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A new study released on 15 October 2026 warns that Antarctica’s Thwaites Glacier – dubbed the “Doomsday Glacier” – is far more dangerous than previously thought. Researchers found that if the glacier were to collapse completely, it could raise global sea levels by about 26 inches (65 cm), putting coastal populations worldwide at risk. Updated modeling shows warming ocean waters are eroding the glacier’s base faster than earlier estimates, potentially contributing an additional 1.2 inches (30 mm) of sea‑level rise by 2100 – effectively doubling prior projections.
The study’s authors, including Professor Eric Rignot of the University of California, attribute the revised forecasts to a more complete physics‑based model that better captures rapid ice loss. Satellite data, notably from the Finnish ICEYE constellation, revealed that warm water penetrates a large “grounding zone” beneath the glacier, accelerating melt. Their model now suggests a 60 % probability that Thwaites will lose its critical attachment to the Mouginot Ridge before the century’s end, a scenario that could trigger a cascade of further ice loss.
Why it matters: Thwaites is a key driver of West Antarctic Ice Sheet stability. Its accelerated disintegration would not only raise sea levels dramatically but also increase the risk of widespread coastal flooding, threatening billions of people and billions of dollars in infrastructure.
What to watch next: Scientists will closely monitor the grounding‑zone dynamics using high‑resolution satellite observations and autonomous ocean sensors. Upcoming field campaigns aim to map sub‑ice water flow and evaluate potential mitigation strategies, while climate models will be updated to reflect the heightened risk from Thwaites and other vulnerable Antarctic glaciers. [[1]]