A Simple Model of the Resonant Interaction between Vortex Rossby and Gravity Waves

[摘要]  A simple conceptual model of the resonant interaction in a typhoon-like vortex between vortex Rossby waves (VRWs) and gravity waves (GWs) that are caused by the VRWs is presented. It is well-known that the VRWs in the central region of the vortex can grow by the interaction with the GWs in the outer region, but a simple conceptual model for their interaction has not yet been proposed. The proposed conceptual model is based on the buoyancy-vorticity formulation (BV-thinking), and is different from that for the barotropic and baroclinic instabilities based on PV interactions (PV-thinking).

[学科分类] 大气科学

[关键词] typhoon;vortex Rossby wave;gravity wave