Researcher Julienne Stroeve of the National Snow and Ice Data Center explains how melting arctic sea ice might be affecting the polar jet stream, and what this means for weather in the United States.

For more information on the jet stream and its impacts on weather in the Northern hemisphere, check out this video presentation by Dr. Jennifer Francis: youtube.com/watch?v=_nzwJg4Ebzo

Further discussion of Dr. Francis' work can be found at:
earlywarn.blogspot.ca/2012/04/slowing-rossby-waves-leading-to-extreme.html

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