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Detailed Reference Information |
Dietrich, R., Shibuya, K., Pötzsch, A. and Ozawa, T. (2001). Evidence for tides in the subglacial Lake Vostok, Antarctica. Geophysical Research Letters 28: doi: 10.1029/2001GL013230. issn: 0094-8276. |
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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 18 mm. To verify the hypothesis of really existing lake tides data from two different observational techniques are analyzed. 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. ¿ 2001 American Geophysical Union |
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Abstract |
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Keywords
Geodesy and Gravity, Geodesy and Gravity, Tides—Earth, Global Change, Remote sensing, Information Related to Geographic Region, Antarctica |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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