The algorithms used to create the adjustments are very simple.
- Pre-1900 temperatures are adjusted upwards to hide the 1900-1940 warming trend, which can’t be explained by CO2
- The 1930s are adjusted downwards to hide the hottest decade in US history
- Recent temperatures are adjusted way up, because Hansen’s theory demands that temperatures correlate with rising CO2.
“If the facts don’t fit the theory, change the facts”
– Albert Einstein