A Dynamical Study of the Role of Surface Sensible Heating in the Structure and Intensification of the Tibetan Plateau Vortices
地面感热对青藏高原低涡流场结构及发展的作用

The vortices such as TCLV (Tropical Cyclone-Like Vortices) over the Tibetan Plateau are assumed to be axisymmetrical and thermal-wind balanced systems forced by diabatic heating and friction, and solved as an initial-value problem of linearized vortex equation set in cylindrical coordinates. The role of surface sensible heating in the structure and intensification of the Tibetan Plateau vortices is analyzed, the horizontal and vertical flow field of the vortex is drawn, and the relationship between growth of vortex and various parameters including horizontal and vertical scale of vortex, latitude of vortex source region, heat transfer coefficient and intensity of heating is discussed. The results show that the surface sensible heating plays an important role in the genesis and intensification of vortices; whether the role of surface sensible heating is beneficial to the development of vortex or not depends on the allocation of its flow field and heating field.