Arctic sea ice has not only been shrinking in surface area in recent years, it’s also becoming younger and thinner. In this animation showing the fluctuations of sea ice between 2004-2016, Dr. Walt Meier of NASA Goddard Space Flight Center describes how Arctic sea ice has undergone fundamental changes during the era of satellite measurements and how ‘old ice’ is disappearing. For an updated version of this animation, visit the NASA website.
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