Michael Mann has written me a thoughtful email declining the invitation to contribute. He writes, “However, the issues you raise have already been dealt with already in some detail on RealClimate.org. A good place to start would be the post by my colleague Stefan Rahmstorf at http://www.realclimate.org/index.php?p=114. I’m sure you will find this, and the other materials there quite relevant to the issues you raise.”

While I regret that Michael Mann won’t be participating, the invitation to contribute remains open to any other member of the RealClimate team, or other relevant collaborators.