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Environment
Jun 17, 2026
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The Wild Dream of Refreezing the Arctic: Real Ice's Geoengineering Breakthrough

AI Summary
A UK-funded startup, Real Ice, is testing a controversial geoengineering technique in Cambridge Bay, Canada, by pumping seawater onto sea ice to artificially thicken it. Early results show a 50cm increase in thickness and a brighter surface that could extend the ice's lifespan by a week, offering a potential, albeit small-scale, countermeasure against the accelerating loss of Arctic sea ice.

‘This would have been a wild dream a year ago,’ says Andrea Ceccolini, standing on Arctic sea ice just a 4-mile snowmobile ride from the Inuit town of Cambridge Bay, northern Canada. To his left are sky blue ponds of meltwater created by a sun that no longer sets in the high north summer. To his right, the sea ice is still a brilliant white, the light dusting of snow on top continuing to sparkle.

The difference is the result of a bold geoengineering experiment being conducted by Ceccolini’s company, Real Ice, funded by the UK government. Five months earlier, the team braved temperatures of -40C to drill holes and pump 50,000 tonnes of ocean water up on to the surface, which froze almost immediately, thickening the 1.5-metre-deep ice by about 50cm.

The Engineering of a Frozen Island

The team faced extreme conditions, including a wind chill of -63C, which kept them off the ice at times. They worked in temperatures of -40C, relying on Inuit guides to navigate whiteouts where visibility dropped to 10m. The operation involved running pumps for a total of 1,080 hours in January and February, icing over a square area approximately 450 metres on a side.

The process works by pumping seawater onto the ice, which turns the insulating snow layer into slush and then ice. This allows extreme cold to penetrate better, stimulating extra ice growth on the bottom. The team has refined this by pumping later in the winter to avoid excessive snow buildup and by performing two separate rounds of pumping.

Quantifying the Thickness Gain

  • Ice Thickness Increase: The experiment added 50cm of thickness this year, compared to 30cm last year.
  • Lifespan Extension: The added thickness could extend the lifespan of the ice by 7-10 days.
  • Vehicle Access: A pickup truck can drive over the 30cm of added ice.
  • Global Context: Summer sea ice has shrunk by about 40% in the last 45 years.

While a 50cm gain may seem modest, the results are visible from space. Satellite images show the test area emerging as an island of white in a sea of blue a few days after the melt season began. The team also discovered a bonus effect: the artificial ice is brighter and more reflective than the surrounding natural ice due to air bubbles trapping light, a phenomenon known as the albedo effect.

The Albedo Effect and Climate Feedback Loops

The experiment addresses a critical climate feedback loop: ice reflects 70% of the sun’s heat back into space, while open ocean reflects just 7%. As the ice melts, it exposes darker water, which absorbs more heat, leading to further melting. The Real Ice project aims to counteract this by maintaining a bright surface that reflects solar radiation.

Despite the success, scientists worry that the Arctic could reach catastrophic and irreversible tipping points as early as the 2030s. The Real Ice team is currently measuring the ice's reflectivity and biological impact, using drones to record the area down to 5cm resolution.

From Niche Experiment to Global Mitigation?

The success of this pilot suggests that localized geoengineering could play a role in preserving Arctic sea ice. However, the challenge lies in scaling the technology to cover vast areas of the Arctic Ocean. The team’s ability to pump seawater using small pumps—requiring less power than a toaster—offers hope for future scalability. As the climate crisis accelerates, experiments like Real Ice’s may move from scientific curiosity to essential tools for climate mitigation.