Mont Blanc, the highest mountain in Western Europe, has experienced a significant decrease in height, now measuring 4,807.47 meters above sea level. According to a team of surveyors, the peak has lost more than one meter in height over the past year due to climate change impacts in the Alps.
The mountain’s height fluctuates yearly, influenced by changing weather patterns that affect the thickness of the snow and ice cap. Recent measurements taken during an expedition last month indicated an increase of 1.88 meters compared to 2023, which marked one of the lowest levels in recorded history.
Authorized surveyors from the Union Nationale des Géomètres-Experts (UNGE) and the Ordre des Géomètres-Experts have been monitoring Mont Blanc since 2001, employing precise satellite technology alongside drones to create detailed models of the snow and ice cover.
Data reveals that the peak has diminished by 3.43 meters from its highest recorded elevation of 4,810.90 meters in 2007. Experts caution against conflating annual altitude fluctuations with the rapid loss of alpine ice attributed to fossil fuel pollution.
“It is crucial to differentiate between surface altitude changes and overall ice mass changes,” said a spokesperson for UNGE. “An increase in peak height does not necessarily indicate that the mountain has gained ice mass, nor does it contradict the documented retreat of alpine glaciers.”
The ongoing climate crisis has been a significant factor in this year’s record-breaking summer temperatures in Western Europe, severely impacting alpine regions and accelerating ice melt. Swiss glaciologists recently warned of an unprecedented “melting rate explosion,” confirming that one-fifth of the country’s ice has been lost over the last five years, with a 5.5% volume loss between 2025 and 2026.
Jean des Garets, president of the Haute-Savoie surveyors’ chamber and leader of the Mont Blanc expedition, noted visible warming trends throughout the alpine massif, although he remarked, “so far, climate change does not appear to have the same impact at altitudes above 4,000 meters.”
“When we climb, we pass by the Brigade Blanche hut before the Tête-Rousse glacier,” he said in a recent interview with French television TF1. “We have observed the glacier moving upward. It has literally melted before our eyes, and now, in some places, we cross a stream instead of a glacier,” added Jean des Garets.
