Swiss glaciers melting at alarming rate due to heatwaves, second-earliest 'glacier loss day' on record

Swiss glaciers are facing an unprecedented crisis, with heatwaves accelerating ice melt to alarming levels. The head of Glacier Monitoring in Switzerland (GLAMOS) stated that the snow and ice accumulated over the past winter are projected to have completely melted by Monday, marking the second-earliest "glacier loss day" on record. This phenomenon signifies the point at which glaciers begin to shrink, with any further melting until October contributing to their overall reduction in size.

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We're just seeing enormous ablation, ice melt rates and snow melt rates all over the Alps.

Matthias Huss, chief of the GLAMOS network, described the situation as "enormous ablation, ice melt rates and snow melt rates all over the Alps." He noted that multiple Swiss weather stations have registered new all-time temperature records. Huss explained that while a single heatwave might not be catastrophic, the prolonged duration of extremely high temperatures is severely detrimental to the glaciers. He added that the current dire state is a result of a "combination of bad circumstances," including a winter with insufficient snowfall and dust deposition from the Sahara Desert in March.

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We are three months too early compared to a healthy state.

Huss drew a stark comparison to 2022, which was previously the most extreme year on record for glacial melt in the Alps. He noted that this year is "surprisingly similar" to 2022. Data indicates that glaciers have received 25% less snow replenishment compared to the 2010-2020 average, and a warm May caused the snowpack to disappear earlier. Once the reflective snow cover vanishes, the darker ice surface absorbs more solar radiation, creating a feedback loop that intensifies melting.

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The problem is rather that we have very high temperatures that last for a very long time.

While the full extent of this year's damage will be assessed in September, Huss confirmed that "very strong ice loss" is already evident. The melting glaciers are a critical concern, as they are a primary source of water for major European rivers like the Rhine and the Rhone. Huss recounted a recent visit to the Rhone Glacier, where he observed one meter of ice melt in just 10 days, a "very impressive" but grim testament to the heatwave's impact. He emphasized that the glaciers are currently three months ahead of a healthy state, highlighting the urgency of the situation.

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The very bad state of the glaciers at the moment is down to a combination of bad circumstances.