Rossby Wave Propagation and Nonlinear Effects in Zonally-Varying Basic Flows

DOI NDL Digital Collections Web Site Web Site 3 Citations 16 References Open Access

Bibliographic Information

Other Title
  • 東西非一様流におけるロスビー波の伝播と非線形効果
  • Rossby Wave Propagation and Nonlinear E

Search this article

Description

In this study, we examine the nonlinear effect in the evolution of the Rossby wave propagating in the jet stream using a nonlinear barotropic model. We focus primarily on the formation of isolated eddy from the Rossby wave. The Rossby wave is induced by localized vorticity forcing in a zonally-varying basic flow.<br>For weak, steady forcing we obtain the Rossby wavetrain trapped in the jet stream, as in the linear model. For strong, steady forcing it is occasionally seen that an isolated eddy with negative vorticity is formed from some domain in the Rossby wavetrain, when the zonal asymmetry of the basic flow is large. For strong forcing of a finite period, a strong isolated eddy with negative vorticity can be formed from some domain when the zonal asymmetry of basic flow is large. This eddy breaks down to finally emanate Rossby wave downward.

Journal

Citations (3)*help

See more

References(16)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top