East Antarctica May Hold Its Ice Far Longer Than Feared — But Only Half the Story Is Good News
A Surprising Result From a 100,000-Year Simulation
Antarctica is the largest store of frozen water on Earth, and for years the headline about it has been simple: as the planet warms, its ice melts and sea levels rise. A new study published on 30 October 2026 in Nature Climate Change adds a twist. Under extreme, long-term warming, the East Antarctic Ice Sheet — the biggest of the continent's three main ice masses — stays surprisingly stable, even when global temperatures climb more than 10 degrees Celsius above pre-industrial levels.
That does not mean Antarctica is safe. The same study finds major ice loss from West Antarctica once warming passes about 2 degrees, and the complete disappearance of Greenland's ice sheet above about 6 degrees. The surprise is regional: one part of the frozen continent behaves very differently from the others, and the reason is not temperature alone. It is snowfall, clouds and wind.
The research comes from the IBS Center for Climate Physics at Pusan National University in South Korea. Lead author Yun Kyung-Sook and centre director Axel Timmermann ran a coupled climate and ice-sheet model, in which the atmosphere, the oceans and the ice sheets evolve together over 100,000 years, rather than having the weather prescribed from outside. That difference turns out to matter enormously.
Why Scientists Expected Worse
To understand why the result surprised researchers, it helps to picture Antarctica's geography. The continent holds roughly 60 percent of the world's fresh water locked up as ice, enough to raise global sea levels by about 58 metres if it all melted. It is not one uniform block, though. West Antarctica sits largely on bedrock below sea level, which makes it vulnerable to warm ocean water eating away at it from beneath. East Antarctica is mostly land-based, higher, colder and far larger — it holds about four-fifths of the continent's ice.
Snowfall, Clouds and Shifting Winds: The Stabilising Trio
So what protects East Antarctica in the simulation? Three linked effects, all driven by a warmer atmosphere. First, warmer air carries more moisture, and as the Southern Hemisphere's westerly winds shift poleward, much of it falls as snow over the high, cold interior — adding ice at the top that partly offsets losses at the edges. Second, greater cloud cover reflects sunlight, so less solar energy reaches the surface and melting is suppressed. Third, the shifting winds reshape how moisture and heat are distributed around the continent. As lead author Yun Kyung-Sook put it, "the long-term future of an ice sheet cannot be understood from temperature alone."
The contrast the team found is stark. Under the strongest warming in the simulation, the Antarctic Ice Sheet as a whole lost about 20 percent of its volume when these atmospheric effects were included. When the researchers switched those effects off — running the ice sheet against prescribed climate conditions, as simpler models do — the loss jumped to about 70 percent. That 50-percentage-point gap is the measure of how much the atmosphere's own response matters.
The Other Side of the Map: West Antarctica and Greenland
It would be a serious mistake to read this study as good news for coastlines. The same simulations show West Antarctica losing large amounts of ice once sustained warming passes about 2 degrees above pre-industrial levels. West Antarctica's marine-based ice sits on ground below sea level, so warm ocean water can melt its floating ice shelves from below, remove the buttress holding back the glaciers behind them, and let those glaciers flow faster into the sea — a process already visible in parts of West Antarctica today.
Greenland fares worse still in the long run. In the model it retreats progressively as warming rises and disappears completely above about 6 degrees. Greenland's ice holds roughly 7 metres of potential sea-level rise on its own, and its loss would reshape coastlines worldwide over thousands of years, even if the pace in any single century is gradual.
The study also warns that parts of East Antarctica are already retreating today. The interior's stability in the model does not cancel out losses at the margins, where ocean-driven melting attacks outlet glaciers. East Antarctica's resilience, in other words, is a statement about the deep interior over tens of thousands of years — not a promise that every East Antarctic glacier is safe now.
What This Does Not Mean
Because this finding is easy to misread, it is worth stating its limits plainly.
It is a model result, not a measurement. The simulations run for 100,000 years under idealised carbon dioxide levels, which is a way of probing the system's long-term behaviour, not a forecast for 2100. The authors themselves flag the model's relatively coarse spatial resolution: it cannot fully represent what happens beneath ice shelves or at individual glaciers, where much of the real action takes place. Higher-resolution simulations will be needed to test how the stabilising snowfall and cloud effects interact with regional ocean-driven melting.
It is also not a reason to relax about emissions. The study's own century-scale message is sobering. Related research published in Nature Geoscience in October 2026 found that Antarctica is very likely to keep losing ice through the end of this century even under the most ambitious low-emissions pathway, while lower emissions still clearly limit how much is lost by 2100. The long-term fate of East Antarctica's interior does not change the near-term reality for coastal cities, which face rising seas driven by West Antarctica, Greenland, mountain glaciers and the expansion of warming seawater itself.
