非绝热加热对热带气旋径向非均匀结构的影响

The influence of diabatic heating on tropical cyclone radial inhomogeneity structure

利用平面极坐标系下无摩擦有外源（非绝热加热）的正压无辐散方程，将热带气旋的物理量分解成环境场和扰动，进而求出了热带气旋扰动的行波解，并分析了风场（切向、径向）和重力位势扰动场的径向非均匀松紧结构．表明：这种松紧结构与热带气旋所在纬度的科氏参数（f）、热带气旋的强度（Ω）、热带气旋扰动的圆频率（ω）、热带气旋扰动在θ方向的角波数（m）有关，且不同要素的松紧结构不尽相同；同时还受非绝热加热（Q1）的影响，这种影响主要表现在使风场（切向、径向）呈内紧外松的非均匀分布．

Decomoposing the Tropical cyclone asymmetric disturbanc e into the supepeition of the symmetric environmental circulation, the travelling wave analytical soution is given by using the barotropical non-divergent model with diabatic heating forcing and non-friction in a plane polar coorinate. It is found that the radial inhomogeneity structure is innuenced by the Coriolis parameter (f), tropical cyclone intensity (n ), circular frequency (ω ) and angular wave number (m ) of tropical cyclone disturbance, and the diabatic heating (Q1 ) has significant impacts on the radial inhomogeneity structure of tropical cyclone wind (radial and tangential velocity).