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

Summary

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 (likeθ _* andw _*). The use ofθ _*,w _* and the height of the mixed layerz _i, obtainable from other sources (i.e. radiosoundings), allows to verify some similarity relationships. We analysed the vertical profiles of the ratioσ ²_w /w ²_* : we found that it follows the theoretical behaviour depending onz/z _i if we use numerical coefficients slightly different from those usually referred to in the literature.