Bishop Hill has an account — Lindzen at the Oxford Union — of the recent Oxford debate involving (mainly) Professors Richard Lindzen and Myles Allen. The latter comments (1.25pm):
“I was deeply embarrassed to be associated with Hasan’s ad hominem attacks on Dick Lindzen, in particular his going on about speaker fees and airline tickets. I thought this was going to be a discussion of climate science, and most of it seemed to be, as ever, about people and politics. As I hope I made clear when I had the chance, these were completely irrelevant to the discussion (and nothing he brought up seemed in any way exceptionable anyway) and that kind of attempt at personalising everything is just what is preventing a sensible discussion. I am very sorry that a visitor to Oxford was treated in this way.
On the science side, I’m happy to accept that studies comparing simple models with observations of the recent record, of which several have been published recently, suggest a climate sensitivity in the region of 2 degrees (although this isn’t the only line of evidence). But even a two degree sensitivity, if we do decide to burn all available fossil carbon, which would take concentrations well over 1000ppm, would be more than enough for 4+ degrees of warming. The real question, therefore, is whether 4+ degrees is OK. That’s what we need to be discussing, and unfortunately, because once again it was side-tracked onto irrelevancies, the debate didn’t go there.” (emphasis added)