2018年台風21号による暴風の解析

Abstract

This study investigated the severe winds occurred in the Kinki District and the surrounding areas during the passage of Typhoon Jebi (2018) that developed in September 2018. This typhoon has induced currently the most costly meteorological damages to Japan. The analyses of the surface observational data indicated that the gust factors in urban areas amount to 2.0 or greater, which are significantly higher than those typically known at meteorological stations in a climatological sense. The coupled analysis of both a mesoscale meteorological model and a large-eddy simulation model demonstrated that the maximum wind gust in the analysis area of Osaka City was estimated as 60-70 m/s, which is comparable to the wind speed at the height of about 300 m.