Antarctica’s Ross Ice Shelf: Accidental Glider Dive Reveals 45 Years of Ocean Warming Driving Hidden Ice Loss of Up to 80 cm Annually

Karmactive Staff

Karmactive Staff

Photo Source: Stuart Rankin (CC BY-NC 2.0)

Photo Source: Stuart Rankin (CC BY-NC 2.0)

A surprising mishap with an underwater glider has given scientists an unprecedented glimpse beneath Antarctica’s Ross Ice Shelf, revealing alarming trends in ocean warming and ice loss over four decades.

Photo Source: Cedar (CC BY-NC 2.0)

Photo Source: Cedar (CC BY-NC 2.0)

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Photo Source: Glass Labs Inc

Photo Source: Glass Labs Inc

What did Marlin uncover during its accidental journey? A 50-meter-thick layer of warm water, just above freezing, infiltrating the ice shelf cavity—a significant threat to its stability.

Photo Source: Glass Labs Inc

Photo Source: Glass Labs Inc

Despite a seemingly minor temperature increase of just four thousandths of a degree per year, the impact has been profound: up to 80 cm of ice loss annually, with decades of data backing the trend.

Photo Source: GRID-Arendal (CC BY-NC-SA 2.0)

Photo Source: GRID-Arendal (CC BY-NC-SA 2.0)

Could wind-driven ocean currents be the culprit? These Ekman currents push warm surface water under the ice shelf, driving melting at the base and exacerbating the ice loss.

Photo Source: Glass Labs Inc

Photo Source: Glass Labs Inc

Experts warn that the rate of ice melt may increase dramatically in the coming years as climate change accelerates ocean warming, further destabilizing Antarctica's crucial ice shelves.

Photo Source: Su Yin Khoo (CC BY-NC-SA 2.0)

Photo Source: Su Yin Khoo (CC BY-NC-SA 2.0)

Researchers predict that continued warming could lead to an accelerated flow of land ice into the ocean, raising global sea levels and threatening coastal cities.

Photo Source: CHRISTIAN PFEIFER

Photo Source: CHRISTIAN PFEIFER

This is the first-ever multi-decadal study of surface-water intrusion beneath the Ross Ice Shelf, making the data invaluable for predicting the future of Antarctica’s ice sheet and its global impact.

Photo Source: Goulit

Photo Source: Goulit

As climate models evolve, it’s clear that the intrusion of warm water beneath ice shelves is a crucial factor that must be accounted for when forecasting Antarctic ice loss and sea-level rise.

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