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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Water exchange between the subglacial Lake Vostok and the overlying ice sheet

Article Abstract:

It appears that rates of subglacial freezing on Lake Vostok, which is situated beneath the ice sheet on which is located Vostok Station in Antarctica, are higher than the rates of surface ice accumulation. An investigation of the ice-sheet structure from airborne 60-MHz radar studies suggests that distinct zones of basal ice loss and accretion arise at the ice-water interface. Basal melting and refreezing above Lake Vostok will boost lake water circulation, and there will also be a net transfer of impurities from the influent basal ice to the lake water.

Author: Siegert, Martin J., Kwok, Ron, Mayer, Christoph, Hubbard, Bryn
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
Research, Antarctic regions

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Large subglacial lakes in East Antarctica at the onset of fast-flowing ice streams

Article Abstract:

Satellite imagery and ice-surface elevations are used to identify a region of subglacial lakes at the onset region of the Recovery Glacier ice stream in East Antarctica. The results have shown that the subglacial lakes have initiated and maintained rapid ice flow through either active modification of the basal thermal regime of the ice sheet by lake accretion or through scouring bedrock channels in periodic drainage events.

Author: Bell, Robin E., Joughin, Ian, Studinger, Michael, Shuman, Christopher A., Fahnestock, Mark A.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2007
Observations

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Rapid discharge connects Antarctic subglacial lakes

Article Abstract:

Ice sheet surface elevation changes are presented in central East Antarctica that is interpreted to represent rapid discharge from a subglacial lake. Observations conflict with expectations that subglacial lakes have long residence times and slow circulations.

Author: Siegert, Martin J., Wingham, Duncan J., Shepherd, Andrew, Muir, Alan S.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006

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Subjects list: Environmental aspects, Ice sheets, Icing (Meteorology), Ice accretion, Antarctica, Glacial lakes
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