I've done some reading of those threads and links and I find it all very interesting. I do find it hard to validate though or be sure of an interpretation. But if its part of the cycle of the sun, solar energy or shifting of the magnetic poles, then so be it. Pretty sure we can't change it by reducing carbon.

I suppose I am more interested in the times when there has been rapid climate changes, and why. From a Bayesian analysis I think there are some interesting theories that hold weight.

eg - there was some kind of event as we came out of our last glacial maximum (which was 20k BP, so at around 13k bp) that sent us back into an ice age almost overnight.

Indications of this include a sea level rise, meltwater pulse 1b, eradication of over 70 species of megafauna (Nth America & Europe) & the Clovis culture, discovery of a 50mil sq m radius of the 'black mat' boundary ['Black mat' is a mix of nano diamonds, microspherules of carbon + more that only fuse together at extreme temperatures & velocities - only other example is found at KT layer (65mil yrs).]

Then there is the geology. Check out the NW US landscape.

Then think how such an event would be communicated by survivors? The history of the emergence of religion and especially mythology.