The question of using of adiabatic invariants in climate studies and for verification of General Circulation Model is discussed. Main functionals from these invariants, which are slowly transformed only due to the influences of irreversible processes could be convenient indices of climatic changes. Short review of vari- ous diagnostic methods based on the analysis of potential vorticity and potential temperature fields and the functionals from these meteorological parameters in the investigations of weather regimes and climate vari- ability is presented. The example of the use of some of these methods to the analysis of the output data of CPTEC General Circulation Model is given.Pages: 261-27
