A Swiss Academy of Sciences panel is reporting a dramatic acceleration of glacier melt in the Alpine country, which has lost 10% of its ice volume in just two years after high summer heat and low snow volumes in winter.

Switzerland — home to the most glaciers of any country in Europe — has seen 4% of its total glacier volume disappear in 2023, the second-biggest decline in a single year on top of a 6% drop in 2022, the biggest thaw since measurements began, the academy’s commission for cryosphere observation said.

Experts at the GLAMOS glacier monitoring center have been on the lookout for a possible extreme melt this year amid early warning signs about the country’s estimated 1,400 glaciers, a number that is now dwindling.

“The acceleration is dramatic, with as much ice being lost in only two years as was the case between 1960 and 1990,” the academy said. “The two extreme consecutive years have led to glacier tongues collapsing and the disappearance of many smaller glaciers.”