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

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

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3112401s&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 12, CiteID L12401

Physics

Geophysics

19

Geodesy And Gravity: Local Gravity Anomalies And Crustal Structure, Hydrology: Glaciology (1863), Marine Geology And Geophysics: Gravity, Mathematical Geophysics: Inverse Theory, Information Related To Geographic Region: Antarctica

Scientific paper

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.

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