Results 131 to 140 of about 800 (174)
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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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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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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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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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A fourth inventory of Antarctic subglacial lakes
Antarctic Science, 2012AbstractAntarctic subglacial lakes are studied for three main scientific reasons. First, they form an important component of the basal hydrological system which is known to affect the dynamics of the ice sheet. Second, they are amongst the most extreme viable habitats on Earth and third, if sediments exist on their floors, they may contain high ...
Andrew Wright, Martin Siegert
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On the formation of large subglacial lakes
Canadian Journal of Earth Sciences, 1991The role of subglacial water storage beneath continental ice sheets is investigated, primarily for a deformable bed. Subglacial ponding is shown to occur under most regions of warm-based ice sheets, and large subglacial lakes can become established, for example in the Hudson Bay basin.
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The physiography of modern Antarctic subglacial lakes
Global and Planetary Change, 2003The size and distribution of Antarctic subglacial lakes have been investigated using airborne radio-echo sounding (RES) and satellite radar altimetry. Over 70 lakes have been identified beneath the ice sheet from distinctive, mirror-like reflectors observed on RES records.
Dowdeswell, JA, Siegert, MJ
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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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