A detailed article on Climategate. A bit about raw data:
Anthony Watts has surveyed over 75% of the 1,200-plus U.S. weather stations from which national temperatures are accumulated. Most of those were found to be inaccurate by more than 2°C, largely due to being located within ten meters of an artificial heating source. In fact, less than 10% met strict placement guidelines set forth by the National Oceanic and Atmospheric Administration. Not to worry -- NOAA claims it has methods to “adjust” for such bias, including the use of “smoothing” adjustments to “homogenize” station data to that of surrounding stations.
Would you be shocked to learn that at ICCC 3, Watts told us he had calculated such adjustments to raw temperature data between 1940 and 1999 to be 0.5°F to the positive? That accounts for almost one half of the 1.2°F warming over the last century.
And that’s here in America. Try to imagine what kind of shenanigans might be going on elsewhere in the world.
Not hard to imagine; people have done far worse things for power.