Estimating the depth and shape of subglacial Lake Vostok's water cavity from aerogravity data

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 sub-basins separated by a ridge with very shallow water depths. The deeper southern sub-basin is app...

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Bibliographic Details
Main Authors: Studinger, Michael, Bell, Robin E., Tikku, Anahita A.
Format: Article in Journal/Newspaper
Language:English
Published: 2004
Subjects:
Hydrology
Submarine geology
Geophysics
East Antarctica
Lake Vostok
Antarc*
Antarctica
Online Access:https://doi.org/10.7916/D8086FVN
Description
Summary: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 sub-basins separated by a ridge with very shallow water depths. The deeper southern sub-basin is approximately double the spatial area of the smaller northern sub-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 ± 1600 km^3.

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