Ian Wilson: Connecting the 208 Year de Vries Cycle with the Earth-Moon System

Reposted for discussion from Ian Wilson’s blog Astro-Climate Connection UPDATED & CORRECTED 23/08/2013 Direct instrumental observations of the Sun since 1610 have shown that the level of sunspot activity on the Sun has a mean periodicity of 22.3 years, known as the Hale cycle. In addition, these observations of the Sun have shown that there … Continue reading Ian Wilson: Connecting the 208 Year de Vries Cycle with the Earth-Moon System