Chimbu chuckles...I've just read the Tree Ring article, and noticed this statement, 3rd paragraph from the end....
The finding does not change our understanding of the warming power of carbon dioxide. In fact, it shows that human CO2 emissions have interrupted a long cooling period that would ultimately have delivered the next ice age.
And this from the hockey stick guy...
But others have doubts. Mann argues that Esper's tree-ring measurements come from high latitudes and reflect only summer temperatures. "The implications of this study are vastly overstated by the authors," he says.