AN INDEPENDENT METHOD TO DETERMINE THE HEIGHT OF THE MIXED-LAYER

A method for the independent evaluation of mixed-layer (ML) height, zi , has been proposed. The ML height is determined by the functional rel ationships z(i) = 0.75z/n(vmax) or 0.53z/n(umax) in which, z is a meas uring height; n(vmax) and n(umax) are normalized peak frequencies of l ateral velocity component, v, and longitudinal velocity component, u, spectra at height z in the surface layer respectively. Using Doppler s odar data, the technique was shown to be feasible; it is easy to apply to micro-meteorological field experiments and works even for the ML t op above the range of the sodar.