Yet another fevered analysis on adjustments from Willis Eschenbach, this time on GIStemp in Alaska. As usual, everything that he doesn't understand means someone is fudging ("Fudged Fevers").
Ironically, there was huge pressure from sceptics that led to GISS to completely release their code and data some years ago. They may have hoped that the fudge fans would at least look at what is in the code first to find where it's done. But no.
The adjustment in question is GISS's way of dealing with the Urban Heat Island effect. The sceptic chorus is that measured warmth is an artefact of measurements being taken near cities, at airports or whatever. There is indeed a UHI, and here's what GISS does about it.
Update Apparently an issue now is whether GISS erred badly in classifying Matanuska AES as urban according to satellite-observed night brightness. I have added below a satellite map pic of Matanuska AES. It's not far from Wasilla. It is in fields, but about 1 km from a major freeway intersection, and about a mile from what looks like a car sales lot.