The Development of disturbance on the atmospheric density stratification
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- KITANO Yoshikazu
- Division of Field Engineering for the Environment, Graduate School of Engineering Hokkaido University
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- YAMADA Tomohito J.
- Division of Field Engineering for the Environment, Graduate School of Engineering Hokkaido University
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- IZUMI Norihiro
- Division of Field Engineering for the Environment, Graduate School of Engineering Hokkaido University
Bibliographic Information
- Other Title
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- 大気密度成層における擾乱の発達過程
- タイキ ミツド セイソウ ニ オケル ジョウラン ノ ハッタツ カテイ
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Abstract
There are many unknown issues about line-shaped rainbands (LRBs) which is one of the meso-scale meteorological phenomena making torrential rainfall events in Japan. For disaster prevention, it is very important to reveal the formation mechanism of LRBs. In order to know the mechanism, the authors try to examine the instability of the density stratification. In this study, the rainfall and thermodynamic effects are not considered. To simplify the discussion, this theory considers only the up/down motion of the disturbance in the stratified atmosphere. Using this theory, the authors correlate the region of horizontal disturbance and the two parameters which characterize the shape of LRBs, i.e. the Froude number and the rate of density difference.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 68 (5), I_205-I_210, 2012
Japan Society of Civil Engineers
