Generation of tripolar vortical structures on the beta plane

J.S. Hesthaven; Jens-Peter Lynov; J. Juul Rasmussen; G.G. Sutyrin

doi:10.1063/1.858844

Generation of tripolar vortical structures on the beta plane

J.S. Hesthaven, Jens-Peter Lynov, J. Juul Rasmussen, G.G. Sutyrin

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Abstract

A new feature of the long-time evolution of a strong vortex with initially monotonic potential vorticity is found by direct numerical solution of the quasigeostrophic equivalent barotropic equation. Two satellites, which emerge after splitting of an annulus, appear at the vortex periphery. Rotation and oscillation of the tripolar structure may lead to increased mixing near the boundary of the vortex core. The translation of strong monopoles is found to be well described, even for times longer than the linear Rossby wave period, by a recent approximate theory for the evolution of an azimuthal perturbation with mode number l=1.

Original language	English
Journal	Physics of Fluids
Volume	A 5
Issue number	7
Pages (from-to)	1674-1678
ISSN	1070-6631
DOIs	https://doi.org/10.1063/1.858844
Publication status	Published - 1993

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title = "Generation of tripolar vortical structures on the beta plane",

abstract = "A new feature of the long-time evolution of a strong vortex with initially monotonic potential vorticity is found by direct numerical solution of the quasigeostrophic equivalent barotropic equation. Two satellites, which emerge after splitting of an annulus, appear at the vortex periphery. Rotation and oscillation of the tripolar structure may lead to increased mixing near the boundary of the vortex core. The translation of strong monopoles is found to be well described, even for times longer than the linear Rossby wave period, by a recent approximate theory for the evolution of an azimuthal perturbation with mode number l=1. ",

keywords = "Fremtidig energiteknologi",

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AU - Hesthaven, J.S.

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AU - Juul Rasmussen, J.

AU - Sutyrin, G.G.

PY - 1993

Y1 - 1993

N2 - A new feature of the long-time evolution of a strong vortex with initially monotonic potential vorticity is found by direct numerical solution of the quasigeostrophic equivalent barotropic equation. Two satellites, which emerge after splitting of an annulus, appear at the vortex periphery. Rotation and oscillation of the tripolar structure may lead to increased mixing near the boundary of the vortex core. The translation of strong monopoles is found to be well described, even for times longer than the linear Rossby wave period, by a recent approximate theory for the evolution of an azimuthal perturbation with mode number l=1.

AB - A new feature of the long-time evolution of a strong vortex with initially monotonic potential vorticity is found by direct numerical solution of the quasigeostrophic equivalent barotropic equation. Two satellites, which emerge after splitting of an annulus, appear at the vortex periphery. Rotation and oscillation of the tripolar structure may lead to increased mixing near the boundary of the vortex core. The translation of strong monopoles is found to be well described, even for times longer than the linear Rossby wave period, by a recent approximate theory for the evolution of an azimuthal perturbation with mode number l=1.

KW - Fremtidig energiteknologi

U2 - 10.1063/1.858844

DO - 10.1063/1.858844

M3 - Journal article

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VL - A 5

SP - 1674

EP - 1678

JO - Physics of Fluids

JF - Physics of Fluids

IS - 7

ER -

Generation of tripolar vortical structures on the beta plane

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