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R Taylor says:
The authors had the decency not to note that CO2 has done nothing but increase during this 2000 years of cooling.
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otsar says:
The cynic in me says that that we will see more publications like this pass peer review as policy makers try to extricate themselves from the corner they have painted themselves into. When I read temperature reconstructions, tree rings, and precisely calculate in the same article my scepticism goes up. I hope they make all of their reasoning and work available. Having said that, I hope this is good work and that there is more forthcoming.