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- Title
Resonant Excitation of Baroclinic Waves in the Presence of Ekman Friction.
- Authors
Kalashnik, M. V.
- Abstract
The quasi-geostrophic dynamics of disturbances of a flow with a vertical shear is described by a transfer equation for potential vorticity. Wave solutions of this equation are represented by edge baroclinic waves (modes in a discrete spectrum) and singular modes in a continuous spectrum. When frequencies of these modes coincide, the effect of resonant excitation occurs in which the amplitude of baroclinic waves increases linearly. This paper studies this effect in the presence of Ekman bottom friction. It is shown that friction suppresses linear wave growth and gives rise to baroclinic waves of finite amplitude.
- Subjects
BAROCLINICITY; EKMAN motion theory; VORTEX motion; CONTINUOUS spectrum (Atomic spectrum); WAVE equation
- Publication
Izvestiya, Atmospheric & Oceanic Physics, 2018, Vol 54, Issue 2, p109
- ISSN
0001-4338
- Publication type
Article
- DOI
10.1134/S0001433818020111