Estimating the depth and shape of subglacial Lake Vostok's water cavity from aerogravity data
Michael Studinger; Robin E. Bell; Anahita A. Tikku
- Estimating the depth and shape of subglacial Lake Vostok's water cavity from aerogravity data
Bell, Robin E.
Tikku, Anahita A.
- Lamont-Doherty Earth Observatory
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- Geophysical Research Letters
- We use aerogravity data to estimate the water depth of subglacial Lake Vostok in East Antarctica. The inversion produces the first bathymetry map covering the entire lake. Lake Vostok consists of two subâ€basins separated by a ridge with very shallow water depths. The deeper southern subâ€basin is approximately double the spatial area of the smaller northern subâ€basin. The close correlation between the pattern of basal melting and freezing and the bathymetric structure has important ramifications for the water circulation and the sediment deposition. We estimate the lake volume to be 5400 Â± 1600 km3.
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