STUDY ON WIND PROFILE OF TYPHOON HAGUPIT USING WIND OBSERVED TOWER AND WIND PROFILE RADAR MEASUREMENTS

Using field measured wind data of strong typhoon Hagupit conducted on two wind observed towers and Airda 3000Q wind profile radar, tower-height level typhoon wind profiles and boundary layer typhoon wind profiles are studied. In the tower-height level wind profile, the maximum wind height is higher than 70m, and exponential index α decreases with mean wind speed when wind approaches from land side; while the maximum wind height is about 50m, and exponential index α increases with mean wind speed for onshore wind. In the boundary layer wind profile, the gradient height is 450m in the front eye-wall, 300m in the back eye-wall and 200m in outer-vortex. Log law and power law can be used to describe the typhoon Hagupit profile below 300m height in eye-wall region and 200m in outer-vortex, but the parameters are different from those values recommended in the wind code. Modification is needed for Deaves-Harris ABL model to describe typhoon Hagupit profile.