re: Your occasional reminder that global warming is real,

quote:

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CO2 driving temperature doesn't "require" an off switch. Temperature characteristics within our biosphere do. The result is a plummet to glaciation. The process is repetitive, cyclical, and substantially predates any anthropogenic influence.

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So what?

You never get around to explaining why the ice cores and the paleo record are relevant. I've asked you directly if you are attempting to use them to prove that temperature is currently driving CO2, and you've said you aren't. Such a conclusion is obviously not tenable given that CO2 levels are already 100ppm higher than the interglacial peaks, and given that the pace of warming is substantially faster than in the ice core records, where even a single pixel on the X axis represents millenia.

But if that's not the purpose of citing the ice core records, what is? It is trivially true that temperature led CO2 during prehistoric glaciation. This is not in the least controversial. The physical laws have been known since the 19th century and the ice cores are discussed at length in the IPCC. It's a positive feedback cycle that can be driven from either end. More CO2 means higher temps, and higher temps mean more CO2.

But current climate change doesn't match the ice core pattern at all, otherwise we would be seeing millenia-scale cooling, not century-scale warming.