Dynamics of localized vortices on the beta plane |
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Authors: | G M Reznik |
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Institution: | (1) Center for Nonlinear Dynamics, Bharathidasan University, Tiruchirapalli, India; |
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Abstract: | This paper studies the joint influence that rotation and the earth’s sphericity have on the dynamics of localized synoptic
scale vortices within the quasi-geostrophic barotropic model in the beta-plane approximation. Rossby solitons (two-dimensional
vortices exponentially localized in space which propagate without changing their form along the latitude circles) are considered
in the first part of the article. The general properties of such solutions are discussed. The simplest examples are presented,
and a brief review of the main results is given. The second part is dedicated to the theory of nonstationary monopoles. The
physical mechanisms governing the evolution of such vortices are described; different stages of this evolution are determined
for intense vortices. Analytical and numerical results are used to confirm the qualitative explanations. |
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Keywords: | |
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