Jennifer Francis Unchained, Breckenridge, January 2013

Nice that she uses Peter Sinclair's montage for about the first 3 minutes. Nothing you don't already know for the first 20 minutes, but she has done a really good job of using good graphics and explanations for a wider audience, including using a deck of cards.

But you might want to start at minute 20 because then she goes into the amount of warming over the Arctic with some good graphics showing how the heat varies by season and altitude -- very significant warming in the winter and at altitude in the winter.

http://www.youtube.com/watch?feature=player_embedded&v=xugAC7XGosM