Satellites Detect Warm Seawater Surging 6 Kilometers Under Thwaites Glacier as Tides Accelerate Melt
Updated
Updated · ecoportal.net · Jul 2
Satellites Detect Warm Seawater Surging 6 Kilometers Under Thwaites Glacier as Tides Accelerate Melt
2 articles · Updated · ecoportal.net · Jul 2
Summary
High-resolution satellite radar tracked warm, high-pressure seawater moving 2 to 6 kilometers beneath Thwaites Glacier’s grounding zone, with spring tides pushing intrusions another 6 kilometers inland.
Tidal lifting lets the glacier bob upward and open space for Southern Ocean water to flow under grounded ice, delivering enough heat to melt meters from the underside each year.
The findings challenge models that treated the grounding line as a sharp, fixed boundary with little or no melt, and a 2025 follow-up found sea-level projections rise when this hidden melt zone is included.
Thwaites already accounts for about 4% of global sea-level rise and holds enough ice to raise oceans by more than 2 feet; as a buttress for West Antarctica, its full collapse could eventually add around 10 feet.
The result sharpens concern that ice loss is being underestimated even as the $50 million International Thwaites Glacier Collaboration says full collapse this century is unlikely but long-term retreat is already locked in.
Beyond rising seas, how will the collapse of Thwaites Glacier disrupt global weather and ocean life?
A hidden ocean is melting Thwaites from below. Are other glaciers hiding the same catastrophic threat?
As the Doomsday Glacier’s melt becomes unstoppable, what radical solutions could protect our coastal cities?
The Doomsday Glacier: Thwaites’ Rapid Melting, Sea-Level Threats, and Global Adaptation Strategies
Overview
Thwaites Glacier, the most unstable region in Antarctica, is losing ice at an alarming rate—about 75 billion tons each year, which is nearly half of all Antarctic ice loss. This rapid melting is mainly caused by warm ocean water attacking the glacier’s base where it meets the sea, speeding up its disintegration. Scientists worry that the true rate of change may be underestimated, raising the risk of faster sea-level rise worldwide. Understanding and monitoring these processes is crucial, as Thwaites Glacier holds enough ice to raise global sea levels by 60 centimeters, threatening coastal communities everywhere.