File - This handout photo provided by The National Oceanic and Atmospheric Administration (NOAA) shows Arctic sea ice in 2013.(AP Photo/NOAA)
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The Arctic isn't nearly as bright and white as it used to be because of more ice melting in the ocean, and that's turning out to be a global problem, a new study says.Snow-covered ice reflects several times more heat than dark, open ocean, which replaces the ice when it melts, Eisenman said.As more summer sunlight dumps into the ocean, the water gets warmer, and it takes longer for ice to form again in the fall, Jason Box of the Geological Survey of Denmark and Greenland said in an email. Box and University of Colorado ice scientist Waleed Abdalati, not part of the study, called the work important in understanding how much heat is trapped on Earth.
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