高阶高通隐式滤波法及其应用

采用反射边界条件的高阶高能隐式滤波法可以有效地分离尺度，抑制边界上的虚假增幅现象，对于评价和诊断要素场极为有用。用１９９１年７月５日，６日１°×１°网格的客观分析资料，对隐式双高法试验。结果表明，分离后的中尺度系统达到预想的效果。选择合适的参数能分离出所要分离的，且中尺度系统结构清晰，风压场比较协调，可作为中尺度分析的一种有用工具。

A High-Order High-Pass Implicit Filter and Its Application

In this study,a high-order high-pass implicit filter,with reflective boundary conditions,is introduced.The sharpness of the filter response with much lower orders allows high qualitive filtering at the lateral boundary.This makes it superior to the traditional tilters.A case is tested in this paper.Under proper choice of orders and parameters,the outstanding results show that the filter not only does separate scales efficiently,but also matches different element fields well.The filter is a useful tool in eveluating meteorological fields.