I have stopped trying to argue with someone who refuses to look at anything but that which supports his own position. It’s pointless. So in an effort to end a debate quickly, I now politely ask individuals to explain how CO2, given how small it is relative to all around it, actually changes the entire system. That usually stops it with most of the crowd. Like many things I see with new age forecasters today, they will jump on one weather factor and not understand its behavior is because of everything around it.
As the earth adjusted to the warmth supplied by this natural cycle, the warmth that was occurring, combined with the change of the Atlantic cycle to warmer, lead to a marked decrease in Arctic sea ice. It reached a crescendo in 2007, the year of the death spiral along with forecasts of no summer ice in 2014. Through it all, our side of the AGW argument said this is a natural phenomena, and once the AMO flipped, the summer sea ice, which is the most obvious talking point for those advocating the Arctic death spiral, would come back. As always, the Southern Hemisphere ice, because it was above normal, was ignored.