We agree that if the chart above is accurate (a very big IF indeed), some anomalous warming has been taking place on earth recently. Certainly the hockey stick is alarming. But perhaps what should have been more alarming is the disappearance of the Medieval Warm Period from roughly 900-1300, when temperatures were several degrees warmer than they are today. For example, it was warm enough and the seas were sufficiently ice-free in about 1000 AD that Leif Eriksson was able to sail to Newfoundland, which later became impossible again.
We certainly hope that the Michael Mann versus Mark Steyn lawsuit goes to trial. We’d very much like an explanation for the mysterious disappearance of the MWP. We’d also like to hear all about hiding the decline as well.
Update: Steyn has lots more of course.