The map shows the impressive loss of Arctic sea ice when measured each September. The outer black line shows average ice coverage between 1979 and the year 2000. The yellow line shows ice coverage back in 2007, which at the time was the smallest aerial coverage since satellites began collecting data. The white color shows ice coverage in September of 2012, which was a new low, covering only 3.41 million square kilometers. It should be noted that ice coverage expands each winter and then retracts during the summer season, reaching its minimum extend each September.
You can read more about the 2012 report of Arctic ice loss and the impacts at: www.climate.gov/news-features/understanding-climate/2012-state-climate-arctic-sea-ice
Meteorologist Rod Hill, follow me @