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| Argentière Glacier | |
|---|---|
| Name | Argentière Glacier |
| Other names | Glacier d'Argentière |
| Location | Haute-Savoie, Auvergne-Rhône-Alpes, France |
| Coordinates | 45°56′N 6°55′E |
| Area | ~9.5 km² (historical) |
| Length | ~5.5 km (historical) |
| Terminus | Argentière valley |
| Status | Retreating |
Argentière Glacier is a prominent alpine glacier on the northern flank of the Mont Blanc massif in the French Alps. Nestled above the village of Argentière and the Chamonix Valley, it has long been a focus for mountaineering, glaciology, alpine tourism, and hydrological studies. The glacier’s changing morphology has made it a central case for research on climate change, glacier retreat, and human impacts in high mountain environments.
The glacier occupies a steep cirque beneath notable peaks including the Aiguille du Chardonnet, Aiguille d'Argentière, and Pointe de Balme, draining northward toward the River Arve and the valley town of Chamonix-Mont-Blanc. Its accumulation zone lies near the borders of the Vallée Blanche and the Valais massif, adjacent to the Tour noir and close to the Italian border. Access routes from Chamonix and Vallorcine link to lifts such as the Téléphérique de l'Aiguille du Midi and the Tramway du Mont Blanc, which serve climbers and scientists heading to the glacier’s upper névé and lower snout.
Situated within the Mont Blanc Massif crystalline core, the glacier overlies Precambrian to Paleozoic crystalline rocks including granite and gneiss exposed in the Aiguilles Rouges and neighboring ranges. Its valley was sculpted during successive glacial stages of the Pleistocene including the Riss glaciation and Würm glaciation, leaving classic U-shaped troughs, moraines, and overdeepenings. The bedrock topography, moraine dams, and hanging valleys influence ice flow, crevasse patterns, and proglacial sedimentation that feed into the Arve glacial system.
Argentière Glacier demonstrates typical alpine glacier features: an upper névé with firn fields, a central icefall traversed by seracs, and a lower ablation tongue punctuated by medial moraines. Contemporary surveys document englacial crevassing, basal sliding over polished bedrock, and debris-covered ice near the terminus that affects melt rates. Mass balance measurements by teams from IPEV, Laboratoire de Glaciologie (Grenoble), and Météo-France quantify seasonal accumulation and ablation, while GPS stakes and remote sensing from Copernicus Programme satellites and Landsat missions track length change, surface velocity, and thickness variations.
Since the 19th-century end of the Little Ice Age, the glacier has experienced net retreat and negative mass balance, with accelerated shrinkage since the late 20th century recorded alongside warming trends reported by IPCC assessments. Documented drivers include rising summer temperatures documented by NOAA and Météo-France, altered precipitation regimes influenced by Atlantic and Mediterranean circulation patterns such as the North Atlantic Oscillation, and anthropogenic greenhouse gas forcing assessed by IPCC models. The glacier’s retreat has exposed forefields colonized by pioneering flora documented by botanists from Muséum national d'Histoire naturelle and altered downstream hydrology affecting hydroelectric installations like those managed by EDF.
The glacier is integral to local economies anchored in alpine tourism, skiing, and mountaineering centered on Chamonix-Mont-Blanc and Argentière. Historic routes up the glacier connect to classic ascents on the Aiguille d'Argentière and traverse the Vallée Blanche linking to the Bossons Glacier corridor. Guided companies such as Compagnie des Guides de Chamonix and ski operators running from the Brevent–Flegere sector facilitate seasonal access. Infrastructure includes mountain huts like the Refuge d'Argentière and rescue services by PGHM and Samu 74; safety protocols address crevasse rescue, serac fall, and avalanches in coordination with regional authorities of Haute-Savoie.
The glacier featured in early alpine exploration by figures associated with the Golden Age of Alpinism and in pioneering glaciological observations by 19th-century scientists linked to institutions such as École Polytechnique and Université Grenoble Alpes. Longitudinal studies by teams from Université Savoie Mont Blanc, CNRS, and international collaborators have produced time series of mass balance, radiocarbon-dated moraine chronologies, and isotopic analyses of firn cores. Monitoring programs feed into international networks like the World Glacier Monitoring Service and inform policy discussions at forums including the UNFCCC and regional mountain adaptation initiatives coordinated by Alpine Convention delegates.
Category:Glaciers of the Alps Category:Geography of Haute-Savoie