Articles | Volume 8, issue 3
https://doi.org/10.5194/esurf-8-753-2020
https://doi.org/10.5194/esurf-8-753-2020
Research article
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11 Sep 2020
Research article | Highlight paper |  | 11 Sep 2020

A 6-year lidar survey reveals enhanced rockwall retreat and modified rockfall magnitudes/frequencies in deglaciating cirques

Ingo Hartmeyer, Markus Keuschnig, Robert Delleske, Michael Krautblatter, Andreas Lang, Lothar Schrott, Günther Prasicek, and Jan-Christoph Otto

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Cited articles

Abellán, A., Calvet, J., Vilaplana, J. M., and Blanchard, J.: Detection and spatial prediction of rockfalls by means of terrestrial laser scanner monitoring, Geomorphology, 119, 162–171, 2010. 
Abellán, A., Vilaplana, J. M., Calvet, J., García-Sellés, D., and Asensio, E.: Rockfall monitoring by Terrestrial Laser Scanning – case study of the basaltic rock face at Castellfollit de la Roca (Catalonia, Spain), Nat. Hazards Earth Syst. Sci., 11, 829–841, https://doi.org/10.5194/nhess-11-829-2011, 2011. 
Åkerman, H. J.: Notes on chemical weathering, Kapp Linné, Spitsbergen, Fourth International Permafrost Conference Proceedings, 10–15, Fairbanks, Alaska, USA, 18–22 July 1983. 
Allen, S. K., Cox, S. C., and Owens, I. F.: Rock avalanches and other landslides in the central Southern Alps of New Zealand: a regional study considering possible climate change impacts, Landslides, 8, 33–48, 2011. 
Andrews, J. T. and LeMasurier, W. E.: Rates of Quaternary Glacial Erosion and Corrie Formation, Marie Byrd Land, Antarctica. Geology, 1, 75–80, 1973. 
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Short summary
Rockfall size and frequency in two deglaciating cirques in the Central Alps, Austria, is analysed based on 6-year rockwall monitoring with terrestrial lidar (2011–2017). The erosion rates derived from this dataset are very high due to a frequent occurrence of large rockfalls in freshly deglaciated areas. The results obtained are important for rockfall hazard assessments, as, in rockwalls affected by glacier retreat, historical rockfall patterns are not good predictors of future events.
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