Radar Echo Intensities Below Bright Band

Bh V. Ramana Murty Rain and Cloud Physics Research Centre, National Physical Laboratory, New Delhi, India

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A. K. Roy Rain and Cloud Physics Research Centre, National Physical Laboratory, New Delhi, India

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K. R. Biswas Rain and Cloud Physics Research Centre, National Physical Laboratory, New Delhi, India

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Abstract

The study of echo intensity profile below bright band, when this appears on radar in certain rain situations, has shown that raindrops, after leaving melting level and falling through clouds in warmer layers below do not, as a rule, undergo any noticeable increase in their sizes, suggesting that lower level clouds at this stage have little or no significant liquid water content. The implications of this on the life cycle of rain situations associated with development of bright band are discussed, with reference to a few instances of study, using radar, of such rain at Delhi.

Abstract

The study of echo intensity profile below bright band, when this appears on radar in certain rain situations, has shown that raindrops, after leaving melting level and falling through clouds in warmer layers below do not, as a rule, undergo any noticeable increase in their sizes, suggesting that lower level clouds at this stage have little or no significant liquid water content. The implications of this on the life cycle of rain situations associated with development of bright band are discussed, with reference to a few instances of study, using radar, of such rain at Delhi.

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