Surface Wind Estimation by using X-band Doppler Radar Network

Abstract

Surface wind retrieval system by X-band radar network is being developed around the Tokyo metropolitan area for the real-time monitoring of severe wind disaster. To estimate the wind information near the ground surface, the logarithmic velocity profile is assumed below the layer on which the upper (z=1000 m ASL) wind components are calculated. The comparison between the estimated and observed surface winds suggests that the windward surface condition (roughness) should be considered in the retrieval system. The wind estimation with the windward average of roughness length improves the estimation accuracy.