This guys credibility going the way of Al Gore.
MICHAEL MANN CAUGHT DOCTORING DATA AGAIN
Prominent global warming alarmist Michael Mann misrepresented data in a public presentation on global warming to give the false impression that global temperatures have been rising as fast as or faster than predicted by alarmist computer models. Scientist/mathematician Steve McIntyre showed Mann misleadingly presented land-only temperature readings (which are warmer than combined land/ocean temperature readings) and compared them to climate alarmist James Hansenís land/ocean temperature predictions to support his false claim that real-world warming is outpacing computer models. Mannís supporting temperature chart ends in 2005 even though post-2005 temperatures were available. The post-2005 data show real-world temperatures are substantially lower than Hansenís predictions.
SOURCE: Climate Audit http://climateaudit.org/2013/03/02/mikes-agu-trick/
Of course, amid massive accusations of fraud and intellectual dishonesty a few years ago, Penn State conducted a closed internal investigation of Mikie, and determined he had done nothing wrong (and therefore they did not have to give back all that grant money).
And of course, we all know the Penn State admins would never do anything to cover up the truth.........