https://doi.org/10.5194/nhess-2021-128 Preprint. Discussion started: 27 April 2021 c Author(s) 2021. CC BY 4.0 License. Rockfall and vulnerability of mountaineers on the west face of the Aiguille du Goûter (classic route up Mont Blanc, France), an interdisciplinary study Jacques Mourey1,2, Pascal Lacroix3, Pierre-Allain Duvillard1,4, Guilhem Marsy1,5,6, Marco Marcer7, 5 Ludovic Ravanel1, Emmanuel Malet1 1 EDYTEM, Savoie Mont-Blanc University, CNRS, 73000 Chambéry, France. 2 Interdisciplinary Centre for Mountain Research, University of Lausanne, Ch. de l'Institut 18, CH-1967 Bramois, Switzerland 3 ISTerre, IRD-CNRS-OSUG, Grenoble Alpes University, 38400 Saint-Martin-d’Hères, France. 4 Styx 4D, 73 370 Le Bourget du Lac, France. 10 5LISTIC, Savoie Mont-Blanc University, Polytech Annecy-Chambéry, France. 6 TENEVIA, 38240 Meylan, France. 7 PACTE, Grenoble Alpes University, Alpine Geography institute, CNRS, 38041 Grenoble, France. Correspondence to: Jacques Mourey (
[email protected]) Abstract. In high alpine environments, climate change leads to an increase in rockfall destabilizations. They represent a threat 15 for sports and tourism activities in high mountain and especially for mountaineering. This danger of rockfall is particularly important on the classic route up Mont Blanc (4,809 m a.s.l., Mont Blanc massif, France), on the west face of the Aiguille du Goûter (3,863 m a.s.l.), and is responsible for at least 29% of the accidents that occur in this sector. Despite the intensity of the geomorphological processes at work and the vulnerability of climbers, few scientific studies have been carried out on the occurrence of rockfalls and their triggering factors in the Goûter area.