A STUDY ON MULTI SCALE CHARACTERISTICS OF THE SURFACE-LAYER TURBULENCE ON DIFFERENT UNDERLYING SURFACE

The observational data of turbulent velocity, temperature fluctuation on se veral complex underlying surfaces are used to analyze the microstructure and transfer characteristics of turbulence near the surface by statistical method and multi-scale analysis scheme. The results show that different underlying surface structures affectevidently turbulence, for example: Gobi underlying surface's thermal affection is more obvious than another regions. This causes turbulent time scale in Gobi to be very larger than those in another regions. However turbulence spectra on complex underlying surfaces in the inertial subrange conform to "-2/3" power law; It is simple to analyze turbulent multi-scale structures and their action on turbulent transfer with multi-scale analysis method. It shows that multi-scale method is a valid tool to develop turbulent statistical theory.