Anthony Watts (WUWT) reports a paper:
Empirical evidence for a celestial origin of the climate oscillations and its implications .
Journal of Atmospheric and Solar-Terrestrial Physics (2010),doi:10.1016/j.jastp.2010.04.015
George Taylor, former Oregon State climatologist writes:
Nicola Scafetta has published the most decisive indictment of GCM’s I’ve ever read in the Journal of Atmospheric and Solar-Terrestrial Physics. His analysis is purely phenomenological, but he claims that over half of the warming observed since 1975 can be tied to 20 and 60-year climate oscillations driven by the 12 and 30-year orbital periods of Jupiter and Saturn, through their gravitational influence on the Sun, which in turn modulates cosmic radiation.
If he’s correct, then all GCM’s are massively in error because they fail to show any of the observed oscillations.
There have been many articles over the years which indicated that there were 60-year cycles in the climate, but this is the first one I’ve seen which ties them to planetary orbits.