Here is a link to Siberia's historical temperature records, most go back to 1917.
http://www.john-daly.com/stations/stations.htm#Russia
This one for instance is in the heart of Siberia. There is no increase in temperatures at all.
http://www.john-daly.com/stations/dikson.gif
It continues to surprises me that all these studies get reported saying the temperatures have been increasing 3 Deg. C or something in the arctic when the actual measured records show nothing of the kind.