【摘要】 本文运用带通滤波分析方法,对四川省1981年7月由西南低涡等天气系统引起的大暴雨过程作了地面气象要素场的中尺度诊断分析。结果表明,带通滤波后的场具有明显的中尺度特征,其中一些物理量场的适当配置与6小时后的暴雨中心有较好的对应关系。说明了此带通滤波方法在实际业务预报中具有一定的使用价值。更多还原

【Abstract】 The method of bandpass filtering is used to analyze the surface data of a Southwest Vortex process which brought heavy rain in Sichuan province in July, 1981. The results show that the filtered surface fields bear the obvious mesoscale features and the overlapping of some of them corresponds well to the center of heavy rain happening six hours later. It implies that the method of bandpass filtering is of value to the operational weather prediction.更多还原