一次弓状降雹回波区流场的反演
RETRIEVAL AND ANALYSIS OF AN ARCHSHAPED ECHO ZONE
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摘要: 通过对一次典型弓状降雹回波区的流场进行反演及特点分析,发现用矩不变量法反演出的回波区流场结构,与藤田关于弓状回波的概念模式非常吻合,利用该方法估测出的流场、散度场、涡度场所表现出的信息,与降雹实况是一致的。该研究可为中小尺度强天气的监测,提供高时空分辨率的流场资料。Abstract: In this paper,the stream field structure of arched hail hallout zone,evaluated by using moment invariant has been analysed.The result shows that the structure is approximately to the fujita model well.So,it′s a valuable method using moment invariant to quantitatively analyse the radar data.
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Key words:
- Hail storm /
- Arched echo /
- Flow field structure
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