2. Water likely leaks from the western shore of Lake AB lubricating the bed initiating fast ice flow at this location. The difference in the outlines of Lake AB and the Lakes A and B previously derived from surface features suggested that a larger paleo lake existed here in the past. From our data, we find Recovery Lake C to be dry; we attribute fast ice flow originating from this area to be due to a topographic step, and thus an increase in ice thickness rather than enhanced lubrication at the bed. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal East Antarctica Recovery Glacier Natural Environment Research Council: NERC Open Research Archive East Antarctica Recovery Glacier ENVELOPE(-25.500,-25.500,-81.166,-81.166) Journal of Geophysical Research: Earth Surface 124 2 287 304 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The Recovery subglacial basin, with its largest glacier Recovery Glacier, has been identified as potentially the biggest contributor to future sea level rise from East Antarctica. Subglacial lakes along the main trunk have been detected from satellite data, with four giant lakes (Recovery Lakes A, B, C and D) located at the onset of the fast ice flow (≥15 m/yr) and multiple smaller lakes along the glacier. The presence of subglacial water potentially plays a key role in the control of fast ice flow of Recovery Glacier. We present new insights on the Recovery Lakes from airborne radar data collected in 2013 and 2015. Using an adjusted classification scheme we show that a single large area consisting of smaller lakes connected by likely saturated sediment, referred to as Lake AB, exists in the originally proposed area of the Recovery Lakes A and B. We estimate that the current size of Lake AB is ∼4320 km2. Water likely leaks from the western shore of Lake AB lubricating the bed initiating fast ice flow at this location. The difference in the outlines of Lake AB and the Lakes A and B previously derived from surface features suggested that a larger paleo lake existed here in the past. From our data, we find Recovery Lake C to be dry; we attribute fast ice flow originating from this area to be due to a topographic step, and thus an increase in ice thickness rather than enhanced lubrication at the bed. |
format |
Article in Journal/Newspaper |
author |
Diez, Anja Matsuoka, Kenichi Jordan, Tom A. Kohler, Jack Ferraccioli, Fausto Corr, Hugh F. Olesen, Arne V. Forsberg, René Casal, Tania G. |
spellingShingle |
Diez, Anja Matsuoka, Kenichi Jordan, Tom A. Kohler, Jack Ferraccioli, Fausto Corr, Hugh F. Olesen, Arne V. Forsberg, René Casal, Tania G. Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica |
author_facet |
Diez, Anja Matsuoka, Kenichi Jordan, Tom A. Kohler, Jack Ferraccioli, Fausto Corr, Hugh F. Olesen, Arne V. Forsberg, René Casal, Tania G. |
author_sort |
Diez, Anja |
title |
Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica |
title_short |
Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica |
title_full |
Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica |
title_fullStr |
Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica |
title_full_unstemmed |
Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica |
title_sort |
patchy lakes and topographic origin for fast flow in the recovery glacier system, east antarctica |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
http://nora.nerc.ac.uk/id/eprint/522069/ https://nora.nerc.ac.uk/id/eprint/522069/1/Diez_et_al-2019-Journal_of_Geophysical_Research__Earth_Surface.pdf https://doi.org/10.1029/2018JF004799 |
long_lat |
ENVELOPE(-25.500,-25.500,-81.166,-81.166) |
geographic |
East Antarctica Recovery Glacier |
geographic_facet |
East Antarctica Recovery Glacier |
genre |
Antarc* Antarctica Antarctica Journal East Antarctica Recovery Glacier |
genre_facet |
Antarc* Antarctica Antarctica Journal East Antarctica Recovery Glacier |
op_relation |
https://nora.nerc.ac.uk/id/eprint/522069/1/Diez_et_al-2019-Journal_of_Geophysical_Research__Earth_Surface.pdf Diez, Anja; Matsuoka, Kenichi; Jordan, Tom A. orcid:0000-0003-2780-1986 Kohler, Jack; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Corr, Hugh F.; Olesen, Arne V.; Forsberg, René; Casal, Tania G. 2019 Patchy lakes and topographic origin for fast flow in the Recovery Glacier system, East Antarctica. Journal of Geophysical Research: Earth Surface, 124 (2). 287-304. https://doi.org/10.1029/2018JF004799 <https://doi.org/10.1029/2018JF004799> |
op_doi |
https://doi.org/10.1029/2018JF004799 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
124 |
container_issue |
2 |
container_start_page |
287 |
op_container_end_page |
304 |
_version_ |
1766154292492763136 |