Inertia gravity waves_vortex interaction in two_dimensional rotating fluid
旋转流体中的二维惯性重力波-涡相互作用

The interaction between inertia-gravity waves (IGWs) and the balance vortex in the two-dimensional f-plan shallow water fluid is investigated. When the IGWs propagate into the vortex, the two components did interact. The vortex could be deepening, and the wind structure of the vortex could become asymmetric. However, as the IGWs leaving the vortex, it recovers its initial structure while the initially north-south symmetric IGWs take on asymmetric structure. This feature is different from the one-dimensional case. The degree of wave-vortex interaction is not same in the whole vortex region. The distribution of the maximum variety of physical variables is almost consistent with the IGWs propagation direction. There are two regions in which the physical variables vary largest as the waves entering and leaving the vortex region. Besides the wave-vortex interaction is also related to the initial structure, strength and propagating direction of the IGWs and the characters of vortex. In the linear system the interaction is weaker, but the quality is similar to that in nonlinear system.