“IPCC – How not to compare temperatures“. Anthony Watts posts Frank Lansner’s complaint on a favorite subject, alleged flaws in how the IPCC compares temperatures. Frank says that “there are numerous issues discussed intensely when it comes to IPCC-illustrations of historic temperatures” but other than the standard check list of groundless accusations and fabrications, his case really boils down to this: the IPCC is using too many temperature data sources and is averaging them!

So suddenly the problem isn’t lack of data, now it’s too much data. I also have to note with some astonishment that this is a complaint about how the IPCC illustrates historic temperature trends, not about the statistical trends that they are attempting to illustrate.