Arctic Sea Ice Cover 1979 - 2012 Minimum Summer Sea Ice in 1979 ~ 7.01 million sq km Red line outlines extent for reference Minimum Summer Sea Ice in.

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Arctic Sea Ice Cover 1979 - 2012 Minimum Summer Sea Ice in 1979 ~ 7.01 million sq km Red line outlines extent for reference Minimum Summer Sea Ice in 2012 ~ 3.44 million sq km a loss of 51% in 33 years Significantly lower in 2012 than average minimum Source http://www.nasa.gov/topics/earth/features/2012-seaicemin.html

How Variable is Wind Energy? 70% of Wind Output is now Visible to National Grid Predictions are made 2 days and 1 day in advance and demonstrate a correlation comparable with the prediction of demand variations. Prediction made at 21:00 for next 48 hours for last week of January 2012 Prediction made 1 day later and typically for output 24 hours in advance Actual Output in last week of January 2012

Predictions made at 21:00 for 48 hours in advance Coefficient of Correlation - 0.9105 ………… 8865 separate data points

Predictions made at 21:00 for next day advance Coefficient of Correlation - 0.9603 ………… 8865 separate data points

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