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Scientists just got some ancient clues about future sea-level rise — and it’s bad news

The Washington Post · last updated

When the researchers first arrived at their field camp at Prudhoe Dome, atop the Greenland ice sheet, they felt they had been swallowed by a monster.

The mountain of ice in northwest Greenland was more than 50 miles wide and 1,600 feet tall. The temperature at its summit was well below 0 degrees Fahrenheit. The scientists’ experiment there — an unprecedented effort to extract bedrock from deep beneath the ice sheet — was routinely disrupted by howling winds and blizzards so dense they blocked the sun. It was hard to imagine that this formidable, frozen expanse could ever disappear.

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