Role of the Vertical Structure of a Simulated Tropical Cyclone in Its Motion: A Case Study of Typhoon Fengshen (2008)

DOI Web Site 被引用文献9件 参考文献23件 オープンアクセス
  • Yamada Hiroyuki
    Faculty of Science, University of the Ryukyus
  • Nasuno Tomoe
    Japan Agency for Marine-Earth Science and Technology
  • Yanase Wataru
    Atmosphere and Ocean Research Institute, The University of Tokyo
  • Satoh Masaki
    Japan Agency for Marine-Earth Science and Technology Atmosphere and Ocean Research Institute, The University of Tokyo

書誌事項

公開日
2016
資源種別
journal article
DOI
  • 10.2151/sola.2016-041
公開者
公益社団法人 日本気象学会

説明

<p>Typhoon Fengshen (2008) was marked by a persistent track toward the northwest, which was poorly predicted by an operational hydrostatic model, which indicated a significant northward bias. Using a global nonhydrostatic model with finer grid spacing, we have simulated a reliable track of this typhoon. The purpose of this study is to clarify the causes of the northward bias by comparing the output of the two models. This typhoon was marked by the asymmetry of rainfall concentrating in the downshear side. While both models could reproduce the asymmetric structure, a significant difference between them was found in the vertical structure. In the hydrostatic model, the vortex tilted to the downshear side with a displacement from lower to upper levels exceeding 100 km. This tilt was related to weak updrafts of, at most, 0.5 m s−1. Diagnosis using vorticity budget demonstrated that the tilt of the vortex resulted from a lack of vertical coupling that was too weak to withstand differential advection between the lower and upper levels. These results suggest the importance of reproducing inner-core updrafts for better track prediction of a typhoon in an environment with strong vertical shear.</p>

収録刊行物

  • SOLA

    SOLA 12 (0), 203-208, 2016

    公益社団法人 日本気象学会

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参考文献 (23)*注記

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