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I'm working at the University of Geneva in the Climate Change Impacts and Risks in the Anthropocene team of the Institute for Environmental Science. My research is about the long-term evolution of snow avalanche activity in a changing world. My most recent publications focus mainly on improving dendrogeomorphic analysis in order to reconstruct past snow avalanche events and to identify robust trends in the snow avalanche activity at the regional scale.
Dendrogeomorphic analyses provide long and continuous chronologies of mass movements that are useful for the detection of trends related to climate change. Socio-environmental changes can, however, induce non-stationarities. This study addresses the following questions: (1) How does the evolution of forest cover induce non-stationarities in tree-ri...
Au 20ème siècle, les massifs montagneux, dont les Alpes, ont connu un réchauffement significatif avec une augmentation des températures deux fois plus importante que la moyenne mondiale. Un tel réchauffement altère les composantes de la cryosphère. Elle induit, par exemple, un passage des précipitations solides aux précipitations liquides, des phas...
In the current context of anthropogenic global warming, one of the purposes of dendrogeomorphic analyses is to provide long and continuous chronologies of mass movements, so as to detect potential trends or shift related to increasing temperatures. However, on documented slopes, the comparison between historical archives and tree-ring records sugge...
Expected runout distances and related return periods are the most important parameters needed for zoning in terrain prone to snow avalanching. Hazard mapping procedures usually allocate areas of land to zones with a different degree of danger based on return periods estimated for given snow volumes in the starting zone or with statistical/dynamical...
The purpose of dendrogeomorphic analyses is to amplify the signal related to the geomorphic process under investigation, and to minimize the noise induced by other signals in the tree-ring series. Yet, to date, no study accounts specifically for interferences induced by climate conditions or exogenous disturbances and which can, potentially, affect...
Determination of spatial and temporal patterns of rockfall events remains a serious challenge in most mountain areas and especially when it comes to quantitative hazard assessments, because of the scarcity and incompleteness of long-Term records. his lack of reliable baseline data is particularly problematic in urbanized areas where rockfall risk t...
From a wide variety of maps and iconographic sources, spatially corrected and georeferenced, this work seeks to precisely reconstruct the hydro-morphological changes at the confluence of two main Alpine rivers: Drac and Isère. Multi-centennial knowledge of the morphological evolution this confluence can help in documenting regional climate changes...
Contributions of the tree-ring approach to the spatio-temporal reconstruction of avalanche activity in a context of environmental changes in two alpine regions: the Queyras Massif (France) and the Goms Valley (Valais, Switzerland).