Mathieu Morlighem is the Evans Family Distinguished Professor of Earth Sciences at Dartmouth College. His research group focuses on the physics of glacier ice and the role of the ice sheets in the climate system.
Antarctica's Thwaites Glacier got its nickname the"Doomsday Glacier" for its potential to flood coastlines around the world if it collapsed. It is already contributing about 4% of annual sea-level rise as it loses ice, and one theory suggests the glacier could soon begin to collapse into the ocean like a row of dominoes.
By submitting your information you agree to the Terms & Conditions and Privacy Policy and are aged 16 or over.Thwaites Glacier holds enough ice to raise global sea level by more than 2 feet . Once Thwaites starts to destabilize, it also will destabilize neighboring glaciers. So, what happens to Thwaites affects all of the West Antarctic Ice Sheet, and that affects sea-level rise along coastlines everywhere.
Once that happens, a new ice cliff farther back would be exposed, and the new cliff would be even taller because it is farther inland. The theory of marine ice cliff instability suggests that if the cliffs collapse quickly enough, that could have a domino effect of ever-higher ice cliffs collapsing one after the other.
We used three high-resolution models to explore what this new physical understanding of ice cliff instability would mean for Thwaites Glacier this century.
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