Antarctica’s Thwaites Glacier, often called the “Doomsday Glacier,” is retreating, according to new research published in Nature Geoscience. Scientists tracking the glacier’s historical movement via seabed imprints found it once retreated at over 1.3 miles per year, a rate that could signal potential for future instability as it contacts warmer ocean currents.
Decoding the “Doomsday” Label and Its Scientific Basis
The moniker “Doomsday Glacier” was coined in 2017 by author Jeff Goodell, who has spent years documenting the region’s volatile geography. The name serves as a shorthand for the glacier’s role as a critical stabilizer for the West Antarctic Ice Sheet. As Goodell explained, the glacier acts as a “cork in a wine bottle that would hold back the entire West Antarctic Ice Sheet.” If that cork is removed, the resulting collapse would threaten the integrity of the broader ice sheet, which is currently losing mass at an accelerating rate.
The glacier’s importance is rooted in its massive catchment area and its position on a continental shelf that slopes inland, creating a basin that makes it particularly susceptible to rapid, irreversible ice loss.
New Findings from Seabed Imprints
While satellite data has provided a clear view of Thwaites’ movement over the last 30 years, researchers recently turned to the seabed to look further back. By analyzing imprints left by the glacier, the team identified a period about 100 years ago when the ice was retreating at more than 1.3 miles per year—a pace double that of the 2011–2019 period. This discovery offers a sobering reality check for climate models.
“Exactly how big a threat there is is unfortunately still difficult to answer — but the fact that we finally have a data point that the models can tie back to is an important part of the puzzle.”
Anna Wåhlin, a professor of physical oceanography at Sweden’s Gothenburg University, via NBC News
The data suggests that while current retreat rates are slower than they were a century ago, the glacier is now moving toward a deeper basin, which could trigger a faster, more sustained collapse. According to NBC News, Thwaites currently accounts for roughly 5 percent of Antarctica’s total contribution to global sea-level rise, but its total collapse could raise ocean levels by up to 2 feet.
The Logistics of Antarctic Field Research
Investigating Thwaites is a feat of extreme engineering. Researchers from the International Thwaites Glacier Collaboration (ITGC) have utilized significant funding to deploy advanced technology, including robotic submersibles and hot-water drills, to measure water temperature, salinity, and flow rates beneath the ice. As noted by The New Yorker, reaching the glacier requires constructing improvised airports and navigating ships through treacherous ice fields.
The goal of these missions is to provide engineers and modelers with the raw data necessary to predict the timeline of a “retreat event.” Researchers are particularly focused on the “marine ice sheet instability” theory, which describes how warm water intrusion into the deep basins beneath the glacier accelerates melting. This is not merely a theoretical exercise; it is an attempt to quantify the physical forces acting on the ice to refine global climate projections.
Potential Interventions and Future Uncertainty
As the scientific community grapples with the timeline—which could span anywhere from decades to a century—some have explored theoretical geoengineering solutions, such as underwater curtains to block warm water. While such projects could be highly costly, experts remain cautious about their feasibility. The primary consensus remains that reducing carbon pollution is the only
