有限区域模式侧边界对预报结果影响的试验研究

EFFECTS OF THE LATERAL BOUNDARY CONDITIONS OF THE LIMITED-AREA MODEL ON FORECASTING

摘要:

本文对固定侧边界、辐射侧边界及实测可变侧边界进行了对比, 发现采用实测可变侧边界后,形势预报有较明显的改进。因此,一旦机器条件许可,加入更好的侧边界处理方案或着手发展粗细网格嵌套的套网格模式,这样的想法是可取的。

Abstract:

In this study, several lateral boundary conditions, including fixed, radiational and time-dependent lateral boundary conditions, are tested. It is found that the results are greatly improved when the time-dependent lateral boundary conditions are used. Therefore, once the machine conditions permit, it is desirable to adopt a scheme for the better treatment of the lateral boundary conditions or set about developing a nested grid model with coarse and fine meshes.