Typhoons AMPIL and SHANSHAN (2024) Approaching the Kuroshio Current: Similarities in the Distribution of High Latent Heat Fluxes outside the Inner Core and Related Intensification Mechanisms

DOI Web Site 参考文献21件 オープンアクセス
  • Wada Akiyoshi
    Meteorological Research Institute, Japan Meteorological Agency

書誌事項

公開日
2025
資源種別
journal article
DOI
  • 10.2151/sola.2025-016
公開者
公益社団法人 日本気象学会

説明

<p>Typhoons AMPIL and SHANSHAN (2024) slowed down as they approached and moved parallel to the Kuroshio Current. Both typhoons reached peak intensity at relatively high latitudes while they were moving northward. Various atmospheric and oceanic datasets were used to investigate atmospheric and oceanic thermodynamic similarities and differences between AMPIL and SHANSHAN. In addition, numerical simulations and sensitivity experiments for high sea surface temperature (SST) in the Kuroshio Current region were performed with a nonhydrostatic atmosphere model and an atmosphere-wave-ocean coupled model to understand related intensification mechanism. The 26°C isotherm was relatively deep and the upper-ocean heat content was relatively high where AMPIL and SHANSHAN intensified. Despite the different atmospheric environments, such as the vertical wind shear and the relative humidity at the 600-hPa altitude, AMPIL and SHANSHAN were able to develop and maintain the maximum intensity at relatively high latitudes during when the TCs moved slowly near the Kuroshio Current region. The results of the sensitivity experiments suggest that high SSTs in the Kuroshio Current region possibly contribute to the development and maintenance of the maximum intensity of AMPIL and SHANSHAN through high latent heat fluxes outside the radius of maximum wind speed and the inner-core axisymmetrization.</p>

収録刊行物

  • SOLA

    SOLA 21 (0), 124-131, 2025

    公益社団法人 日本気象学会

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