Assessing the subglacial lake coverage of Antarctica
Lakes beneath the Antarctic Ice Sheet are known to decrease traction at the ice base and therefore can have a great impact on ice dynamics. However, the total extent of Antarctic subglacial lakes is still unknown. We address this issue by combining modeling and remote-sensing strategies to predict p...
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ftawi:oai:epic.awi.de:41923 2024-09-15T17:40:00+00:00 Assessing the subglacial lake coverage of Antarctica Goeller, Sebastian Steinhage, Daniel Thoma, Malte Grosfeld, Klaus 2016-07-27 application/pdf https://epic.awi.de/id/eprint/41923/ https://epic.awi.de/id/eprint/41923/1/assessing-the-subglacial-lake-coverage-of-antarctica.pdf https://hdl.handle.net/10013/epic.48743 https://hdl.handle.net/10013/epic.48743.d001 unknown INT GLACIOL SOC https://epic.awi.de/id/eprint/41923/1/assessing-the-subglacial-lake-coverage-of-antarctica.pdf https://hdl.handle.net/10013/epic.48743.d001 Goeller, S. , Steinhage, D. orcid:0000-0003-4737-9751 , Thoma, M. orcid:0000-0002-4033-3905 and Grosfeld, K. orcid:0000-0001-5936-179X (2016) Assessing the subglacial lake coverage of Antarctica , Annals of Glaciology, 57 (72), pp. 109-117 . doi:10.1017/aog.2016.23 <https://doi.org/10.1017/aog.2016.23> , hdl:10013/epic.48743 EPIC3Annals of Glaciology, INT GLACIOL SOC, 57(72), pp. 109-117, ISSN: 0260-3055 Article isiRev 2016 ftawi https://doi.org/10.1017/aog.2016.23 2024-06-24T04:15:36Z Lakes beneath the Antarctic Ice Sheet are known to decrease traction at the ice base and therefore can have a great impact on ice dynamics. However, the total extent of Antarctic subglacial lakes is still unknown. We address this issue by combining modeling and remote-sensing strategies to predict potential lake locations using the general hydraulic potential equation. We are able to reproduce the majority of known lakes, as well as predict the existence of many new and so far undetected potential lakes. To validate our predictions, we analyzed ice-penetrating radar profiles from radio-echo sounding flights acquired over 1994–2013 in Dronning Maud Land, East Antarctica, and this led to the identification of 31 new subglacial lakes. Based on these findings, we estimate the total number of Antarctic subglacial lakes to be ~1300, a factor of three higher than the total number of lakes discovered to date. We estimate that only ~30% of all Antarctic subglacial lakes and ~65% of the total estimated lake-covered area have been discovered, and that lakes account for 0.6% of the Antarctic ice/bed interface. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Annals of Glaciology 57 72 109 117 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Lakes beneath the Antarctic Ice Sheet are known to decrease traction at the ice base and therefore can have a great impact on ice dynamics. However, the total extent of Antarctic subglacial lakes is still unknown. We address this issue by combining modeling and remote-sensing strategies to predict potential lake locations using the general hydraulic potential equation. We are able to reproduce the majority of known lakes, as well as predict the existence of many new and so far undetected potential lakes. To validate our predictions, we analyzed ice-penetrating radar profiles from radio-echo sounding flights acquired over 1994–2013 in Dronning Maud Land, East Antarctica, and this led to the identification of 31 new subglacial lakes. Based on these findings, we estimate the total number of Antarctic subglacial lakes to be ~1300, a factor of three higher than the total number of lakes discovered to date. We estimate that only ~30% of all Antarctic subglacial lakes and ~65% of the total estimated lake-covered area have been discovered, and that lakes account for 0.6% of the Antarctic ice/bed interface. |
format |
Article in Journal/Newspaper |
author |
Goeller, Sebastian Steinhage, Daniel Thoma, Malte Grosfeld, Klaus |
spellingShingle |
Goeller, Sebastian Steinhage, Daniel Thoma, Malte Grosfeld, Klaus Assessing the subglacial lake coverage of Antarctica |
author_facet |
Goeller, Sebastian Steinhage, Daniel Thoma, Malte Grosfeld, Klaus |
author_sort |
Goeller, Sebastian |
title |
Assessing the subglacial lake coverage of Antarctica |
title_short |
Assessing the subglacial lake coverage of Antarctica |
title_full |
Assessing the subglacial lake coverage of Antarctica |
title_fullStr |
Assessing the subglacial lake coverage of Antarctica |
title_full_unstemmed |
Assessing the subglacial lake coverage of Antarctica |
title_sort |
assessing the subglacial lake coverage of antarctica |
publisher |
INT GLACIOL SOC |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/41923/ https://epic.awi.de/id/eprint/41923/1/assessing-the-subglacial-lake-coverage-of-antarctica.pdf https://hdl.handle.net/10013/epic.48743 https://hdl.handle.net/10013/epic.48743.d001 |
genre |
Annals of Glaciology Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet |
op_source |
EPIC3Annals of Glaciology, INT GLACIOL SOC, 57(72), pp. 109-117, ISSN: 0260-3055 |
op_relation |
https://epic.awi.de/id/eprint/41923/1/assessing-the-subglacial-lake-coverage-of-antarctica.pdf https://hdl.handle.net/10013/epic.48743.d001 Goeller, S. , Steinhage, D. orcid:0000-0003-4737-9751 , Thoma, M. orcid:0000-0002-4033-3905 and Grosfeld, K. orcid:0000-0001-5936-179X (2016) Assessing the subglacial lake coverage of Antarctica , Annals of Glaciology, 57 (72), pp. 109-117 . doi:10.1017/aog.2016.23 <https://doi.org/10.1017/aog.2016.23> , hdl:10013/epic.48743 |
op_doi |
https://doi.org/10.1017/aog.2016.23 |
container_title |
Annals of Glaciology |
container_volume |
57 |
container_issue |
72 |
container_start_page |
109 |
op_container_end_page |
117 |
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1810483963539488768 |