An integrated approach to investigate climate-driven rockfall occurrence in high alpine slopes: the Bessanese glacial ba
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An
integrated
e-mail: [email protected]
approach
to
http://jms.imde.ac.cn https://doi.org/10.1007/s11629-020-6216-y
investigate
climate-driven
rockfall occurrence in high alpine slopes: the Bessanese glacial basin, Western Italian Alps VIANI Cristina1,2*
https://orcid.org/0000-0002-0993-0509;
CHIARLE Marta2
https://orcid.org/0000-0001-8447-3822; email: [email protected]
PARANUNZIO Roberta2,3 MERLONE Andrea2,4
e-mail: [email protected]
https://orcid.org/0000-0002-2270-7467; e-mail: [email protected]
https://orcid.org/0000-0002-3651-4586; email: [email protected]
MUSACCHIO Chiara4
https://orcid.org/0000-0001-7473-3678; e-mail: [email protected]
COPPA Graziano4
https://orcid.org/0000-0002-2847-3286; e-mail: [email protected]
NIGRELLI Guido2
https://orcid.org/0000-0002-5506-5915; e-mail: [email protected]
* Corresponding author 1 Department of Earth Sciences, University of Torino, 10125 Torino, Italy 2 Research Institute for Geo-Hydrological Protection, Italian National Research Council, 10135 Torino, Italy 3 Institute of Atmospheric Sciences and Climate, Italian National Research Council, 10133 Torino, Italy 4 National Institute of Metrological Research, 10135 Torino, Italy Citation: Viani C, Chiarle M, Paranunzio R, et al. (2020) An integrated approach to investigate climate-driven rockfall occurrence in high alpine slopes: the Bessanese glacial basin, Western Italian Alps. Journal of Mountain Science 17(11). https://doi.org/10.1007/s11629-020-6216-y
© The Author(s) 2020.
Abstract: Rockfalls are one of the most common instability processes in high mountains. They represent a relevant issue, both for the risks they represent for (infra) structures and frequentation, and for their potential role as terrestrial indicators of climate change. This study aims to contribute to the growing topic of the relationship between climate change and slope instability at the basin scale. The selected study area is the Bessanese glacial basin (Western Italian Alps) which, since 2016, has been specifically equipped, monitored and investigated for this purpose. In order to provide a broader context for the interpretation of the recent rockfall events and associated climate conditions, a cross-temporal and Received: 19-May-2020 1st Revision: 14-Jul-2020 2nd Revision: 14-Aug-2020 Accepted: 14-Sep-2020
integrated approach has been adopted. For this purpose, geomorphological investigations (last 100 years), local climate (last 30 years) and near-surface rock/air temperatures analyses, have been carried out. First research outcomes show that rockfalls occurred in two different geomorphological positions: on rock slopes in permafrost condition, facing from NW to NE and/or along the glacier margins, on rock slopes uncovered by the ice in the last decades. Seasonal thaw of the active layer and/or glacier debutressing can be deemed responsible for slope failure preparation. With regard to timing, almost all dated rock falls occurred in summer. For the July events, initiation may have been ca
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