Long Term Sunspot Cycle Phase Coherence with Periodic Phase Disruptions
  In 1965 Paul D. Jose published his discovery that both the motion of the Sun about the center of mass of the solar system and periods comprised of eight Hale magnetic sunspot cycles with a mean period of ~22.37 years have a matching periodicity of ~179 years. We have investigated the implied link between solar barycentric torque cycles and sunspot cycles and have found that the unsigned solar torque values from 1610 to 2057 are consistently phase and magnitude coherent in ~179 year Jose Cycles. We are able to show that there is also a surprisingly high degree of sunspot cycle phase coherence for times of minima in addition to magnitude correlation of peaks between the nine Schwabe sunspot cycles of 1878.8 to 1976.1 (SC12 through SC20) and those of 1699 to 1798.3 (SC[-5] through SC4). We further show that the remaining seven Schwabe cycles in each ~179 year cycle are non-coherent. In addition we have analyzed the empirical solar motion triggers of both sunspot cycle phase coherence and phase disruption, from which we conclude that sunspot cycles SC28 through SC35 (2057 to 2143) will be phase coherent at times of minima and amplitude correlated at maxima with SC12 through SC19 (1878.8-1964.8). The resulting predicted start times +/- 0.9 year, 1 sigma, of future sunspot cycles SC28 to SC36 are tabulated. 
Gerald E. Pease, Gregory S. Glenn
astro-ph.SR