几种滤波器对地面飑线场的中尺度滤波试验

The mesoscale squall line experiment based on several-filters

本文用Barnes带通滤波法、二十五点格式滤波法和高阶高通隐式滤波法，对含有地面辐合线和飑线的地面加密观测资料和客观分析资料进行了中尺度滤波试验。结果表明，三种滤波器的作用结果都能有效突出地面辐合线和飑线的中尺度特征，其中Barnes法的性能和结果较理想，二十五点法和高阶高通法各有特点。

In this paper,based on dense observational data of squall line and its objective analysis data the Barnes filter,the twenty-five points filter,and the high-order high-pass implicit filter are used for mesoscale filtering experiment. It is found that all these filters can show mesoscale features of squall line and surface convergence line. A mong them the Barnes filter is favorable, the twenty-five points filter and the high-order highpass implicit filter are useful.