Too much Sorros money sloshing around in their brains...
Well, that's actually exactly what it may mean - given that the study gives a confidence / error margin of 0.2 - 0.56 *C, it's completely within normal standard deviation, and 60 years is a facile and farcical period of time across which to measure fluctuations in global climate anyway.
This chart is complete nonsense.
This is tobacco science. It's junk.
Global temperature averages were meant to have increased by 4*C from 2000 to 2012 and that just hasn't happened.