近接台風FengshenとFung-Wongの相互作用

概要

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A rotating track was observed for Typhoon Fung-Wong (T0211) during its passage around the Okinawa Islands on 24-26 July 2002. We analyzed this phenomenon by using satellite data and surface meteorological data from the viewpoint of its interaction with Typhoon Fengshen (T0209). This mutual interaction, appeared as cyclonic orbit influenced by the other typhoon, occurred when the center of two typhoons approached within around 1000km. Assuming that these binary typhoons are expressed by two isolated vortices with positive vorticities, we performed numerical experiments about their interaction. The result indicated that the behavior of two unequal vortices with same size but different core vorticities was similar to the observed feature of Typhoon Fengshen (T0209) and Typhoon Fung-Wong (T0211). It is quite likely that the interaction of two unequal binary vortices with large separation distance caused the rotating trajectory of Typhoon Fung-Wong (T0211).
一般社団法人日本風工学会の論文