STUDY ON CHARACTERISTICS AND PARAMETERIZATION OF THE MEAN WIND SPEED PROFILE ABOVE TOKYO REGION BASED ON METEOROLOGICAL LOCAL ANALYSIS DATA

Abstract

This paper verifies the accuracy of the meteorological local analysis data and investigates the influence of the atmospheric stability and urban substrate on the power-law index of wind profile in Tokyo. The spatial distribution of the power law index also is shown taking advantage of local analysis data. The comparison of local analysis data and observation data by Doppler lidar has been conducted. The atmospheric stability has been analyzed in the Tokyo area utilizing local analysis data and the virtual potential temperature method. After stability classification, the influence of atmospheric stability and urban substrate on the power law index α of wind profile has been investigated. The variation of the power law index of local observation location and spatial distribution of the power law index in the Tokyo region from 2018 to 2020 has been examined. The results indicate that the atmospheric instability in the Tokyo area is more frequent than in Chiba in a year. The α gradually increases with changes in atmospheric stability from unstable, neutral to stable and the roughness length of upwind fetch has an obvious influence on the α . In addition, the α of some local areas has obvious fluctuation from 2018 to 2020.