Similarity parameters evaluation in the Po Valley during convective situations with Sodar data

In well-developed convection, the surface sensible-heat flux can be evaluated from Sodar data; by using these flux values, it is possible to estimate some scale parameters in the mixed layer (like theta* and omega*). The use of theta*, omega* and the height of the mixed layer xi, obtainable from other sources (i.e. radiosoundings), allows to verify some similarity relationships. We analysed the vertical profiles of the ratio sigma(omega)(2)/omega*(2): we found that it follows the theoretical behaviour depending on z/z(i) if we use numerical coefficients slightly different from those usually referred to in the literature.