NASA scientists are crisscrossing Greenland on a mission to track melting ice. Greenland has been melting faster in the last decade and this summer, it has seen two of the biggest melts on record since 2012.
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NASA is now closely studying the phenomenon in hopes of figuring out precisely how global warming is eating away at Greenland's ice, specifically, whether the melting is being caused more by –
warm air or
warm, salty seawater, some of it from North America's Gulf Stream.
If much of the damage is from the water, there's a lot higher potential for Greenland to melt more quickly than thought.
Water brings more heat to something frozen faster than air does. That's because 90% of the heat energy from climate change goes into the oceans.
And that means seas rising faster and coastal communities being inundated more.
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