Surface meltwater is draining to the base of East Antarctic glaciers, causing them to flow more quickly toward the ocean [1].
This mechanism suggests that warming temperatures may accelerate ice loss in regions previously thought to be more stable, potentially impacting global sea levels. If surface water can penetrate deep ice layers to reach the bedrock, the stability of the East Antarctic Ice Sheet could be more vulnerable than earlier models indicated.
Professor Shin Sugiyama and his research team at Hokkaido University led the study reported in June 2026 [1, 2]. The researchers focused on the dynamics of glaciers in East Antarctica, where they observed that meltwater does not simply remain on the surface [2, 3].
According to the findings, the meltwater travels from the surface down to the glacier base [1, 3]. Once this water reaches the bottom, it lubricates the interface between the ice and the underlying bed [1, 2]. This lubrication reduces friction, which allows the massive glaciers to slide more efficiently toward the coast [2, 3].
While Antarctica is often viewed as a monolithic block of ice, the East Antarctic region contains vast amounts of freshwater [2]. The discovery that surface melting can directly influence the speed of glacier movement provides a new variable for climate scientists tracking the rate of ice discharge into the sea [1, 3].
The study highlights a critical link between atmospheric warming, which creates the surface melt, and the physical movement of ice at the bedrock level [1, 2]. This process creates a feedback loop where increased surface melting leads to faster ice transport toward the ocean [1].
“Surface meltwater can drain to the base of Antarctic glaciers, causing them to flow faster toward the ocean”
The findings indicate that the East Antarctic Ice Sheet is susceptible to a process called 'basal lubrication.' By identifying a direct pathway for surface meltwater to reach the glacier bed, the research suggests that atmospheric warming has a more immediate mechanical impact on ice flow than previously understood, potentially shortening the timeline for ice mass loss in the region.
