Arctic Sea Ice Experiment Thickens Ice by 12.6 Inches, Brightening Surface and Slowing Melt
Updated
Updated · Livescience.com · Jul 6
Arctic Sea Ice Experiment Thickens Ice by 12.6 Inches, Brightening Surface and Slowing Melt
3 articles · Updated · Livescience.com · Jul 6
Summary
Field tests in Cambridge Bay, Nunavut, found pumping seawater onto winter sea ice made treated areas up to 12.6 inches thicker than untreated sites by spring.
Eight test plots flooded once or twice during winter 2024-25 stayed brighter and melted more slowly into late summer, with twice-flooded areas gaining the most ice.
Researchers said the added layer forms as seawater saturates snow and freezes, while reduced snow insulation lets colder air accelerate natural ice growth from below.
The result suggests a relatively simple local adaptation tool that could help Arctic travel, hunting and coastal protection, while boosting reflectivity and regional cooling.
Scaling remains the main obstacle: earlier estimates said 10 million wind-powered pumps would cover only 10% of the Arctic Ocean, and ecological, governance and cost concerns are unresolved.
As Arctic ice vanishes, is pumping seawater a vital local solution or a dangerous geoengineering gamble with unknown consequences?
Does this ice-thickening success risk distracting from the urgent need to cut global carbon emissions, the root cause of the melt?
Artificial Arctic Sea Ice Thickening: Field Trials, Feasibility, and the Urgent Debate Over Geoengineering’s Role in Climate Adaptation
Overview
Recent field experiments in 2024–2025 tested pumping seawater onto Arctic sea ice to make it thicker and help it survive longer into the summer. The Canadian Real Ice project showed that flooding snow-covered ice increased thickness, as snow’s insulation let more cold reach the ice below. However, the Norwegian Arctic Reflections trial found that emissions from pumps and vehicles could cancel out the cooling benefits. These efforts respond to rapid Arctic warming, which is causing sea ice loss, permafrost thaw, and threats to local communities and ecosystems. While thickening ice may temporarily slow these impacts, practical, environmental, and social challenges remain significant.