瑞士过去十年冰川总体冰量缩减四分之一

Core Viewpoint - The overall ice volume of Swiss glaciers has decreased by one-quarter over the past decade, with over 1,000 small glaciers completely disappearing [1] Group 1: Glacier Volume Reduction - In 2025, Swiss glaciers are expected to lose approximately 3% of their volume, marking the fourth-largest reduction since measurements began [1] - The years with the largest reductions prior to 2025 were 2022, 2023, and 2003 [1] Group 2: Impact of Weather Conditions - The combination of a lack of snowfall in winter and heatwaves in June and August has led to significant glacier melting [1] - Snow reserves were depleted by early July, causing glaciers to start melting unusually early [1] Group 3: Specific Glacier Loss - Glaciers below 3,000 meters in elevation are experiencing particularly severe losses, with thickness reductions exceeding two meters in some cases, and at least one meter in others [1] Group 4: Potential Risks - Continuous glacier melting may lead to mountain instability, potentially triggering events similar to the recent collapse of the Birch Glacier, which resulted in a mudslide that destroyed much of the nearby village of Bratten [1]