Laboratory model of the Obukhov geostrophic vortex
The results of laboratory modeling of geostrophic adjustment in a shallow-water layer in rotating paraboloid are presented. According to the Rossby-Obukhov theory, this process excites nonstationary wave and stationary vortex (geostrophic) components of motion in a rotating fluid. In our experiments...
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| Veröffentlicht in: | Izvestiya. Atmospheric and oceanic physics 2009-08, Vol.45 (4), p.403-410 |
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| container_title | Izvestiya. Atmospheric and oceanic physics |
| container_volume | 45 |
| creator | Kakhiani, V. O. Patarashvili, K. I. Tsakadze, S. D. Kalashnik, M. V. Ingel, L. Kh |
| description | The results of laboratory modeling of geostrophic adjustment in a shallow-water layer in rotating paraboloid are presented. According to the Rossby-Obukhov theory, this process excites nonstationary wave and stationary vortex (geostrophic) components of motion in a rotating fluid. In our experiments, the wave and vortex components were excited by extracting a preliminarily imbedded hemisphere (which made the initial distribution of the depth of the fluid inhomogeneous) from the central area of a rotating vessel with a parabolic base. Under this excitation technique, a prominent cyclonic eddy is formed in the central portion; the structure of this eddy is satisfactorily described within the linear theory of adjustment. Along with the shallow-water experiments, the published experimental data on modeling geostrophic adjustment in a two-layer medium are analyzed. A simple analytic solution to the corresponding problem of the adjustment theory is obtained, and this solution agrees with the experiment. |
| doi_str_mv | 10.1134/S000143380904001X |
| format | Article |
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| subjects | Climatology Earth and Environmental Science Earth Sciences Fluid dynamics Geophysics Geophysics/Geodesy Marine Shallow water Theory |
| title | Laboratory model of the Obukhov geostrophic vortex |
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