A two-dimensional model for quasigeostrophic flow: Comparison with the two-dimensional Euler flow

PHYSICA D-NONLINEAR PHENOMENA

卷:98

Article

Majda, AJ ; Tabak, EG

关键词: geostrophic balance;    frontogenesis;    Euler equations;    Vortex stretching;    singular behavior;   

DOI  :  10.1016/0167-2789(96)00114-5

来源: Elsevier

【 摘 要 】

A simple two-dimensional model for quasigeostrophic flow is contrasted with the two-dimensional incompressible Euler equations. The model arises under the assumptions of fast rotation, uniform stratification and uniform potential vorticity. It is found that the more local feed-back of the quasigeostrophic model gives rise to strongly nonlinear front formation, as opposed to two-dimensional Euler, where the steepening process of mature fronts obeys a nonlocal, nearly Linear mechanism.

【 授权许可】

Free