My thanks to Astrophysicist Ian Wilson who has left a long comment which I’m reposting here for further discussion, because it contains findings which are as Ian says, amazing (and Ian isn’t a man of hyperbole) . The summary below is further explained in Ian’s new paper which I’ll be putting up a further post on soon:
Are Changes in the Earth’s Rotation Rate Externally Driven and Do They Affect Climate?
which is available from this link. This is a stupendous work, containing many exact period matches, rather than being dominated by tenuous statistical derivations like so many other climate papers are. Top quality science on the talkshop. In the meantime, to whet your appetite:
We know that the strongest planetary tidal forces acting on the lunar orbit come from
the planets Venus, Mars and Jupiter, in order of the size of their respective tidal
influences. In addition, we known that, over the last 4.6 billion years, the Moon has
slowly receded from the Earth. During the course of this lunar recession, there have been
times when the orbital periods of Venus, Mars and Jupiter have been in resonance(s) with
the precession rates for the line-of-nodes and line-of-apse of the lunar orbit. When these resonances have occurred, they would have greatly amplified the effects of the planetary tidal forces upon the shape and tilt of lunar orbit. Hence, the observed synchronization between the precession rates of the line-of-nodes and line-of-apse of the lunar orbit and the orbital periods of Venus, Earth, Mars and Jupiter, could simply be a cumulative fossil record left behind by these historical resonances.