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As a result of comments in this thread at Lavartus Prodeo, I have been Googling Solar Inertial Motion. Discussion on it is not easy to find outside anti-AGW websites.

The application of Solar Interial Motion (SIM) to Climate Change is a work of the Australian scientist, recently deceased, Rhodes Fairbridge

After some poking around, I found that SIM is a particular case of the Sunspot explanation for climate change, i.e. that changes in Solar Output explain Global Warming and Cooling.

Here’s Fairbridge in his article The “Solar Jerk”, The King-Hele Cycle,and the Challenge to Climate Science”

“… a planet revolving about the Sun in its “Keplerian” elliptical orbit delivered no energetic jolt to the Sun’s photosphere, such as might explain the episodic growth of sunspots.

But when two planets are involved, as the faster one passes the slower one, there is briefly a combined gravitational effect that is felt by each of the planets, and more importantly, by the Sun itself. This is not a tide (which is minuscule), but a torque.

The outer, gaseous layers of that star have a low viscosity that is susceptible to any change in the angular momentum…”

…so causing sunspots.

Fairbridge’s work is briefly discussed in comments on the pro-AGW WebSite Skeptical Science in the post “Global cooling: the new kid on the block” with contributions by a proponent of SIM. The Skeptical Science moderator responds:

… Fairbridge’s work but the general gist is that the alignment of the planets affects the sun’s angular velocity which affects solar output…the question of whether solar output is driving global warming has been thoroughly analysed.

and links to a page with this summary, well-known to anyone with an interest in the AGW debate:

Solar activity has shown little to no long term trend since the 1950’s. Consequently, any correlation between sun and climate ended in the 1970’s when the modern global warming trend began.

From the above it appears that the reason SIM is not in lively discussion is that it is already discredited. Solar forcings do not correlate to recent temperature data. CO2 does.

As Btian Eno might say: Here Come The Warm Jets


Father, we make claims on our knees
Dawn enter here for we’ve nowhere to be
Nowhere to be
Nowhere to be

Father, stains they’re all on our knees
Down on our words and we’ve nothing to be
Nothing to be
Nothing to be


Father, down we’re all on our saints
Paid to appease though we’ve nothing these days
Nothing these days
Nothing these days

Father, here they’re sprawled in a daze
We’re down on our knees and we’ve nothing to say

The title Warm Jets came from the guitar sound on the track of that name, which I described on the track sheet as ‘warm jet guitar’, because it sounded like a tuned jet. Then I had the pack of playing cards with the picture of the woman in there, and they sort of connected. That was one of the things that was going on at the time: this idea that music was still tied to some idea of revolution, and that one of the revolutions was a sexual revolution. I wasn’t making a big political point, I just liked having fun with those things. Most people didn’t realise for a long time — it was rather deeply concealed!”

Brian Eno, interviewed by Andy Gill in Mojo, June 1998


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  1. […] Under The Milky Way “Why does anyone hide anything except to have it found” – Gwendolyn MacEwen, “Open Secrets’ About « Solar Interial Motion Hypothesis Cannot Explain Recent Global Warming […]

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