ON MULTIPLE SOLUTIONS TO A LOW-SPECTRUM MODEL OF OCEANIC CURRENT DRIVEN BY THE BOUNDARY FORCE——THE BIMODALITY OF THE KUROSHIO SOUTH OF JAPAN

This low-spectrun medel study on the multiple solutions to a nonlinear quasi-geostrophic ocanic cur-rent equation shows that they depend on the combination of Ro, Re, λ and ε, that the bimedaity of theKuroshio depends strongly on the nonlinear effect represented by Ro and λ, and that its occurrenceprobability is reduced by the dissipation represented by Re and ε. The stability of solutions is discussed indetail with Hurwitz’s theory.

This low-spectrum model study on the multiple solutions to a nonlinear quasi-geostrophic oceanic current equation shows that they depend on the combination of Ro, Re, λ andε, that the bimodality of the Kuroshio depends strongly on the nonlinear effect represented by Ro and λ, and that its occurrence probability is reduced by the dissipation represented by Re and ε. The stability of solutions is discussed in detail with Hurwitz's theory.