ANALYSIS OF THE TREND AND VARIATION FACTORS FOR THE RADIUS OF MAXIMUM WIND SPEED OF TYPHOONS MAKING LANDFALL IN JAPAN

DOI Web Site 10 References
  • MORO Yamato
    豊橋技術科学大学大学院工学研究科 建築・都市システム学専攻
  • TOYODA Masaya
    豊橋技術科学大学 建築・都市システム学系
  • KATO Shigeru
    豊橋技術科学大学 建築・都市システム学系
  • YOSHINO Jun
    岐阜大学 工学部社会基盤工学科

Bibliographic Information

Other Title
  • 日本に上陸する台風の最大風速半径の変化傾向とばらつき要因の解析

Abstract

<p> In existing storm surge inundation assumptions, the radius of maximum wind speed (Rw), the radius of maximum pressure gradient (Rp), and the radius ratio (Rp/Rw), which determines the scaling parameter (SP) is based on the values of historically significant cases. In this study, we investigated the spatial-temporal trends of Rw and Rp by analyzing the results of 49 cases of typhoons that made landfall in Japan. As a results, Rp tends to remain constant regardless of time, while Rw tends to fluctuate more than Rp. In addition, the radius ratio was around 1 at the peak time and 0.4-1.0 at landfall time. Therefore, the value of Rw varied with the lifetime of the typhoon. The two types of analysis (direction analysis / spatial analysis) of the factors contributing to the variability of Rw were conducted. It was revealed that the location of the maximum wind speed varies in various directions from the center of the typhoon. However, the magnitude of Rw does not vary. On the other hand, the location of maximum wind speed appears farther from the typhoon center as the typhoon structure collapses, and the direction also varies. Hence, spatial variability of wind field with typhoon structure collapse can attribute to uncertainty of Rw.</p>

Journal

References(10)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top