Scientists Warn Thwaites Glacier Could Collapse and Raise Sea Levels in Antarctica

A chilling warning has emerged from the icy expanses of Antarctica.

Scientists are now predicting that the Thwaites Glacier, ominously nicknamed the Doomsday Glacier, could accelerate its ice loss far faster than previously thought, potentially destabilizing the West Antarctic Ice Sheet and contributing significantly to global sea level rise.

Recent research from the University of Edinburgh indicates that by 2067, Thwaites could shed an eye-watering 200 gigatonnes of ice every year—surpassing the current annual loss of 150 gigatonnes from the entire Antarctic Ice Sheet.

A Glacier the Size of a Country

Thwaites Glacier is enormous, roughly the size of the UK, with ice up to 4,000 metres thick in places.

It functions like a vast river of ice, draining the surrounding West Antarctic Ice Sheet into the Amundsen Sea.

If this glacier were to collapse entirely, sea levels worldwide could rise by around 65 centimetres—enough to flood low-lying coastal cities and displace millions of people.

Dr Daniel Goldberg, the lead author of the study, told reporters that while a full collapse isn’t imminent, the glacier is moving toward a dangerous tipping point.

“That rate of 200 gigatonnes per year could increase quite quickly, and that instability could lead to collapse,” he said.

The Science Behind the Predictions

Researchers used a satellite-calibrated ice sheet model to project the glacier’s future.

This computer simulation accounted for ice flow physics, melting from ocean waters, and surface conditions, and was carefully matched to real-world observations.

Interestingly, models based on elevation changes revealed that Thwaites may be losing ice even faster than velocity-based simulations had suggested.

The most rapid melting appears to occur over deep troughs in the Antarctic bedrock, stretching up to 100 kilometres inland.

While climate change warming the Amundsen Sea plays a role, the glacier’s underlying geology could be amplifying its retreat.

What Makes the Doomsday Glacier So Dangerous

Thwaites isn’t just large—it’s also highly unstable.

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Its interior lies more than two kilometres below sea level, while the ice at its edge is much shallower.

Satellite data shows that the glacier has been accelerating since the 1970s, with the grounding line retreating nearly 14 kilometres between 1992 and 2011.

Ice discharge has increased by 77 percent since 1973.

Because Thwaites connects to the wider West Antarctic Ice Sheet, its collapse could trigger a chain reaction, unlocking far more ice and raising sea levels by one to two metres—or potentially even higher if the broader ice sheet follows.

Impact and Consequences

• Global sea levels could rise by 65 centimetres just from Thwaites, threatening coastal cities worldwide.

• Hundreds of millions of people could face displacement due to flooding of low-lying areas.

• Infrastructure, agriculture, and freshwater supplies could be severely affected.

• Rising seas may amplify storm surges, increasing the severity of natural disasters.

• Accelerated melting in Antarctica could destabilize other glaciers, contributing to further ice loss.

What’s Next?

Scientists warn that even aggressive emissions reductions today may take decades—or even centuries—to influence Thwaites’ behaviour.

The glacier responds slowly to climate changes, meaning any actions to curb warming may not be reflected in ice loss for generations.

Meanwhile, monitoring will continue using satellites and field studies to track flow speeds, ice thickness, and grounding line changes.

Researchers hope that this data will help predict potential tipping points more accurately and inform global strategies to manage rising sea levels.

Summary

The Thwaites Glacier, known as the Doomsday Glacier, is losing ice faster than anticipated and could dramatically affect global sea levels.

Although collapse isn’t immediate, its rapid acceleration and geological vulnerabilities make it a major concern.

Scientists stress that while reducing emissions can help, the effects of climate action may not be seen for many decades.

Key Takeaways

• Thwaites Glacier in Antarctica could lose 200 gigatonnes of ice annually by 2067, surpassing the entire Antarctic Ice Sheet’s current loss.

• Complete collapse could raise global sea levels by 65 centimetres, endangering millions of coastal residents.

• The glacier’s rapid melting is influenced by both warming seas and deep Antarctic bedrock troughs.

• Ice flow has accelerated dramatically since the 1970s, with significant grounding line retreat.

• Even with reduced emissions, Thwaites responds slowly, meaning effects of climate policies may take generations to materialize.