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Earth from space: Massive blue 'melt pond' in Arctic glacier is an eerie sign of things to come

Live Science
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77% Informative

NASA 's ER-2 airplane took a photo of a large pool of water sitting on top of an Alaskan glacier.

The striking melt pond is around 2,300 feet ( 700 meters ) across at its widest point.

Similar melt ponds are becoming more common across the Arctic due to climate change.

The number of melt ponds that appear each summer is a good predictor of a year 's minimum sea ice extent.