EGU Study Warns Models Understate 2100 Sea Level Rise by 3%-14% as Antarctic Ice Slumps
Updated
Updated · Futura · Jul 2
EGU Study Warns Models Understate 2100 Sea Level Rise by 3%-14% as Antarctic Ice Slumps
3 articles · Updated · Futura · Jul 2
Summary
A new EGU-backed study says climate models may be understating ocean heat uptake and the resulting sea level rise by 3%-14% by 2100, with climate sensitivity also 3%-7% higher than commonly estimated.
The researchers tie that gap to an underestimated link between Antarctic sea ice, Southern Ocean cloud cover and deep-ocean heat transport, arguing many models start from a Southern Ocean that is too warm and too ice-poor.
Antarctic sea-ice extent is now 5.52 standard deviations below the 1991-2020 daily average—about 2.03 million square kilometers less ice than expected—and September 2025 logged the third-lowest maximum extent on record.
The study says stronger cloud feedbacks of 19%-31% could amplify warming, adding to risks from ocean expansion, marine heatwaves, stronger cyclones and disrupted fish stocks.
Because the ocean absorbs more than 90% of excess planetary heat and the Southern Ocean has taken roughly 70% of that since 1870, the findings imply faster global warming and a stronger case for cutting greenhouse-gas emissions.
With our best climate models underestimating Antarctic melt, what hidden climate triggers might we be missing entirely?
Antarctica's melt is accelerating beyond predictions. Are coastal cities prepared for a much faster sea-level rise than planned?
A new ocean mechanism is rapidly melting Antarctic ice from below. Is a tipping point for collapse now unavoidable?
Sea Level Rise Accelerating Faster Than Predicted: New Science Reveals Urgent Antarctic Threat and Global Risks
Overview
Recent observations from Antarctica in mid-2026 have intensified warnings about the pace of climate change, especially regarding ocean heat uptake and sea level rise. Antarctic sea ice is now seen as a critical indicator for how much heat the oceans will absorb this century, directly affecting global warming projections, sea level rise, and the chances of meeting climate targets. The ocean’s vastness means it heats up slowly, so changes unfold over time. However, the consistent record lows in Antarctic sea ice in recent years suggest the planet may be nearing a critical tipping point, highlighting the urgency for updated climate models and action.