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

Michael Studinger; Robin E. Bell; Anahita A. Tikku

Title:
Estimating the depth and shape of subglacial Lake Vostok's water cavity from aerogravity data
Author(s):
Studinger, Michael
Bell, Robin E.
Tikku, Anahita A.
Date:
Type:
Articles
Department:
Lamont-Doherty Earth Observatory
Volume:
31
Book/Journal Title:
Geophysical Research Letters
Abstract:
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 km3.
Subject(s):
Hydrologic sciences
Marine geology
Geophysics
Publisher DOI:
http://dx.doi.org/10.1029/2004GL019801
Item views:
263
Metadata:
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