利用一个非静力、原始方程热带气旋模式(TCM4),通过对f平面不同强度的垂直风切变下理想热带气旋的模拟后发现:29.15℃的海温下理想热带气旋最大可能强度(MPI)接近910hPa,近中心最大风力可达到76m·s^-1左右。在理想条件下,能抑制热带气旋强度甚至减弱的垂直风切变临界值在8-10m·s^-4由于切变造成涡度平流随高度变化,使得在顺切变前部以及左侧边界层附近产生辐合,伴随着空气的气旋式螺旋上升,外流层对应区域产生辐散,从而使得强对流和强降水发生在顺切变左侧。
Using a nonhydrostatic, primitive equation model of tropical cyclones (TCM4), the simulations of different vertical wind shear intensities of an ideal tropical cyclones on f-plane were conducted.The results shows that the maximum potential intensity (MPI) of the ideal tropical cyclone could reach 910hPa and near center's winds could reach 76 m·s^-1 around if the sea temperature was 29.15℃. Under the ideal conditions, the 8-10m·s^-1 vertical wind shear may restrain or weaken the tropical cyclone's intensity.Apart from that, the vorticity advection were changed with height caused by vertical shear, which in turn produced low-level convergence ahead of and to the left of the shear vector, with the air rising in a cyclonic spiral. Corresponding to this, there is a divergence region in outflow layer, producing convection and rain on the left of downshear.