The press is once again ramping up the scare factor, pushing the claim that Antarctica’s Thwaites Glacier, the so-called “doomsday glacier,” is on the brink of collapse and poised to flood the world’s coasts. That claim is false. It’s been false since 1989 when a U.N. official told the Associated Press that “…entire nations could be wiped off the face of the Earth by rising sea levels if the global warming trend is not reversed by the year 2000.”

Advertisement

Yes, the glacier is retreating. Yes, scientists are studying it intensively. But retreating is not the same as collapsing. And collapse is not an indication of imminent global catastrophe. The leap from measured ice loss to headlines predicting coastal doom is driven more by modeling scenarios and dramatic language than by actual observed data.

The Thwaites Glacier contains on the order of 600,000 gigatons of ice. News reports often highlight projected losses measured in the hundreds of gigatons and present those figures as though they signal looming collapse. They do not. Even 200 gigatons of loss over decades represents a tiny fraction of the glacier’s total mass. Context matters even though it is routinely omitted in these climate scare stories.

The underlying science is far more nuanced than the headlines suggest. The International Thwaites Glacier Collaboration has deployed instruments beneath the floating ice shelf and directly measured relatively warm Circumpolar Deep-Water intruding under the glacier. That subsurface ocean water, roughly 1 degree Celsius above freezing, melts the ice from below. This is an ocean circulation issue. It is not primarily an atmospheric warming story.

That distinction is rarely made clear.

Ocean-driven basal melting has been part of Antarctica’s dynamic system for millennia. Ice shelves thin and retreat. Grounding lines migrate. These processes are influenced by ocean currents, salinity, wind patterns, and bedrock topography. They are complex and regionally variable. They do not operate on cable TV news timelines.

Advertisement

What turns a real scientific issue into a political scare campaign is the reliance on worst-case modeling scenarios. Ice-sheet models include assumptions about marine ice-cliff instability and hydrofracturing. Small changes in those parameters can produce very different projections for future sea-level rise. The most dramatic multi-meter outcomes depend heavily on those assumptions.

But models are not the same as measurements.

Observed thinning and retreat are real. But projecting full structural collapse within a year or even a few decades requires climate model extrapolation beyond what has been directly observed. The difference between continued retreat and irreversible disintegration is enormous, and it is often blurred in media coverage.

Antarctic ice trends also vary significantly by region. While parts of West Antarctica have lost mass in recent decades, other regions, including portions of East Antarctica, have shown periods of stability or gains depending on the time frame examined. The continent is not behaving like a single uniform block of melting ice.

Moreover, sea-level rise is gradual. Tide gauge and satellite altimetry data show global sea level rising millimeters per year, not meters per decade. Even under higher-end projections, significant contributions from Antarctica would unfold over many decades, if not centuries. Coastal adaptation is not only possible but already ongoing in many parts of the world.

Advertisement

None of this means Thwaites should be ignored. It is an important glacier in a sensitive marine setting. Continued observation is essential. But scientific caution should not be replaced by tabloid-level certainty.

There is also a broader pattern at work. Over the past decade, Antarctic ice projections have oscillated between claims of imminent collapse and revised assessments that dial back timelines as new data emerge. In fact, 77 percent of Antarctic ice shelves are stable. Each new study generates headlines about tipping points and points of no return. Then, follow-up research introduces nuance. The headlines rarely get corrected with equal prominence.

The phrase “doomsday glacier” is itself a marketing device for climate alarmism. It suggests inevitability and finality. Science does not operate in absolutes. It operates in probabilities and uncertainty ranges.

Public policy should be grounded in observed trends and realistic projections, not worst-case modeling presented as a foregone conclusion. Coastal cities have dealt with subsidence, storms, and gradual sea-level rise for centuries. Engineering solutions exist. Adaptation strategies exist, and panic is not a strategy.

When the press declares that Thwaites is about to collapse and drown the coasts, it is not reporting measured inevitability. It is amplifying the outer edge of worst-case climate model scenarios, which have now been retracted, and treating them as near-term certainties.

Advertisement

Antarctica’s glaciers deserve monitoring and scientific study. They do not deserve to be turned into tabloid-style seasonal scare stories.

Anthony Watts ([email protected]) is a senior fellow at The Heartland Institute.