Influx of meltwater to subglacial Lake Concordia, East Antarctica
We present evidence for melting at the base of the ice that overlies Lake Concordia, an 800 km2 subglacial lake near Dome Concordia, East Antarctica, via a combination of glaciohydraulic melting (associated with the tilted ice ceiling and its influence on lake circulation/melting temperature) and me...
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International Glaciological Society
2005
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ftnerc:oai:nora.nerc.ac.uk:2023 2024-06-09T07:40:44+00:00 Influx of meltwater to subglacial Lake Concordia, East Antarctica Tikku, Anahita A. Bell, Robin E. Studinger, Michael Clarke, Garry K.C. Tabacco, Ignazio Ferraccioli, Fausto 2005 http://nora.nerc.ac.uk/id/eprint/2023/ unknown International Glaciological Society Tikku, Anahita A.; Bell, Robin E.; Studinger, Michael; Clarke, Garry K.C.; Tabacco, Ignazio; Ferraccioli, Fausto orcid:0000-0002-9347-4736 . 2005 Influx of meltwater to subglacial Lake Concordia, East Antarctica. Journal of Glaciology, 51 (172). 96-104. https://doi.org/10.3189/172756505781829494 <https://doi.org/10.3189/172756505781829494> Glaciology Publication - Article PeerReviewed 2005 ftnerc https://doi.org/10.3189/172756505781829494 2024-05-15T08:42:16Z We present evidence for melting at the base of the ice that overlies Lake Concordia, an 800 km2 subglacial lake near Dome Concordia, East Antarctica, via a combination of glaciohydraulic melting (associated with the tilted ice ceiling and its influence on lake circulation/melting temperature) and melting by extreme strain heating (where the ice sheet is grounded). An influx of water is necessary to provide nutrients, material and biota to support subglacial lake ecosystems but has not been detected previously. Freezing is the dominant observed basal process at over 60% of the surface area above the lake. The total volume of accreted ice above the lake surface is estimated as 50-60 km3, roughly 25-30% of the 200 ± 40 km3 estimated lake volume. Estimated rates of melting and freezing are very similar, ±2-6 mm a−1. The apparent net freezing may reflect the present-day response of Lake Concordia to cooling associated with the Last Glacial Maximum, or a large influx of water either via a subglacial hydrological system or from additional melting of the ice sheet. Lake Concordia is an excellent candidate for subglacial exploration given active basal processes, proximity to the Dome Concordia ice core and traverse resupply route. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal East Antarctica ice core Ice Sheet Journal of Glaciology Natural Environment Research Council: NERC Open Research Archive East Antarctica Journal of Glaciology 51 172 96 104 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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unknown |
topic |
Glaciology |
spellingShingle |
Glaciology Tikku, Anahita A. Bell, Robin E. Studinger, Michael Clarke, Garry K.C. Tabacco, Ignazio Ferraccioli, Fausto Influx of meltwater to subglacial Lake Concordia, East Antarctica |
topic_facet |
Glaciology |
description |
We present evidence for melting at the base of the ice that overlies Lake Concordia, an 800 km2 subglacial lake near Dome Concordia, East Antarctica, via a combination of glaciohydraulic melting (associated with the tilted ice ceiling and its influence on lake circulation/melting temperature) and melting by extreme strain heating (where the ice sheet is grounded). An influx of water is necessary to provide nutrients, material and biota to support subglacial lake ecosystems but has not been detected previously. Freezing is the dominant observed basal process at over 60% of the surface area above the lake. The total volume of accreted ice above the lake surface is estimated as 50-60 km3, roughly 25-30% of the 200 ± 40 km3 estimated lake volume. Estimated rates of melting and freezing are very similar, ±2-6 mm a−1. The apparent net freezing may reflect the present-day response of Lake Concordia to cooling associated with the Last Glacial Maximum, or a large influx of water either via a subglacial hydrological system or from additional melting of the ice sheet. Lake Concordia is an excellent candidate for subglacial exploration given active basal processes, proximity to the Dome Concordia ice core and traverse resupply route. |
format |
Article in Journal/Newspaper |
author |
Tikku, Anahita A. Bell, Robin E. Studinger, Michael Clarke, Garry K.C. Tabacco, Ignazio Ferraccioli, Fausto |
author_facet |
Tikku, Anahita A. Bell, Robin E. Studinger, Michael Clarke, Garry K.C. Tabacco, Ignazio Ferraccioli, Fausto |
author_sort |
Tikku, Anahita A. |
title |
Influx of meltwater to subglacial Lake Concordia, East Antarctica |
title_short |
Influx of meltwater to subglacial Lake Concordia, East Antarctica |
title_full |
Influx of meltwater to subglacial Lake Concordia, East Antarctica |
title_fullStr |
Influx of meltwater to subglacial Lake Concordia, East Antarctica |
title_full_unstemmed |
Influx of meltwater to subglacial Lake Concordia, East Antarctica |
title_sort |
influx of meltwater to subglacial lake concordia, east antarctica |
publisher |
International Glaciological Society |
publishDate |
2005 |
url |
http://nora.nerc.ac.uk/id/eprint/2023/ |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica Antarctica Journal East Antarctica ice core Ice Sheet Journal of Glaciology |
genre_facet |
Antarc* Antarctica Antarctica Journal East Antarctica ice core Ice Sheet Journal of Glaciology |
op_relation |
Tikku, Anahita A.; Bell, Robin E.; Studinger, Michael; Clarke, Garry K.C.; Tabacco, Ignazio; Ferraccioli, Fausto orcid:0000-0002-9347-4736 . 2005 Influx of meltwater to subglacial Lake Concordia, East Antarctica. Journal of Glaciology, 51 (172). 96-104. https://doi.org/10.3189/172756505781829494 <https://doi.org/10.3189/172756505781829494> |
op_doi |
https://doi.org/10.3189/172756505781829494 |
container_title |
Journal of Glaciology |
container_volume |
51 |
container_issue |
172 |
container_start_page |
96 |
op_container_end_page |
104 |
_version_ |
1801369133786333184 |