Dr Trenberth says,
“In fact there are no predictions by IPCC at all. And there never have been. The IPCC instead proffers “what if” projections of future climate that correspond to certain emissions scenarios.”
There are an awful lot of policy makers and others driven by the the content of the Al Gore movie and the general blizzard of scary predictions of the future pumped out by the media, that are sure acting as though they believe the IPCC makes predictions; and good, believable predictions too.
For the full statement by Dr Trenberth and many comments, go to the Climate Science: Roger Pielke Sr. Research Group Weblog.