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.

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