Fixing the Facts – By Steve McIntyre
Figure 1.4 of the Second Order Draft clearly showed the discrepancy between models and observations, though IPCC’s covering text reported otherwise. I discussed this in a post leading up to the IPCC Report, citing Ross McKitrick’s article in National Post and Reiner Grundmann’s post at Klimazweiberl. Needless to say, this diagram did not survive. Instead, IPCC replaced the damning (but accurate) diagram with a new diagram in which the inconsistency has been disappeared.
Here is Figure 1.4 of the Second Order Draft, showing post-AR4 observations outside the envelope of projections from the earlier IPCC assessment reports (see previous discussion here).
Now here is the replacement graphic in the Approved Draft: this time, observed values are no longer outside the projection envelopes from the earlier reports. IPCC described it as follows:
Even though the projections from the models were never intended to be predictions over such a short time scale, the observations through 2012 generally fall within the projections made in all past assessments.
So how’d the observations move from outside the envelope to insider the envelope? It will take a little time to reconstruct the movements of the pea.