What Dr. Scafetta is missing is the causal link between the planetary orbital periods, solar activity and the Earth’s Climate. This does not dismiss the possibility that such a link could exist, it just says that the mechanism is (currently) unknown.
The answer to his dilemma is the Moon. The Lunar tides of the Moon do have a discernible influence upon long term climate here on Earth.
The Moon has been moving away from the Earth ever since its formation billions of years ago. As it has moved away its orbital period has continuosly changed. This means that the properties of the Lunar Orbit have been shaped and moulded by combined tidal and gravitational effects of Venus and Jupiter, particularly at times when the orbital periods of these planets have been a sub-multiple of the orbital period of the Moon.
I will be showing in a paper to be published in 2011 that long term changes in the Lunar orbit are synchronized with long term changes in Barycentric motion of the Sun.
I cannot discuss these links in this forum as yet until I can get my paper published.
It might be eventually shown that the level of solar activity on the Sun is determined
by the barycentric motion it undergoes due to the gravitational influences of the Jovian planets. It might also be reasonable to argue that changes in the level of solar activity have an effect on the Earth’s climate. All I am saying is that what ever effects changes in solar activity have upon the Earth’s climate are being greatly reinforced by synchronized changes in the long-term variations in strength of lunar tides
experienced here on Earth.
I believe that the Lunar tidal effects will be identified as the (dominant) mysterious “amplification mechanism” that strengthens the apparent link between solar activity and the Earth’s climate.