A closer look at the junction where a Greenland glacier crunches into the ocean floor, known as its grounding line, has revealed less stability amid the shifting of tides – and therefore a greater rate of melting – than previously estimated thanks...
Unlike the edge of ice shelves that extend above the ocean
Together with two of its neighbors, the Petermann Glacier forms the largest threat for rapid sea level rise from Greenland. Because they're grounded below sea level, most of their meltwater drains directly out into the ocean.
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