Delta-singular vortex dynamics on a rotating sphere and stability of coupled atmospheric centers of action

Details Delta-singular vortex dynamics on a rotating sphere and stability of coupled atmospheric centers of action Delta-singular vortex dynamics on a rotating sphere and stability of coupled atmospheric centers of action

2010-09-02

arxiv.org/abs/1009.0333v1

Physics

Fluid Dynamics

Scientific paper

Existence of a stationary mode for a Hamiltonian dynamic system of two point vortexes with different signs on different latitudes of a uniform rotating sphere complying with observed data is stated. It is shown that such mode realization is possible only in the case when the more intensive cyclonic vortex has greater latitude than that of the anticyclonic vortex. A criterion of exponential instability of the stationary vortex mode taken into account impact of the polar vortexes is obtained. Compliance of the theory to observed data and reanalysis for coupled quasi-stationary systems of cyclonic and anticyclonic atmosphere action centers above oceans in the Northern Hemisphere is considered.

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