五层原始方程模式套网格方案及初步试算结果

在上海台风研究所五层原始方程模式的基础上,本文设计了一个粗网格区域固定、细网格区域可变动的五层套网格方案,对交界域变量进行衔接,协调处理。实例计算表明,内区边界有较好的穿透性;细网格内区对气压系统的强度和形势预报均有所改善。

A NESTED MESH SCHEME FOR 5-LEVEL PRIMITIVE EQUATION MODEL AND THE PRELIMINARY NUMERICAL EXPERIMENTS

Based on the 5-level primitive equation model designed by Shanghai Typhoon Institute, in this paper a 5-level nested mesh scheme is presented, in which the coarse-mesh area is fixed and the fine-mesh area is changeable. Methods for conjunction and adjustment of dependent variables are used at the juncture of the coarse-mesh and the fine-mesh. It is shown from numerical experiments that there exists better penetrability at the boundary of the fine-mesh area, and the pattern and intensity of the predicted pressure systems in the inner fine-mesh area are improved.