Diagnosis of dynamic process over rainband of landfall typhoon

摘要: This paper introduces a new physical parameter — thermodynamic shear advection combining the perturbation vertical component of convective vorticity vector with coupling horizontal divergence and gradient general potential temperature perturbation. For heavy-rainfall event resulting from landfall typhoon 'Wipha', is calculated by using National Centres for Enviromental Prediction/National Centre Atmospheric Research global final analysis data. The results showed that corresponds to observed 6 h accumulative rainband since it capable catching hold dynamic disturbance in lower troposphere over rainband. Before landed, basic-state flow curl Coriolis force are primary processes which responsible local change parameter. After mainly driven combination five processes. was weakened after landed.