Swiss glaciers shrank by 5.5 percent during the first eight months of the year, according to a study published on October 3 by the glaciology monitoring institute Glamos and reported by nrk.no. The accelerating ice loss over the past five years has erased nearly 20 percent of Switzerland’s glaciers.
Record Summer Temperatures Drive Extreme Melt
The severe ice loss follows a winter marked by low snowfall and a summer that Meteoswiss confirmed as the hottest since records began in 1864. Summer temperatures averaged 17.2 degrees Celsius, surpassing the previous record of 16.9 degrees from the summer of 2003. Basel recorded the highest temperature of the season at 39.7 degrees Celsius on July 30. Matthias Huss, director of Glamos and a glacier researcher, told Reuters that the country is entering a new reality where glaciers continuously vanish during extreme annual warm periods. Early heatwaves in May and June stripped away winter snow cover prematurely, exposing darker underlying ice that absorbs more solar radiation and accelerates melting.
Loss of 2.2 Trillion Liters of Water
Researchers estimate that Swiss glaciers lost 2.2 trillion liters of water between July and September. Matthias Huss noted to Reuters that the Aletschbreen, the largest glacier in Switzerland and a designated Unesco World Heritage site, has never experienced melting on this scale. Scientists working at altitudes up to 3,500 meters have encountered entirely snow-free glacier surfaces. On the Tsanfleuron glacier, which spans elevations from 2,500 to over 3,000 meters, researchers measured four-meter ice losses at its highest point where thick winter snowpacks should normally remain at this time of year. In response to the rapid retreat, workers have placed synthetic blankets over sections of the Tsanfleuron snow to shield it from direct sunlight.
Did you know?
Researchers frequently observe glaciers collapsing from the inside out due to underground water streams. These internal dynamics carve massive cavities through the ice, resembling the holes in Swiss cheese and causing the structures to break apart from within at an accelerated pace.
Meteoswiss Tracks Continuous Temperature Records Starting from Eighteen Sixty Four
When did systematic temperature measurements begin in Switzerland?
Meteoswiss has maintained continuous temperature records across the country since 1864.
Which specific Swiss glacier is the largest?
The Aletschbreen holds the distinction of being the largest glacier in Switzerland and is recognized as a Unesco World Heritage site.
What was the highest temperature recorded during the summer?
Basel reached 39.7 degrees Celsius on July 30, marking the peak temperature of the season.
Internal Cavities Accelerate Glacier Collapse
Internal structural failures are compounding surface melting as meltwater carves channels beneath the ice. Matthias Huss told The Guardian that these underground water streams create large holes inside the glaciers, comparing the compromised structures to a Swiss cheese. These internal processes tear the ice apart and force glaciers to retreat even faster. Huss emphasized that these transformations, alongside global heatwaves and droughts, are driven directly by human-induced climate change.
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