18-years of high-Alpine rock wall monitoring using terrestrial laser scanning at the Tour Ronde east face, Mont-Blanc massif

Since the end of the 20th century, each decade has been warmer than the previous one in the European Alps. As a consequence, Alpine rock walls are generally facing high rockfall activity, likely due to permafrost degradation. We use a unique terrestrial laser scanning derived rockfall catalog over 1...

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Veröffentlicht in:Environmental research letters 2024-03, Vol.19 (3), p.34037
Hauptverfasser: Courtial-Manent, Léa, Ravanel, Ludovic, Mugnier, Jean-Louis, Deline, Philip, Lhosmot, Alexandre, Rabatel, Antoine, Duvillard, Pierre-Allain, Batoux, Philippe
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Sprache:eng
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Zusammenfassung:Since the end of the 20th century, each decade has been warmer than the previous one in the European Alps. As a consequence, Alpine rock walls are generally facing high rockfall activity, likely due to permafrost degradation. We use a unique terrestrial laser scanning derived rockfall catalog over 18 years (2005–2022) compared with photographs (1859–2022) to quantify the evolution of the east face of Tour Ronde (3440–3792 m a.s.l.) in the Mont-Blanc massif (western European Alps) that is permafrost-affected. Overall, 210 rockfalls were identified, from 1 to 15 500 m 3 . Forty-five events were >100 m 3 while cumulated volume of events
ISSN:1748-9326
1748-9326
DOI:10.1088/1748-9326/ad281d