静止気象衛星を用いた台風強度推定に向けて --SAR海上風との比較検討--

Abstract

Geostationary meteorological satellites are the only instruments that can observe tropical cyclones (TCs) over their life cycle. To develop a new method for estimating TC intensity using geostationary meteorological satellites, a method for estimating the radius of maximum wind speed (RMW) from infrared images observed by geostationary meteorological satellites is investigated. We found that the radius of the eye (R[eye]) obtained from infrared images and the RMW obtained from sea surface wind observed by Synthetic Aperture Radar corresponded very well, with a mean absolute error of 3.5 km. On the other hand, in some cases, the correspondence was poor, and it is necessary to create a criterion to judge the correspondence from infrared images. There was no significant difference in the correspondence by developmental stage.