Antarctica’s ice may be giving way from below, and scientists say the threat looks more serious than many forecasts assume.

Researchers have identified deep channels beneath floating ice shelves that appear to funnel and trap warmer ocean water, sharply increasing melt rates from the underside. That matters because ice shelves act like braces for the glaciers behind them. When they thin and weaken, inland ice can move faster toward the sea, adding to global sea level rise.

Scientists warn that a hidden process beneath Antarctic ice shelves may already be accelerating melt faster than current models capture.

The warning carries extra weight because it reaches beyond the parts of Antarctica long viewed as most exposed. Reports indicate even sections of East Antarctica, often treated as relatively stable in public discussion and some planning scenarios, may face greater risk than previously understood. If that holds up, one of the world’s largest ice reserves could prove more vulnerable to ocean-driven change than expected.

Key Facts

  • Scientists found deep channels beneath Antarctic floating ice shelves.
  • Those channels appear to trap warmer ocean water and speed melting from below.
  • Researchers say current climate models may not fully capture this process.
  • Even parts of East Antarctica may be more vulnerable than once believed.

The finding also points to a problem in how the world measures future risk. If major climate models miss or understate this under-ice process, projections for sea level rise could come in too low. That would ripple far beyond polar science, affecting coastal planning, infrastructure design, insurance exposure, and the timelines governments use to prepare for rising water.

What happens next will depend on how quickly researchers can confirm the scale of the process and fold it into the models that guide policy. The stakes reach every coastline: if Antarctica responds faster to warming oceans than expected, the window to adapt narrows, and decisions made now about emissions and resilience grow even more consequential.