The Wind Observation in Okinawa by Doppler Soda during Typhoons

Abstract

The wind structure of the atomosphenc boundary layer has recently become a vigorous concern in wind-resistent design of high-rise buildings. This study deals with the observation in Ckinawa by Doppler sodas during two typhoons in 1995. The mean wind speeds have shown good agreements with the referenced data obtained by the ultrasonic anemometer. It is confirmed through the analysis of three hours' record for each typhoon that the wind profiles are basically fitted by power law with the exponent of about 0.3. The height of the gradient wind, however, changes successively from 200 to 550m due to the Influence of the layers of clouds. The intensities of u-and v-component of turbulence have shown larger values than the ones by anemometer, while the intensity of the vertical component well coincides with the anemometer.