Expect a renewed interest in the shape of hockey sticks, as a new paper in the Proceedings of National Academy Of Sciences (PNAS) by Michael Mann (et al) finds that the last decade was the warmest for at least 1,300 years. The BBC headlines the story “Climate “hockey stick” is revived”, which rather stretches the facts about the controversy (nicely covered in the piece). More coverage at Mongabay, which notes:
The results confirm that temperatures today in the Northern Hemisphere are higher than those of the Medieval warm period, a time when the Vikings colonized Greenland are are believed to have become the first Europeans to visit North America.
Sounds like a red rag to sceptic bulls to me. Expect much nit-picking and fulmination. The rest of us will get on with trying to sort out the problem.
Mann et al. (2008). Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia. PNAS September 9, 2008 vol. 105 no. 36 (PDF available here)