Joe Romm says that the hockey stick represents unprecedented global warming.
This is amazing, because the IPCC was completely unaware of this phenomenon in 1990. Apparently the world was heating out of control and the climate was collapsing since the middle of the 19th century, but the IPCC completely missed it. They thought that the world warmed much faster coming out the LIA. How could the world’s top climate scientists have been so ignorant?
