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  4. http://ocean.si.edu/holding-tank/shifting-baselines/ice-melt-iceland Ice Melt in Iceland
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Ice Melt in Iceland

On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
James Balog/Extreme Ice Survey

On average, Arctic sea ice has decreased by four percent per decade since the late 1970s. But at the same time, Antarctic ice has increased by 1 percent. Scientists are investigating why. More about climate change can be found in the climate change section.

Tags: Arctic Sea level Antarctic

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