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This month, NASA scientists reported sea ice continues to decline by a remarkable six percent a year. "This amount of Arctic sea ice reduction the past two consecutive winters has not taken place before during the 27 years satellite data has been available," said Joey Comiso, a research scientist at NASA's Goddard Space Flight Center, Greenbelt, Md. "In the past, sea ice reduction in winter was significantly lower per decade compared to summer sea ice retreat. What's remarkable is that we've witnessed sea ice reduction at six percent per year over just the last two winters, most likely a result of warming due to greenhouse gases."