Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica
Subglacial water plays an important role in ice sheet dynamics and stability. Subglacial lakes are often located at the onset of ice streams and have been hypothesised to enhance ice flow downstream by lubricating the ice–bed interface. The most recent subglacial-lake inventory of Antarctica mapped...
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2020
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Online Access: | https://doi.org/10.5194/tc-14-4507-2020 https://doaj.org/article/a17ad00935334c5fb5c957f302b96460 |
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ftdoajarticles:oai:doaj.org/article:a17ad00935334c5fb5c957f302b96460 2023-05-15T13:54:03+02:00 Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica F. Napoleoni S. S. R. Jamieson N. Ross M. J. Bentley A. Rivera A. M. Smith M. J. Siegert G. J. G. Paxman G. Gacitúa J. A. Uribe R. Zamora A. M. Brisbourne D. G. Vaughan 2020-12-01T00:00:00Z https://doi.org/10.5194/tc-14-4507-2020 https://doaj.org/article/a17ad00935334c5fb5c957f302b96460 EN eng Copernicus Publications https://tc.copernicus.org/articles/14/4507/2020/tc-14-4507-2020.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-14-4507-2020 1994-0416 1994-0424 https://doaj.org/article/a17ad00935334c5fb5c957f302b96460 The Cryosphere, Vol 14, Pp 4507-4524 (2020) Environmental sciences GE1-350 Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.5194/tc-14-4507-2020 2022-12-31T13:39:16Z Subglacial water plays an important role in ice sheet dynamics and stability. Subglacial lakes are often located at the onset of ice streams and have been hypothesised to enhance ice flow downstream by lubricating the ice–bed interface. The most recent subglacial-lake inventory of Antarctica mapped nearly 400 lakes, of which ∼ 14 % are found in West Antarctica. Despite the potential importance of subglacial water for ice dynamics, there is a lack of detailed subglacial-water characterisation in West Antarctica. Using radio-echo sounding data, we analyse the ice–bed interface to detect subglacial lakes. We report 33 previously uncharted subglacial lakes and present a systematic analysis of their physical properties. This represents a ∼ 40 % increase in subglacial lakes in West Antarctica. Additionally, a new digital elevation model of basal topography of the Ellsworth Subglacial Highlands was built and used to create a hydropotential model to simulate the subglacial hydrological network. This allows us to characterise basal hydrology, determine subglacial water catchments and assess their connectivity. We show that the simulated subglacial hydrological catchments of the Rutford Ice Stream, Pine Island Glacier and Thwaites Glacier do not correspond to their ice surface catchments. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Pine Island Pine Island Glacier Rutford Ice Stream The Cryosphere Thwaites Glacier West Antarctica Directory of Open Access Journals: DOAJ Articles West Antarctica Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) Rutford Ice Stream ENVELOPE(-80.000,-80.000,-79.167,-79.167) Ellsworth Subglacial Highlands ENVELOPE(-94.000,-94.000,-80.500,-80.500) The Cryosphere 14 12 4507 4524 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 F. Napoleoni S. S. R. Jamieson N. Ross M. J. Bentley A. Rivera A. M. Smith M. J. Siegert G. J. G. Paxman G. Gacitúa J. A. Uribe R. Zamora A. M. Brisbourne D. G. Vaughan Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Subglacial water plays an important role in ice sheet dynamics and stability. Subglacial lakes are often located at the onset of ice streams and have been hypothesised to enhance ice flow downstream by lubricating the ice–bed interface. The most recent subglacial-lake inventory of Antarctica mapped nearly 400 lakes, of which ∼ 14 % are found in West Antarctica. Despite the potential importance of subglacial water for ice dynamics, there is a lack of detailed subglacial-water characterisation in West Antarctica. Using radio-echo sounding data, we analyse the ice–bed interface to detect subglacial lakes. We report 33 previously uncharted subglacial lakes and present a systematic analysis of their physical properties. This represents a ∼ 40 % increase in subglacial lakes in West Antarctica. Additionally, a new digital elevation model of basal topography of the Ellsworth Subglacial Highlands was built and used to create a hydropotential model to simulate the subglacial hydrological network. This allows us to characterise basal hydrology, determine subglacial water catchments and assess their connectivity. We show that the simulated subglacial hydrological catchments of the Rutford Ice Stream, Pine Island Glacier and Thwaites Glacier do not correspond to their ice surface catchments. |
format |
Article in Journal/Newspaper |
author |
F. Napoleoni S. S. R. Jamieson N. Ross M. J. Bentley A. Rivera A. M. Smith M. J. Siegert G. J. G. Paxman G. Gacitúa J. A. Uribe R. Zamora A. M. Brisbourne D. G. Vaughan |
author_facet |
F. Napoleoni S. S. R. Jamieson N. Ross M. J. Bentley A. Rivera A. M. Smith M. J. Siegert G. J. G. Paxman G. Gacitúa J. A. Uribe R. Zamora A. M. Brisbourne D. G. Vaughan |
author_sort |
F. Napoleoni |
title |
Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica |
title_short |
Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica |
title_full |
Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica |
title_fullStr |
Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica |
title_full_unstemmed |
Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica |
title_sort |
subglacial lakes and hydrology across the ellsworth subglacial highlands, west antarctica |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-4507-2020 https://doaj.org/article/a17ad00935334c5fb5c957f302b96460 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) ENVELOPE(-106.750,-106.750,-75.500,-75.500) ENVELOPE(-85.300,-85.300,-78.600,-78.600) ENVELOPE(-80.000,-80.000,-79.167,-79.167) ENVELOPE(-94.000,-94.000,-80.500,-80.500) |
geographic |
West Antarctica Pine Island Glacier Thwaites Glacier Rutford Rutford Ice Stream Ellsworth Subglacial Highlands |
geographic_facet |
West Antarctica Pine Island Glacier Thwaites Glacier Rutford Rutford Ice Stream Ellsworth Subglacial Highlands |
genre |
Antarc* Antarctica Ice Sheet Pine Island Pine Island Glacier Rutford Ice Stream The Cryosphere Thwaites Glacier West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Pine Island Pine Island Glacier Rutford Ice Stream The Cryosphere Thwaites Glacier West Antarctica |
op_source |
The Cryosphere, Vol 14, Pp 4507-4524 (2020) |
op_relation |
https://tc.copernicus.org/articles/14/4507/2020/tc-14-4507-2020.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-14-4507-2020 1994-0416 1994-0424 https://doaj.org/article/a17ad00935334c5fb5c957f302b96460 |
op_doi |
https://doi.org/10.5194/tc-14-4507-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
12 |
container_start_page |
4507 |
op_container_end_page |
4524 |
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1766259565083492352 |