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| Titel |
Dynamics of large-amplitude geostrophic flows over bottom topography |
| VerfasserIn |
E. S. Benilov, P. V. Sakov |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 4, no. 1 ; Nr. 4, no. 1, S.55-62 |
| Datensatznummer |
250001460
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| Publikation (Nr.) |
 copernicus.org/npg-4-55-1997.pdf |
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| Zusammenfassung |
| We examine the interaction of
near-surface and near-
bottom flows over bottom topography. A set of
asymptotic
equations for geostrophic currents in a three-layer
fluid is
derived. The depths of the active (top/bottom)
layers are
assumed small, the slope of the bottom is
weak, the
interfacial displacement is comparable to the depths
of the
thinner layers. Using the equations derived, we
examine the
stability of parallel flows and circular eddies.
It is
demonstrated that eddies with non-zero near-surface
component
are always unstable; eddies localized in the
near-bottom layer
may be stable subject to additional restrictions
imposed on
their horizontal profiles and bottom topography. |
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