Global magnetic field cycle evolution and prominence eruptions

A comparison of changes in the structure of the global solar magnetic field and that in the prominence parameters, in solar cycles 21-23, are presented. It is proposed that the observed global magnetic field structure changes and periodicities in the mean solar magnetic field are the result of the excitation of large-scale Rossby waves. The changes in the prominence parameters are assumed to be the result of the global magnetic field structure changes, which may be triggered or modulated quasi-periodically by large-scale Rossby waves.