The long-term fluctuations of the water level of lakes and the solar activity

The relationship between solar activity and the water volumes of lakes is searched here by means of correlation and spectral analysis methods. The lever of two, Patzcuaro in Mexico and Peipsi (Chudskoye) in Russia and Estonia*, together with solar activity indexes are used for the analysis. It is found that the source of the fluctuation mechanism of the level of those lakes is the solar activity cycle through its influence on the magnetosphere and the terrestrial atmosphere. The present study allows for the development of long-period prognostic of water volumes of the big lakes.