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中文摘要: 本文选择了两种有代表性高空流型的华北飑线个例,应用带通滤波器成功地将实际流场分离成变化缓慢、比较稳定的大尺度环境场和有明显移动变化的中尺度扰动场。一般,在扰动场上出现几个中-α尺度(250-2500km)的扰动系统,其中有一两个扰动系统较深厚,并有规律地移动。它们的水平尺度比飑线系统大,生命史较长并先存在于扰动流场中,飑线就发生在某一扰动的一支较强的气流内。
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Abstract:The bandpass filter has been utilized to analysis two cases of squall line event in North China. The realistic wind field has been successfully seperated into a slowly variable, more stable macroscale environment field and an obviously movable meso-scale disturbances field. In general, there are several meso-a scale(250-2500km) disturbances emerged into the disturbances field, some of them is deep and moving steadily. The squall line systems occurred in a region of strong air flow associated with one of these disturbances, which is larger and formed earlier and persisted quite longer than the life cycle of the squall lines.
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| 作者 | 单位 |
| 蔡则怡 | 中国科学院大气物理所 |
| 于波 | 北京市气象科学研究所 |
| Author Name | Affiliation |
引用文本：
蔡则怡,于波,1988.带通滤波在华北飑线预报中的应用[J].气象,14(1):23-27.
,1988.Application of the bandpass filter for forecasting squall line in North China[J].Meteor Mon,14(1):23-27.
蔡则怡,于波,1988.带通滤波在华北飑线预报中的应用[J].气象,14(1):23-27.
,1988.Application of the bandpass filter for forecasting squall line in North China[J].Meteor Mon,14(1):23-27.