Scientists Just Spotted Unnerving Melting Beneath the 'Doomsday Glacier'

upstart writes:

The enormous glacier is in trouble:

The Thwaites Glacier, an ice formation the size of Florida, can change the world. And the latest research shows that some of its most vulnerable spots are in greater danger than previously thought.

Thwaites holds a colossal amount of ice, enough to gradually raise sea levels by over two feet(Opens in a new tab), though its collapse in a heating climate could unleash many more feet from neighboring glaciers. The Antarctic glacier has destabilized, retreating back nearly nine miles since the 1990s. If much of it progressively melts in the coming decades and centuries, large swathes of coastal cities and populated areas around the globe could become submerged, and easily thrashed by storms. For this reason, scientists are now intensely researching where Thwaites is melting, and how fast it might melt. These are monumental questions for Earth's future denizens.

[...] "Thwaites is the one spot in Antarctica that has the potential to dump an enormous amount of water into the ocean over the next decades," Sridhar Anandakrishnan, a professor of glaciology at Penn State University, told Mashable in 2021.

That's why, for better or worse, Thwaites has earned the moniker "Doomsday Glacier." But, crucially, civilization is not inherently doomed, climate scientists emphasize. We are not hapless; we have energy choices that can limit the worst consequences of climate change.

The latest 2023 research, straight from the West Antarctic source, further shows how the glacier is melting. The critical point is beneath Thwaites' ice shelf, which is the end of the glacier that reaches over the ocean. Crucially, ice shelves ground themselves to the ocean floor, acting somewhat like "a cork in a bottle" to hold back the rest of colossal glaciers from flowing unimpeded into the sea. So if the ice shelf eventually goes, so can the glacier (though this process progresses from over many decades to centuries).

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