COMPARISON OF STORM SURGES OF TYPHOON 1915 FOR VARIOUS METEOROLOGICAL MODELS

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  • IWAMOTO Takumu
    (国研)海上・港湾・航空技術研究所 港湾空港技術研究所 海洋情報・津波研究領域
  • KAWAI Hiroyasu
    (国研)海上・港湾・航空技術研究所 港湾空港技術研究所 海洋情報・津波研究領域

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  • 様々な気象モデルを用いた最大風速半径の小さな台風1915号による高潮推算値の比較検討

Abstract

<p> The radii of maximum wind (RMW) of Typhoons Faxii and Hagibis in 2019 were approximately half and twice, respectively, compared to the mean values of past typhoons according to an analysis referring to the typhoon bogus installation procedure developed by the Japan Meteorological Agency. In the case of Typhoon Faxii having a small RMW, the JMA’s GPV, MSM, gave higher sea level pressure within the radius and lower 10m wind speed near the radius. The downscaling of MSM with WRF improved the wind field alone significantly. The parametric typhoon model based on the mass balance on the moving coordinate with super gradient wind, ETM, could give the useful pressure and wind fields. The storm surge hindcast with ROMS concluded that the WRF and ETM meteorological fields gave better estimations than MSM. Contrarily, in the case of Typhoon Hagibis having a large RMW, the storm surge hindcast showed better results than the case of Typhoon Faxii even though MSM meteorological fields was given.</p>

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