Abstract
Long term observation of wind condition at high altitude in central part of Tokyo has been conducted using doppler lidar. The characteristics of the measured data were organized, and the influence of thermal stratification, surrounding high-rise buildings and the strength of the wind speed were examined. Variations in data acquisition rate, i.e. decrease at the altitude and in winter were shown, and it is difficult to grasp statistical characteristics of wind conditions only by observation data. The influence of buildings about 200 m height was shown around 300 m in altitude, and the wind conditions were greatly different depending on the wind direction due to the influence of surrounding buildings condition using the reliable data.