Why the Modelling Method Matters
Beyond Antarctica, the study carries a methodological lesson that could ripple through climate science. For years, many ice-sheet projections have used prescribed climate forcing: researchers first ran a climate model, then fed its temperatures and snowfall into a separate ice-sheet model. That approach is practical, but it breaks the two-way conversation between ice and atmosphere. In reality, a shrinking or growing ice sheet changes the winds, the clouds and the snowfall above it, which in turn changes the ice.
Co-author Axel Timmermann argues that fully coupled climate and ice-sheet models are essential for estimating long-term climate instabilities and sea-level rise, because simplified forcing "may overlook regional processes that strongly influence whether an ice sheet retreats, stabilizes or survives." If that argument holds up, other long-term projections — for Greenland, for past ice ages, for the deep future — may need revisiting with the same coupled approach.
It also matters for how we talk about tipping points. A tipping point is often presented as a single temperature threshold: cross it, and collapse follows. This study suggests the picture is messier and more regional — West Antarctica near 2 degrees, Greenland near 6 degrees, and East Antarctica with no simple threshold at all in the range tested, because its stabilising feedbacks grow stronger as warming increases.
What It Means for Coastal Communities
For people living on low-lying coasts, the practical takeaway is unchanged: sea-level rise is a slow-moving, long-lasting problem, and today's emissions choices shape it for centuries. Warmer oceans expand, glaciers retreat, and ice sheets shed water — and those processes do not stop the moment emissions fall. Even if the world reached net-zero carbon dioxide around 2050, Antarctica would very likely still lose ice through 2100, according to the October Nature Geoscience analysis.
That long tail is why adaptation and emissions cuts have to happen together. Coastal defences, land-use planning and early-warning systems protect people against the rise already locked in, while cutting emissions limits how much worse it gets. The recent experience of storm surges arriving on top of higher seas shows why the two tracks matter: when Cyclone Arnab struck India's Andhra coast in late October 2026, it did so against a background of gradually rising sea levels that make every surge reach further inland than it would have a generation ago.
The Bigger Climate Picture
This study lands in a year when climate news has often been grim: record ocean warming, weakening carbon sinks and a string of extreme weather events. Against that background, a finding of unexpected resilience can feel like relief. Scientists caution against that reading. The 2026 climate report on Earth's vital signs showed many indicators still moving in the wrong direction, and the planet's cities are simultaneously dealing with their own local warming — our look at why cities trap extra heat explains how urban heat islands add several degrees to summer nights in built-up areas, on top of global warming.
The honest summary is therefore two-sided. The atmosphere can fight back in ways that simple models missed, and East Antarctica's deep interior may endure far longer than feared. At the same time, West Antarctica and Greenland are on trajectories that will raise seas for centuries, and the ocean-driven melting that matters most this century is not captured well by a coarse long-term model. Both halves are true, and policy needs to hold both at once.
What to Watch Next
Three things will test whether this result holds up. First, higher-resolution coupled simulations that can resolve individual ice shelves and outlet glaciers, and show whether snowfall gains in the interior really outweigh ocean-driven losses at the coast. Second, satellite observations of snowfall over East Antarctica's interior and of whether its margins are gaining or losing mass overall. Third, the next generation of sea-level projections, which will have to decide how much weight to give coupled-model results when advising governments on coastal planning.
If the finding survives those tests, textbooks will need a small rewrite: East Antarctica goes from "eventually doomed under extreme warming" to "remarkably stubborn, thanks to its own weather." That is a genuinely interesting scientific shift. It is not, however, a reprieve. The ice that matters most to people alive today — and to their children and grandchildren — is still melting, still raising seas, and still responding to choices made now.
The real lesson of this study may be humility. Ice sheets respond to snowfall and sunshine, to winds and ocean currents, to physics that plays out over millennia. Our models are finally starting to capture some of that conversation — and the first thing it tells us is that the story is more complicated, and more regional, than we thought. That complexity is no excuse for inaction. It is a reason to get the science right, and to act on what the science already tells us with confidence: the less we warm the planet, the less ice we lose, and the safer our coasts remain.
*Source: Yun Kyung-Sook et al., "Atmospheric stabilization of the East Antarctic ice sheet under warming", Nature Climate Change (30 October 2026), DOI: 10.1038/s41558-026-02791-x; Institute for Basic Science / Phys.org summary, 30 October 2026.*