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Evidence for tides in the subglacial Lake Vostok, Antarctica
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Evidence for tides in the subglacial Lake Vostok, Antarctica

Author: R Dietrich Affiliation: Institut für Planetare Geodäsie, Technische Universitäit Dresden, Germany; K Shibuya Affiliation: Center for Antarctic Environment Monitoring, National Institute of Polar Research, Tokyo, Japan; A Pötzsch Affiliation: Institut für Planetare Geodäsie, Technische Universitäit Dresden, Germany; T Ozawa Affiliation: Center for Antarctic Environment Monitoring, National Institute of Polar Research, Tokyo, Japan; et al
Edition/Format: Article Article : English
Publication:Geophysical Research Letters, v28 n15 (1 August 2001): 2971-2974
Summary:
The phenomenon of lake tides is investigated for the subglacial Lake Vostok, East Antarctica. A model computation of equilibrium lake tides leads to a maximum lake level variation of about 18mm. To verify the hypothesis of really existing lake tides data from two different observational techniques are analysed. The re-evaluation of old tidal gravity data from Vostok Station as well as satellite synthetic aperture  Read more...
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Details

Document Type: Article
All Authors / Contributors: R Dietrich Affiliation: Institut für Planetare Geodäsie, Technische Universitäit Dresden, Germany; K Shibuya Affiliation: Center for Antarctic Environment Monitoring, National Institute of Polar Research, Tokyo, Japan; A Pötzsch Affiliation: Institut für Planetare Geodäsie, Technische Universitäit Dresden, Germany; T Ozawa Affiliation: Center for Antarctic Environment Monitoring, National Institute of Polar Research, Tokyo, Japan; et al
ISSN:0094-8276
Language Note: English
Unique Identifier: 5153922285
Awards:
Responsibility: Dietrich et al.

Abstract:

The phenomenon of lake tides is investigated for the subglacial Lake Vostok, East Antarctica. A model computation of equilibrium lake tides leads to a maximum lake level variation of about 18mm. To verify the hypothesis of really existing lake tides data from two different observational techniques are analysed. The re-evaluation of old tidal gravity data from Vostok Station as well as satellite synthetic aperture radar interferometry (InSAR) reveal specific signals which are explained as lake tides. The results of gravimetric tidal observations at Vostok Station from 1969 [Schneider, 1971; Schneider and Simon, 1974] show systematic deviations from the expected solid earth tide signal which correspond to a vertical tidal displacement of 12 and 2 mm amplitude for the waves K1 and M2, respectively. The InSAR data show the areal pattern of a vertical motion at the southern lake tip which is analogous to the grounding zone of ice shelves.

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Primary Entity

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