Looking for evidence against some points raised in Ivar Giaever's speech on climate change
Ivar's graph is mischievous in trying to imply that there should be an exact correlation. The global air temperature is not a good parameter to chart against CO2 emissions because the increasing heat doesn't just warm up the air. Most of the heat goes into warming the upper layers of the oceans, but it is not a linear relationship. The ratio of air and ocean warming varies massively with the state of ocean current, in which El Nino is just the largest of several ocean oscillations. If, instead of graphing the global air temperature, he graphed the global heat absorbtion, he would have arrived at a much more uniform relationship to greenhouse gas emissions.
Ivar is an engineer and a physicist, not a climate scientist, and his inability (or unwillingness) to look at the holistic picture makes me doubt his climate change credentials.