I linked you to the hockey stick that they co-authored. You seem to think they do good work. I agree, and among that good work is their contribution (among dozens) to yet another graph of historical global temps - including the summer means in South America they measured, the Greenland ice cap fluctuations, the whole shootin' match - that looks like yet another hockey stick. Causal of course - all solar fluctuations have an effect on the temperature of the Earth's atmosphere. Of course these days they tend to get overridden by the effects of this CO2 boost, but there's no reason they would vanish entirely.