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Nature conspired against him. He started thinking about CO2 around the time of the PDO shift in 1977, coincident with a long period of exceptionally high solar activity, and other warming cycles.

He expected to see warming and he did. He testified before Congress in 1988, at the start of the most positive period in ENSO history.

The coincidence thoroughly confused him, and led him to finish his largely wasted career hanging out with drugged out hippies and occasional stints in jail.

He could make amends by admitting that he was wrong, but I’m not holding my breath.

His temperature forecasts from 1988 show conclusively that he was wrong. Temperatures are below his zero emissions scenario C.

http://pubs.giss.nasa.gov/docs/1988/1988_Hansen_etal.pdf

Real Science, 17 September 2011