Fred Singer has an article here discussing problems with the computation of the Global Average Temperature Anomaly (GATA). Like a lot of people, I have long had doubts about the terrestrial temperature records kept by folks who believe the AGW hypothesis is valid at NCDC, NASA/GISS and HadCRU. I suspected confirmation bias, if not outright deception, and this suspicion was reinforced by their refusal to share data or their computational techniques, and their assertions that the raw data had been destroyed ("the dog ate my homework" excuse). The satellite measurements are open, and when errors were identified by critics, corrections were made. The terrestrial records are so compromised that it is not possible to tell if there is actually any temperature increase due solely to the increase in atmospheric CO2 concentration.