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Hypothesis for mega-outburst flooding from a palaeo-subglacial lake beneath the East Antarctic Ice Sheet.

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Title: Hypothesis for mega-outburst flooding from a palaeo-subglacial lake beneath the East Antarctic Ice Sheet.
Authors: Jordan, T. A.1 tomj@bas.ac.uk, Ferraccioli, F.1, Corr, H.1, Graham, A.1, Armadillo, E.2, Bozzo, E.2
Source: Terra Nova. Aug2010, Vol. 22 Issue 4, p283-289. 7p. 1 Diagram, 2 Graphs, 2 Maps.
Subjects: Aufeis, Ice caps, Paleogene stratigraphic geology
Geographic Terms: Antarctic Ocean, Laurentian Mountains (Québec), Québec (Province)
Abstract: Terra Nova, 22, 283–289, 2010 Subglacial outburst floods at the margins of the Antarctic and Laurentide Ice Sheets have been linked to changes in global ocean circulation and climate. The impact of palaeo-hydrological systems beneath the East Antarctic Ice Sheet (EAIS) has, however, remained elusive. By analysing bed morphology in the Wilkes Subglacial Basin, we hypothesise the occurrence of a major palaeo-subglacial lake and associated outburst floods in the interior of East Antarctica. At ∼70 km wide and over 100 km long, the inferred area of outburst flooding is the most extensive in Antarctica, and the palaeo-subglacial lake from which the floods originated is the second largest after Lake Vostok. The scale of inferred outburst flooding is similar to mega-floods beneath the Laurentide Ice Sheet. We suggest that this major hydrological system developed during expansion of the EAIS in the middle Miocene and probably affected ice sheet stability, ocean circulation and climate evolution. [ABSTRACT FROM AUTHOR]
Copyright of Terra Nova is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Hypothesis for mega-outburst flooding from a palaeo-subglacial lake beneath the East Antarctic Ice Sheet.
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  Data: <searchLink fieldCode="JN" term="%22Terra+Nova%22">Terra Nova</searchLink>. Aug2010, Vol. 22 Issue 4, p283-289. 7p. 1 Diagram, 2 Graphs, 2 Maps.
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  Data: <searchLink fieldCode="DE" term="%22Aufeis%22">Aufeis</searchLink><br /><searchLink fieldCode="DE" term="%22Ice+caps%22">Ice caps</searchLink><br /><searchLink fieldCode="DE" term="%22Paleogene+stratigraphic+geology%22">Paleogene stratigraphic geology</searchLink>
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  Data: Terra Nova, 22, 283–289, 2010 Subglacial outburst floods at the margins of the Antarctic and Laurentide Ice Sheets have been linked to changes in global ocean circulation and climate. The impact of palaeo-hydrological systems beneath the East Antarctic Ice Sheet (EAIS) has, however, remained elusive. By analysing bed morphology in the Wilkes Subglacial Basin, we hypothesise the occurrence of a major palaeo-subglacial lake and associated outburst floods in the interior of East Antarctica. At ∼70 km wide and over 100 km long, the inferred area of outburst flooding is the most extensive in Antarctica, and the palaeo-subglacial lake from which the floods originated is the second largest after Lake Vostok. The scale of inferred outburst flooding is similar to mega-floods beneath the Laurentide Ice Sheet. We suggest that this major hydrological system developed during expansion of the EAIS in the middle Miocene and probably affected ice sheet stability, ocean circulation and climate evolution. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Terra Nova is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/j.1365-3121.2010.00944.x
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      – Code: eng
        Text: English
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        StartPage: 283
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      – SubjectFull: Paleogene stratigraphic geology
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      – SubjectFull: Antarctic Ocean
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      – SubjectFull: Laurentian Mountains (Québec)
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      – SubjectFull: Québec (Province)
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              Text: Aug2010
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