著者

杉本 憲彦 ファン ミントゥン 橘 完太 吉川 大弘 古橋 武 水田 亮

出版者

日本流体力学会

雑誌

日本流体力学会年会講演論文集 (ISSN:13428004)

巻号頁・発行日

vol.2008, 2008-09-04

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We propose a high speed method to detect vortex using a streamline with enhanced curvature, which is useful to identify tropical cyclones in huge climatology data. In the proposed method, center of vortex is detected by iteration of streamline from some initial points automatically. This method has high accuracy and low computational cost, because it does not need to check empirical conditions at all grid points, contrary to the case of conventional method. We also extend the method to evaluate intensities and influential ranges of detected vortex. The accuracy of the method is checked using observational and climate model data. Results suggest that this method is applicable to risk-assessment of tropical cyclones under global warming simulated by high resolution models.