Willis Eschenbach has been looking at the Shakun et al paper that was the subject of my Greenhouse reversal post a couple of days ago. It looks as if he has found something important:
I leave the readers to consider the fact that for most of the Holocene, eight
millennia or so, half a dozen different ice core records say that CO2 levels were rising pretty fast by geological standards … and despite that, the temperatures have been dropping over the last eight millennia …