The Thwaites Glacier in West Antarctica, often called the 'Doomsday Glacier,' is undergoing a rapid and dramatic breakup, according to satellite observations and glaciologists. Once a stable ice shelf buttressing the West Antarctic Ice Sheet, Thwaites now shows massive fractures and a flow rate that has more than tripled since 2020, reaching over 2,000 meters per year. Scientists describe the ice shelf as being in 'free fall,' with its collapse expected to trigger broader destabilization of the West Antarctic Ice Sheet, which holds enough ice to raise global sea levels by up to 3.3 meters (over 10 feet).

The collapse of Thwaites is driven by warming ocean waters rising from depth, melting the glacier from below, combined with atmospheric warming and extreme temperature anomalies across Antarctica. In recent winters, parts of East Antarctica have seen temperatures soar 40°C above average due to distorted polar vortices and atmospheric rivers. Since 2015, Antarctic sea ice has declined sharply, with 2023 recording a winter extent so low it was statistically a one-in-3.5 million chance event.

While the exact timeline of sea level rise remains uncertain—estimates range from one to over four meters by 2100—scientists agree the glacier is deteriorating faster than models predicted. At the same time, U.S. federal funding for polar science is being cut by up to 70%, including the termination of the lease on the only American Antarctic research icebreaker, limiting scientists’ ability to monitor these changes firsthand.