著者
Tetsuya Takemi Takashi Unuma
出版者
Meteorological Society of Japan
雑誌
SOLA (ISSN:13496476)
巻号頁・発行日
pp.15A-011, (Released:2019-08-26)
被引用文献数
3

This study documented the environmental properties of precipitation systems that produced the July 2018 Heavy Rainfall event in Japan. The gridded analysis data were used to diagnose the potential for the development of convective systems in terms of thermodynamic environmental indices. Precipitable water vapor was extremely larger than that seen in the climatology of warm-season quasi-stationary convective clusters (QSCCs). Such an extreme moisture content was realized by very humid conditions at the middle-levels. In contrast, temperature lapse rate in a convectively unstable layer was not so significant in comparison to the QSCC climatology. Among the environmental indices, K Index was shown to describe the potential for the rainfall development. Based on the analysis, the roles of moisture content and profile on the convection development were discussed. It was suggested that the middle-level high humidity contributes to the occurrence of the present heavy rainfall by minimizing negative effects of environmental mixing and by decreasing vertical displacements to reach levels of free convection. In regions where heavy rainfall occurred, an automated algorithm detected the development of QSCCs, which were mostly categorized as a linear type.

言及状況

外部データベース (DOI)

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Moisture content during the Typhoon Hagibis landfall may be larger than that seen during the July 2018 Heavy Rainfall event in Japan. #SOLA Articles - Diagnosing Environmental Properties of the July 2018 Heavy Rainfall Event in Japan https://t.co/RKZHTN6OEU
J-STAGE Articles - Diagnosing Environmental Properties of the July 2018 Heavy Rainfall Event in Japan https://t.co/kapTXCKh3s←9/19'19J-waveのニュースで言ってました。
J-STAGE Articles - Diagnosing Environmental Properties of the July 2018 Heavy Rainfall Event in Japan https://t.co/RKZHTN6OEU
https://t.co/doOohD5xV1
Diagnosing Environmental Properties of the July 2018 Heavy Rainfall Event in Japan https://t.co/5WotL6WO4h EOR が出ました。平成30年7月豪雨の大気場の診断についての速報的な結果です。K index の有用性と大気中層の湿度の増加が豪雨の発生に寄与していることをそれぞれ示しました。

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