According to DeBruin et al. (1991) a classification of the underlying surface can be made using a similarity relation, the so-called 'flux-variance-relation'. This is expressed by a proportionality between turbulent flux and the parameter which characterizes this flux (Obukhov, Wyngaard). These normalized (by the flux) turbulence characteristics were used by Foken and Wichura (1996)to test the structure of turbulence, for instance, if the turbulent regime is fully developed or destroyed. In the present paper the stability dependence of the normalized turbulence characteristics was updated using several experiments. For two different and very complex measuring sites (hilly forest region of the 'Fichtelgebirge' near Bayreuth and extreme hilly region of the 'Krushne Hory' near Teplice/Czech Republic) the normalized turbulence characteristics will be compared with the results of a footprint analysis using the model given by Schmid (1994). No final resuls can be presented in this abstract, because most parts of the experiments will be done in summer 1998