Why Are Researchers Covering a Glacier With Wool?
Synthetic tarpaulins and geotextiles have been used in Switzerland for years to protect limited areas of snow and ice during the warmer months.
- By reflecting sunlight and reducing the heat reaching the ice surface, these coverings can slow local melting, particularly at ski resorts and other tourism-related sites.
The problem is that many of these protective sheets are made from plastic and can shed microfibres into the environment.
- Sheep’s wool offers a potentially more biodegradable alternative.
- Project manager Timothee Steiner said the project also aims to find a use for the 40-70% of Swiss wool that is discarded each year.
- Four university master’s students developed the idea before it was turned into a field experiment.
- Swiss manufacturer Fisolan produced the prototype blankets used in the trial.
Also Read: G20 Carbon Emissions Could Fall 20% With More Carpooling, Buses And Hybrid Work
Wool Performs Surprisingly Well in First Tests
Researchers installed the two wool prototypes on the Tsanfleuron Glacier in June and have been comparing their performance with conventional synthetic coverings throughout the summer. Measurements have been taken every two weeks to track how effectively each material limits ice loss.
According to project manager Steiner, the wool blankets reduced melting about as effectively as the conventional coverings, with the thicker wool prototype performing slightly better in the measurements conducted so far.
The physical durability of the material also surprised researchers. Fisolan’s Niklaus Saegesser said he initially expected the wool to be insufficiently stable, while student Elliot Gaffiot described the results as unexpectedly strong.
Experiment detail |
Current information |
|---|---|
Glacier |
Tsanfleuron Glacier, western Switzerland |
Wool-covered area |
200 sq m |
Wool prototypes |
2 |
Testing period |
From June through summer |
Comparison |
Synthetic geotextiles |
Measurement interval |
Every 2 weeks |
Early result |
Wool performed about as well as conventional coverings |
Wool discarded in Switzerland |
40-70% |
Also Read: Wildfires And Heatwaves Threaten Global Air Quality, WMO Warns
A Local Solution, Not a Cure for Glacier Loss
The Swiss glacier gets covered in sheep’s wool blankets experiment should not be interpreted as evidence that wool could stop glaciers from disappearing. Protective coverings are only practical across very small areas. At present, roughly 0.02% of Switzerland’s glacier surface is covered by protective sheets.
🔊 Could sheep save the Alps? Swiss scientists test wool blankets on glaciers and early results show they work just as well as plastic covers. Listen to the Reuters World News podcast for more https://t.co/z0u83qIHdO pic.twitter.com/Hb3zP6WftP
— Reuters (@Reuters) September 7, 2026
That makes the potential application much narrower but still useful. If further testing confirms the results, wool could eventually replace some plastic coverings already used around ski pistes, tourism facilities and snow-management sites, reducing reliance on synthetic materials and giving discarded Swiss wool a productive use.
For the much larger problem of glacier retreat, however, no blanket can provide a long-term solution. Scientists continue to point to rising global temperatures and greenhouse-gas emissions as the fundamental drivers of ice loss. The wool experiment may offer a cleaner way to protect selected patches of ice, but slowing widespread glacier disappearance ultimately depends on reducing emissions.
Also Read: 400 Million Farmers Face Pesticide Poisoning Every Year, Study Finds
0 Comments