豪雨の「種」を捉えるための都市気象LESモデルの開発と積雲の生成に関する研究  [in Japanese] Basic Development of Urban Meteorological Model Based on LES for Investigation on Convection Genesis  [in Japanese]

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Abstract

局地的豪雨に対する予測として,レーダにより発見できる豪雨をもたらす積乱雲の最早段階を豪雨のタマゴと呼び,この早期発見が先行研究として行われてきた.その新たなステップとしてレーダでは捉えられない,タマゴの起源となる雲粒を伴わない水蒸気から雲の発生に至るプロセス,またそれを持ち上げる上昇流を豪雨の「種」と呼びその解明のための都市気象LESモデルを開発することを目的とする. 運動量,熱に加え水蒸気,雲水の飽和度を予報変数とするモデルにより都市を想定した数値実験を行い雲の発生時の渦構造について調べた.  <br>

Localized torrential rainfall disasters in Summer and Baiu season of Japan is called as “Guerrilla-heavy-rainfall” in Japanese media. This rainfall is produced by an isolated cumulonimbus that grew rapidly. To prevent this disasters, the approach to detection baby-cell of rainfall earlier by X-band radar has been performed. However, in order to enhance prediction of Guerrilla-heavy-rainfall, we have to analyze convection genesis of which is affected to a large degree by urban area, because it is concerned a large component of that generate baby-cell. We aim to clarify this convection genesis by development of urban meteorological model based on large-eddy simulation.  <br>

Journal

  • Proceeding of Annual Conference

    Proceeding of Annual Conference 28(0), 100012, 2015

    THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES

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