I have already covered how Hansen (red line) wiped out the pre-1950 temperature record which had previously been reported by the National Academy of Sciences (black line.)
But there is more to this story. I overlaid Briffas trees (red below) on the 1975 NAS graph.
The correlation was excellent. So here is how the story goes.
- Briffa’s trees were a good match with the uncorrupted temperature data.
- So Hansen corrupted the temperature data
- Mann then said that Briffa’s trees don’t match the corrupted temperature data
- Mann threw out the good tree ring data, and replaced it with the corrupted temperature data.
That is how you hide the decline. Alter the data, make conclusions based on the altered data, use your bogus conclusions to justify throwing out the original data, and then present the altered data as if it were the original data.
Can science get any more corrupt?