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タイトル: | 台風Faxaiの上陸前の強度・構造変化 |
その他のタイトル: | Intensity and Structural Changes of numerically simulated Typhoon Faxai (1915) before landfall |
著者: | 宮本, 佳明 筆保, 弘徳 和田, 章義 |
著者名の別形: | MIYAMOTO, Yoshiaki FUDEYASU, Hironori WADA, Akiyoshi |
発行日: | Mar-2023 |
出版者: | 京都大学防災研究所 |
誌名: | 都市極端気象シンポジウム/台風研究会: 台風・豪雨など極端気象による都市の災害リスク評価に関する研究集会 |
論文番号: | 共同研究(一般研究集会)2022K-01 |
抄録: | A numerical simulation for Typhoon Faxai, which made landfall with the central pressure of 960 hPa in the Kanto region of Japan was conducted using a non-hydrostatic numerical model with a 1 km grid spacing. The simulation successfully simulated the realistic track and intensity of Faxai for 48 h around landfall. The simulated intensity was strong until the time of landfall and the spatial size of the vortex was small. The structure of the simulated Faxai, identified as having an axisymmetric flow field and eyewall, was similar to that of a well-developed tropical cyclone (TC) in the tropics. Around the TC center, the surface latent heat flux was over 300 W m⁻² until landfall, and the vertical wind shear was less than 9 m s⁻¹ between the 1.5 and 12.0 km altitudes, which is relatively weak at midlatitudes. The simulated and best track TC intensities exceeded the maximum potential intensity (MPI) for approximately 12 h before landfall. The present analyses suggest that the strong intensity of Faxai results from favorable environmental conditions and vortex structure. |
URI: | http://hdl.handle.net/2433/285623 |
関連リンク: | https://sites.google.com/view/toshikyokutan-2022 |
出現コレクション: | 台風・豪雨など極端気象による都市の災害リスク評価に関する研究集会 |
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