twice as fast as forty years ago
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Scientists have identified a turning point they call peak glacier extinction.
New modelling shows up to 4,000 glaciers could vanish annually between 2041 and 2055.
The trajectory hinges on how much further global temperatures rise.[1]
Australia holds a direct stake despite lacking mainland glaciers of its own. Its remote sub-Antarctic territory, Heard Island, shows some of the clearest evidence of accelerating ice loss anywhere.
That evidence exposes gaps in how Canberra tracks and funds Antarctic science.
Researchers led by glaciologist Lander Van Tricht examined more than 200,000 glaciers using three independent global models.
They tested four warming scenarios ranging from 1.5°C through to 4.0°C above pre-industrial levels. Their findings mark the first global assessment of individual glacier disappearance.[1]
Under strict climate action, annual losses would peak near 2,000 glaciers by 2041. Under a high warming pathway, that figure could double to roughly 4,000 glaciers a year. That peak would arrive later too, around the mid-2050s.[1]
By 2100, the world could lose between half and more than 90 per cent of its glaciers. The gap between those outcomes rests entirely on decisions governments make today. Every fraction of a degree avoided preserves measurably more ice.[1]
One Swiss glacier, Bella Tola, was formally declared extinct in August 2026. Its disappearance landed squarely inside the extinction window the modelling had predicted. Researchers say such cases confirm the projections are already becoming reality.[6]
Small, low-latitude glaciers face the earliest extinction under every warming scenario studied. More than half the ice across the European Alps, the Caucasus and the Rocky Mountains could disappear within two decades. Parts of the Subtropical Andes and African ranges face a similarly rapid timeline.[1]
Under the highest warming scenario, the European Alps could shed their entire glacier population within a single peak year. As few as 20 glaciers may remain there by 2100. Larger ice masses in Greenland and Antarctica face their worst losses much later.[1]
Australia's own territory of Heard Island tells a parallel story of accelerating retreat. Glacier cover there fell by roughly 23 per cent between 1947 and 2019. Losses have almost doubled in pace since 1988, driven by warming in the Southern Ocean.[2]
Monash University researchers mapped the retreat of Stephenson Glacier, whose collapsing terminus carved out a new coastal lagoon. Scientists plan to sail aboard the icebreaker RSV Nuyina later this year. They aim to study newly exposed bedrock as part of the Australian Antarctic Program.[3]
Mountain glaciers are known as water towers because they store winter snow and release it gradually. Almost two billion people rely on that regulated flow for irrigation, drinking water and hydropower. Losing it would upend food and energy systems across entire regions.[7]
In the short term, faster melting boosts river flows and can trigger sudden flooding downstream. Once the underlying ice runs low, however, that seasonal buffer collapses into scarcity. Communities then face longer, harsher dry seasons with far less warning.[5]
The Himalayan region, often called the Third Pole, is losing roughly a tenth of its ice mass each decade. Hydropower schemes across South and Southeast Asia depend heavily on the meltwater those glaciers currently supply. Rivers including the Ganges, Indus and Brahmaputra all originate there.[7]
Australian trade and aid programs reach deep into these water insecure regions across Asia and the Pacific. Instability in glacier fed river basins carries flow-on consequences for regional food security. It also raises pressure for climate driven migration in coming decades.
Ocean warming remains the largest driver of global sea level rise, but glacier melt now ranks a close second. Since 2000, vanishing glaciers have added 18 millimetres to sea levels worldwide. That contribution is accelerating rather than levelling off.[5]
Every additional millimetre exposes roughly 200,000 to 300,000 more people to annual coastal flooding globally. Low lying communities across the Pacific face that risk most directly and most urgently. Many have contributed almost nothing to the emissions driving the melt.[5]
Glaciers thousands of kilometres from any coastline still raise water levels lapping at Australian shores. Sydney, Brisbane and Pacific neighbours all share that exposure regardless of their distance from the ice. Coastal infrastructure planning rarely accounts for this distant, compounding contribution.
Canberra's climate diplomacy across the Pacific rests on managing precisely this kind of slow, cumulative risk. Glacier extinction adds a further, largely unacknowledged pressure to that already difficult diplomatic task. Pacific leaders have repeatedly urged Australia to treat the threat as urgent.
Retreating ice destabilises mountain terrain, raising the frequency of rockfalls and permafrost collapses. Meltwater pooling behind loose debris can trigger sudden glacial lake outburst floods downstream. Valley communities below these unstable slopes often receive little formal warning.[5]
Roughly one third of glaciers inside protected UNESCO World Heritage sites are projected to vanish entirely by 2050. Mount Kilimanjaro remains among the most frequently cited examples worldwide. Its disappearance would end a landmark visible for generations across East Africa.[1]
Heard Island itself carries UNESCO World Heritage status, prized for ecosystems still largely free of introduced species. Glacier retreat is now connecting once isolated habitats across the island's coastline. That shift favours generalist species over the specialists long adapted to isolation.[8]
Australia funds Antarctic research through periodically reviewed programs rather than dedicated, long term glacier monitoring. Scientists argue that gap leaves the nation's own vanishing ice poorly tracked and poorly resourced. Sustained funding, they say, would close a clear accountability shortfall.
Peak glacier extinction is no longer a distant projection confined to modelling papers. It is unfolding now, on Swiss slopes and on Australia's own sub-Antarctic territory alike.
Heard Island demonstrates that Australia cannot treat glacier loss as someone else's problem to manage. Its water towers, coastlines and Pacific neighbours all sit downstream of decisions made in distant capitals.
Stronger Antarctic monitoring, sustained research funding and ambitious emissions policy would each narrow that gap further. The outcomes still available this century remain a matter of political choice rather than fixed destiny. Australia's response now will shape how much of its own ice, and its neighbours' coastlines, survives the decades ahead.
References
1. Peak glacier extinction in the mid-twenty-first century. The Nature Climate Change study by Van Tricht and colleagues projecting global glacier loss through 2100.
2. Australian scientists record accelerating glacier loss on sub-Antarctic Heard Island. ABC News reporting on the 23 per cent decline in Heard Island's glacier cover.
3. Global warming reaches Earth's edge: Heard Island glaciers retreat by 23%. Monash University's Lens publication detailing SAEF research and the planned RSV Nuyina voyage.
4. New maps show Heard Island glaciers are retreating faster. The SAEF research centre's account of new glacier mapping and fieldwork plans.
5. Glacier melt will unleash avalanche of cascading impacts. World Meteorological Organization findings on sea level rise, water towers and glacial hazards.
6. When will your glacier disappear? New website lets users explore risks worldwide. Coverage of the Glacier Extinction Explorer platform and the Bella Tola glacier's confirmed extinction.
7. Melting Glaciers and Ice Caps: Water Security Threats and Rising Seas. An overview of Himalayan water tower dynamics and downstream population exposure.
8. Landforms of Heard Island and McDonald Islands. The Australian Antarctic Division's account of glacier retreat and ecological change on Heard Island.