[MtnClimber]

Thanks for posting the sunspot number graph from the link you posted earlier. I was looking at that. You can see the 11-year cycle clearly where the sun spots go to zero or nearly zero every cycle. Also clear is the sunspot peak intensity cycle that is much longer than the 11-year cycles. What the cycles look like during ice ages vs. interglacial warming periods is not exactly known. There are some sunspot proxies like radioactive strontium levels in Antarctic ice cores that are related to sunspot activity.

It would be interesting to see global average temperatures plotted on the same graph. Surface stations or satellite measurements. Not the BS surface station measurements with correction factors to make it match the global warming computer models that the warmists use.

[nagant]

Yeah, the warmist climate theory says that greenhouse gasses cause the middle atmosphere to warm, and that in turn warms the earth’s surface. But the only evidence they offer comes from surfaces affected by expanding urban heat islands. That’s because the middle atmosphere is actually cooling.

Conversely, I don’t see any reason to think that sun spots and solar radiation during ice ages differ from sun spots and solar radiation during interglacials. We have a definitive geometric explanation for the cause of ice cycles. It’s called the Milankovitch cycle.