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Rapid discharge connects Antarctic subglacial lakes
Nature, 2006The existence of many subglacial lakes provides clear evidence for the widespread presence of water beneath the East Antarctic ice sheet, but the hydrology beneath this ice mass is poorly understood. Such knowledge is critical to understanding ice flow, basal water transfer to the ice margin, glacial landform development and subglacial lake habitats ...
Wingham, DJ +3 more
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Earth-Science Reviews, 2000
Abstract Antarctic subglacial lakes were first identified by Robin et al. (1970) after airborne radio-echo sounding (RES) investigations of the ice-sheet interior. Recently, satellite altimetry was used to measure anomalous near-flat regions on the ice-sheet surface that represent a manifestation of the subglacial lake beneath.
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Abstract Antarctic subglacial lakes were first identified by Robin et al. (1970) after airborne radio-echo sounding (RES) investigations of the ice-sheet interior. Recently, satellite altimetry was used to measure anomalous near-flat regions on the ice-sheet surface that represent a manifestation of the subglacial lake beneath.
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Cascades of subglacial lakes in Antarctica
Doklady Earth Sciences, 2012Progress in understanding cascades of subglacial lakes in Antarctica and in the dynamics of their surface was derived using satellite laser altimetry measurements ICESat. The morphological and dynamical signs indicate subglacial lakes and the positions of their shore lines. Oscillations of surfaces in transition zones are periodic, while the changes in
V. M. Kotlyakov +4 more
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Deep Clustering in Subglacial Reflections Reveals New Insight into Subglacial Lakes
2023Radar images imply subglacial features, including distinct reflections from ice bottom. Different from bedrock interfaces, subglacial lakes generally display smooth and continuous highlights as a special type of ice bottom reflectors in radar images. In this study, we construct a dataset of ice bottom reflectors based on CReSIS radar sounder dataset. A
Sheng Dong, Lei Fu
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Antarctic subglacial lake discharges
2011Antarctic subglacial lakes were long time supposed to be relatively closed and stable environments with long residence times and slow circulations. This view has recently been challenged with evidence of active subglacial lake discharge underneath the Antarctic ice sheet.
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Geomicrobiology of Subglacial Ice Above Lake Vostok, Antarctica
Science, 1999Data from ice 3590 meters below Vostok Station indicate that the ice was accreted from liquid water associated with Lake Vostok. Microbes were observed at concentrations ranging from 2.8 × 10 3 to 3.6 × 10 4 cells per milliliter; no biological incorporation of selected organic substrates or ...
J C, Priscu +11 more
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More Than 200 Meters of Lake Ice Above Subglacial Lake Vostok, Antarctica
Science, 1999Isotope studies show that the Vostok ice core consists of ice refrozen from Lake Vostok water, from 3539 meters below the surface of the Antarctic ice sheet to its bottom at about 3750 meters. Additional evidence comes from the total gas content, crystal size, and electrical conductivity of the ice.
Jouzel, J. +9 more
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The ice topography over subglacial lakes
Cold Regions Science and Technology, 1990Abstract A model is developed which relates the ice-surface topography above subglacial lakes to the length l of bed transition regions bordering the lake where the effect of the presence of the lake causes a reduction in basal shear stress. The model is applied to four representative regions of an ice sheet.
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Subglacial Lake McGregor, south-central Alberta, Canada
Sedimentary Geology, 2003Abstract It is proposed that a lake, here named “Subglacial Lake McGregor”, existed beneath the Laurentide Ice Sheet at, or near, the last glacial maximum. The lake resided in the ancient buried McGregor and Tee Pee preglacial valleys, which are now mostly filled with glacigenic deposits.
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Subglacial lakes and their changing role in a warming climate
Nature Reviews Earth & Environment, 2022Stephen J Livingstone +2 more
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