from 19 Versions and Whadda You Get Climate Audit edthecynic and others proclaim that the gang from NASA are the ultimate authority on land temps. they post up links that say they are the ultimate authority and that they never make changes unless it is necessary but never give any actual figures. The grunt work is left to enthusiastic amateurs like McKitrick, McIntyre, Watts et al. The link shows that these adjustments go back a hundred years and they are arbitrary. They do what they want. And the adjustments almost always decrease old temperatures and increase newer temperatures, greatly changing the temperature trend. Why? How can people work with figures that change several times a year? from Rewriting History, Time and Time Again Climate Audit When is the US Govt going to put in a forensics audit team to go in, write some real code, investigate the data, and give climate science a real and unchanging historic data set to work with? I am pretty sure there are a lot of top notch accounting firms that could do a better job and for a lot less money than Hansen and his cronies.