In this work we report an analysis of various indices of solar magnetic variability of closed and open field, concentrating particularly in the quasi-biennial peridicities (1.7-2.5 years). The wavelet technique is used in the time series of the solar indices to find the significant periodicities of our study, we also use other wavelet analysis already made. We consider the theory of a double solar dynamo, with its low frequency component located at the base of the covection zone, and its high frequency component in the upper part, coupled by the helicity (alfa effect). In this context, we obtain a classification of the couplings between the low and high frequency components per cycle along cycles 17 to 23, based on the strength and regularity of the quasi-biennial periodicities.

Proceedings of the 30th International Cosmic Ray Conference; Rogelio Caballero, Juan Carlos D'Olivo, Gustavo Medina-Tanco, Lukas Nellen, Federico A. Sánchez, José F. Valdés-Galicia (eds.); Universidad Nacional Autónoma de México, Mexico City, Mexico, 2008; Vol. 1 (SH), pages 505-508