Prof. Box is a researcher that must be followed. He is a lead IPCC author. If you cannot watch the entire video, then I recommend you skip to 10:50 and hang in for several minutes. The Arctic is changing very fast and the prognosis for the near future is not good. Remember, as the Artic warms releative to latitudes further south, there are worrisome implications for the northern jetstream that interacts with the temperature differentials between the northern Polar , Ferrel and Hadley cells.