So it was a bit of a surprise to see Stefan Rahmstorf's broadside about "Sealevelgate":
Reading between the lines a little, I somehow don't think this is really just about the AR4. Scientifically speaking, that is old news, indeed it was old news by the time it was published. Rather, this looks like more like an opening salvo over the forthcoming AR5. Alert readers may have noted that the current Chair of WG1, Thomas Stocker, was a co-author on the Siddall et al sea level rise paper that Rahmstorf (with Vermeer) forced the retraction of, and was also one of the Coordinating Lead Authors on the relevant chapter (10) of the AR4. It may not be too great a stretch to imagine that there may be some strained relations there.
In its latest report, the IPCC has predicted up to 59 cm of sea level rise by the end of this century. But realclimate soon revealed a few problems.
[...]Some scientists within IPCC warned early that all this could lead to a credibility problem, but the IPCC decided to go ahead anyway.
Nobody cared about this.
I don't have any particular stake in the sea level rise predictions. I do think it was pretty spineless and inappropriate of the IPCC to duck the issue in the way that they did (by basically ignoring dynamical ice sheet response - if they really thought this was not going to happen, they should have said so clearly). OTOH the conceptual time series models presented by Rahmstorf and others may be a bit too simplistic to have much credibility for predictive purposes. I suppose I won't know what I really think until I look into it myself...which may be some time away. In the meantime, pass the popcorn, as Eli would say.