2026年8月4日，格陵兰西北部彼得曼冰川发生重大崩解事件，一个面积达76.4平方公里、厚度约150米的巨大冰岛脱离冰川1。这片冰岛规模相当于曼哈顿，代表该冰川自2012年以来最大的浮冰舌损失，也是北极地区自2020年以来规模最大的冰岛崩解事件1。
根据卫星监测数据，分裂于2026年8月4日20:00（协调世界时）完成1。渥太华大学冰川学博士生亚当·加博发现了这一事件1。
科学家预测未来还有两个更大的冰川段可能相继脱离，分别达到94平方公里和84平方公里，这将导致冰舌总面积减少约254平方公里，占冰舌面积的约22%1。斯特林大学博士安娜·克劳福德指出，北极浮冰岛相对罕见1。加拿大冰务部博士艾比盖尔·道尔顿表示，漂流冰块可能对航海安全构成风险1。
A massive ice island measuring 76.4 square kilometers and approximately 150 meters thick has calved from Greenland's Petermann Glacier, marking the glacier's largest floating ice tongue loss since 2012 1. The detachment was completed on August 4, 2026, at 20:00 UTC, and represents the largest Arctic calving event recorded since 2020 1. The newly formed ice island is comparable in size to Manhattan, according to satellite monitoring that has tracked changes to the glacier since 2019 1.
Scientists have identified two additional large glacier sections that may break away in the future, which together could reduce the ice tongue's total area by approximately 22 percent 1. Those prospective calving events would involve ice islands measuring 94 and 84 square kilometers respectively, bringing cumulative losses to around 254 square kilometers 1. The discovery of this calving event was made by Adam Garbo, a glaciology doctoral student at the University of Ottawa 1. Dr. Anna Crawford of the University of Stirling noted that Arctic ice islands of this magnitude are relatively uncommon 1, while Dr. Abigail Dalton of Canada's ice service warned that drifting ice fragments pose potential navigational hazards 1.
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