Subharmonic and chaotic resonances in solar activity
Subharmonic and chaotic resonances in solar activity
It is shown that the wavelet regression detrended fluctuations of the monthly sunspot number for 1749–2009 years exhibit strong periodicity with a period approximately equal to 3.7 years. The wavelet regression method detrends the data from the approximately 11-years period. Therefore, it is suggested that the one-third subharmonic resonance can …