Medium-scale Echo Clusters in the Baiu Front as Revealed by Multi-radar Composite Echo Maps

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Other Title
  • 広域合成レーダーエコー天気図によってみられる梅雨前線帯の中間規模エコークラスター
  • その I
  • Part I

Abstract

The characteristics of echo distribution in the Baiu Front are described by constructing multi-radar composite echo maps covering the western and central Japan Islands during three days period from July 03 to July 06, 1969. The purpose of this study is to describe the features of the echo distribution within an large area covering a whole wave-length of the wave cyclone along the Baiu Front.<br>It is shown that the echoes are organized into medium-scale echo clusters in the frontal zone. The spacing between these clusters is several hundereds km. The echo clusters which are located to the east of the synoptic-scale cyclone develop remarkably and are associated with heavy rainfalls. The surface analysis shows the isallobaric low and cyclonic wind circulation within the developed medium-scale echo clusters.

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