An update to (and much needed correction of) this post.
Bishop Hill has a highly readable post up about the shenanigans around the Yamal chronology: The Yamal implosion. That post focusses mostly on the friction that McIntyre experienced in his efforts to get access to the data underlying the hockey stick.
Meanwhile, independent confirmation of McIntyres findings comes from a presentation on climate on the Yamal peninsula by Walker at al. Watts up with that has the goods.
This should be the bell tolling for the climate changes hype. After this story has played itself out, climate change credibility will have been reduced to zero.