In my humble opinion there is strong linkage to extreme weather and lack of arctic sea ice, the current weather set up, and climate change. Dr. Jenifer Frances of Rutgers University research with an easy to follow presentation from last year on youtube. http://www.youtube.com/watch?v=ETpm9JAdfcs Roger Hill Weathering Heights Consulting 186 MacKenzie Dr. Worcester VT 05682 Nature never breaks her own laws --da Vinci