Swiss glaciers already losing ice as summer begins, scientists warn

Swiss glaciers are facing a critical juncture as they enter a period of net ice loss earlier than anticipated, even with summer barely underway. Scientists from the Federal Institute for Forest, Snow and Landscape Research (WSL) report that by June 29, the winter snow accumulated on the glaciers will no longer be sufficient to offset the melting caused by rising temperatures.

This point of "net loss" signifies that more ice is disappearing than is being replenished, a trend that will continue throughout the summer months. The glaciers, which take years to form, are now melting irreversibly under the sun's intense rays.

Last year, this critical threshold was reached later in July, and in 2024, it occurred in August. The fact that it is happening just three days after the record set in 2022 underscores the accelerating impact of climate change on these vital frozen reservoirs. In 2022, Swiss glaciers lost 6% of their total mass, highlighting the severity of the ongoing melt.