Signs of strain in justifying climate predictions

Professor Michael Kelly, Prince Philip Professor of Technology, University of Cambridge, kindly sends us his comments on a letter this month to Nature Geoscience, Test of a decadal climate forecast, by Myles R. Allen, John F.B. Mitchell and Peter A. Stott. I previously commented on the letter in Climate forecasts fulfilled or what? Mike just returned to England after spending seven months as Visiting Professor at the prestigious MacDiarmid Institute, Victoria University of Wellington.

The recent paper of Allen et al. does a careful job of estimating errors in forward projections of global temperatures from earlier calculations on global circulation models of the atmosphere. Given the simple question — are the models doing a good job or not — the increasing level of sophistication needed to defend them is of concern. For many of us, a temperature stasis of 17 years is enough to suggest that the models are not as robust as some of their advocates maintain. Continue Reading →

Is the game nearly over

From a correspondent

I think the game is up for the pro-AGW crowd due to the lack of temperature rises over the last 16-23 years.

It looks like Gavin Schmidt might be jumping from the sinking ship now as well. To me, Gavin looks like he’s positioning himself for a back-down on his AGW position – why would he point out the flaws with Nuccitelli’s post otherwise, it’s no concern to him? I think Hansen, even though he admitted the lack of a temp rise over the last 16 years, was given the boot from NASA Continue Reading →