台风数值模式中计算参数的确定

DETERMINATION OF COMPUTATION PARAMETERS IN NUMERICAL MODEL FOR TROPICAL CYCLONE

用简单的准地转正压涡度方程模式，通过比较与多组不同计算参数相对应的台风路径的相似程度，确定出合理的计算参数：即求解Ｐｏｉｓｓｏｎ方程的迭代精度可取为１．０×１０－４；时间积分步长可取为２０分钟。

By using a simple quasigeostrophic barotropical model in a beta plane framework,the analogues of tropical cyclones tracks according to several different computation parameters are compared,and the optimum computation parameters are determined.The time step for integration is given as 20 minutes,and the iterative precision for Poission equation is 1 0×10 -4 in the model conditions.