Generation of Artificial Turbulent Fluctuations of Wind Velocity and Temperature in Unstable Boundary Layer

Abstract

This paper aims to propose a method to generate turbulent fluctuations of wind velocity and air temperature under unstable condition. The artificially generated turbulent fluctuations satisfy not only the prescribed profiles of turbulent fluxes but also the prescribed spatial and time correlations. Turbulent fluctuations were generated by this method using the turbulent fluxes and turbulent time scale under unstable condition measured at COSMO site. The statistics of the generated turbulent-fluctuations are analyzed to verify the reproducibility by comparing them with the measurement data obtained in COSMO.