欧洲最高峰勃朗峰在过去一年内高度下降1.29米，从2025年的4,808.76米降至2026年的4,807.47米1。这一变化由高山省地区测量队利用卫星技术和无人机进行精密测量得出1。自2007年最高值4,810.90米以来，勃朗峰已累计下降3.43米1。
高山省测量队领导让·德·加雷特指出，在攀登过程中明显感受到冰川的快速消融。他表示："当我们攀登时，经过白旅旅馆和图特-卢塞冰川，我们看到冰川向上移动，它在我们眼前融化，现在有些地方我们跨越的是溪流而不是冰川"1。瑞士冰川学家数据显示，过去5年瑞士五分之一的冰已消失，2025-2026年间冰量体积损失达5.5%1。
专家警示不应将逐年高度波动与气候变化导致的冰川加速消融直接挂钩1。法国国家测量师工会发言人强调："需要区分地表高度变化与冰川总体体积或质量变化"1。该测量机构从2001年开始定期监测勃朗峰高度变化1。
Europe's highest peak has experienced a significant reduction in elevation, with Mont Blanc dropping 1.29 metres between 2025 and 2026, falling from 4,808.76 metres to 4,807.47 metres.1 The measurement was conducted by the Haute-Savoie regional surveying team using satellite technology and drone mapping, revealing the extent of ice and snow loss across the Alpine summit.1
The recent decline is part of a longer-term pattern of altitude loss on the mountain. Since reaching its highest recorded measurement of 4,810.90 metres in 2007, Mont Blanc has declined by 3.43 metres overall.1 The peak touched its lowest level in recent years at 4,805.59 metres in 2023.1 Jean de Garrette, who leads the Haute-Savoie surveying team, described witnessing the glacier's transformation firsthand, stating: "When we climb, passing the Refuge du Goûter and the Glacier de la Brenva, we see the glacier moving upward, it is melting before our eyes, and now in some places we are crossing streams rather than glaciers."1
The melting reflects broader changes across the Alps. Swiss glaciologists have confirmed that one-fifth of Switzerland's ice has disappeared over the past five years, with an additional 5.5 per cent loss in ice volume recorded between 2025 and 2026.1 However, experts caution against directly linking year-to-year height fluctuations to climate-driven glacier acceleration. A spokesperson for the National Union of French Surveyors noted the importance of distinguishing between surface elevation changes and overall glacier volume or mass loss.1 Systematic monitoring of Mont Blanc's height has been conducted since 2001.1
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