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800,000 years of climate from ice cores: CO₂, temperature, and the rhythm of the ice ages

800,000 years of climate from ice cores: CO₂, temperature, and the rhythm of the ice ages
Eight hundred millennia of CO₂ (red) and Antarctic temperature (blue silhouette). The grey band is the natural range over the whole record; the orange spike at right is the modern instrumental rise to today.

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POSTED BY: Marco Thiel
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Thank you for this remarkable contribution. I was particularly interested by the issue about CO2-rise before Temperature-rise, or Temperature-rise before CO2-rise in these long records. This, because Claude Allègre, a well-known and extremely influent geologist in France (he was minister of educatipn and science in the eighties), and a coterie of his friends at the French Academy of Science, have long fought against the IPCC conclusions long before Trump. One of their "major" arguments was precisely that they claimed to have observed in one case that the CO2 rise was lagging behind the temperature rise. Your final conclusion "Lead/lag analysis shows the two are essentially in phase within the chronological uncertainty" closes the debate.
POSTED BY: Philippe Dumas

I have just posted another contribution which is related.

https://community.wolfram.com/groups/-/m/t/3733750

Instead of long term ice cores that post considered tree rings.
POSTED BY: Marco Thiel
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