A supply-limited torrent that does not feel the heat of climate change.

Autor: Qie J; Climatic Change Impacts and Risks in the Anthropocene (C-CIA), Institute for Environmental Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland. jiazhi.qie@etu.unige.ch., Favillier A; Climatic Change Impacts and Risks in the Anthropocene (C-CIA), Institute for Environmental Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland.; dendrolab.ch, Department of Earth Sciences, University of Geneva, 13 rue des Maraichers, CH-1205, Geneva, Switzerland., Liébault F; Université Grenoble Alpes, INRAE, CNRS, IRD, Grenoble INP, IGE, 2 rue de la Papeterie BP76, F-38402, Saint-Martin-d'Hères, France., Ballesteros Cánovas JA; Climatic Change Impacts and Risks in the Anthropocene (C-CIA), Institute for Environmental Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland.; National Museum of Natural Sciences, MNCN-CSIC, C/ Serrano 115bis, E-28006, Madrid, Spain., Lopez-Saez J; Climatic Change Impacts and Risks in the Anthropocene (C-CIA), Institute for Environmental Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland., Guillet S; Climatic Change Impacts and Risks in the Anthropocene (C-CIA), Institute for Environmental Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland., Francon L; Climatic Change Impacts and Risks in the Anthropocene (C-CIA), Institute for Environmental Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland., Zhong Y; Climatic Change Impacts and Risks in the Anthropocene (C-CIA), Institute for Environmental Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland., Stoffel M; Climatic Change Impacts and Risks in the Anthropocene (C-CIA), Institute for Environmental Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland. markus.stoffel@unige.ch.; dendrolab.ch, Department of Earth Sciences, University of Geneva, 13 rue des Maraichers, CH-1205, Geneva, Switzerland. markus.stoffel@unige.ch.; Department F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland. markus.stoffel@unige.ch., Corona C; Climatic Change Impacts and Risks in the Anthropocene (C-CIA), Institute for Environmental Sciences, University of Geneva, 66 Boulevard Carl Vogt, CH-1205, Geneva, Switzerland.; Université Grenoble-Alpes, LECA UMR UGA-USMB-CNRS 5553, F-38058, Grenoble, Cedex 9, France.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Oct 21; Vol. 15 (1), pp. 9078. Date of Electronic Publication: 2024 Oct 21.
DOI: 10.1038/s41467-024-53316-z
Abstrakt: Debris-flow activity in the Alps is anticipated to undergo pronounced changes in response to a warming climate. Yet, a fundamental challenge in comprehensively assessing changes in process activity is the systematic lack of long-term observational debris-flow records. Here, we reconstruct the longest, continuous time series (1626-2020) of debris flows at Multetta, a supply-limited torrential system in the Eastern Swiss Alps. Relying on growth-ring records of trees that were damaged by debris flows, we do not detect significant changes in the frequency or magnitude over time. This seeming absence of a direct climatic influence on debris-flow initiation aligns with the regular distribution of repose time patterns, indicating a dependence of local process activity on sediment discharge and recharge. This stark difference in process behavior between our supply-limited site and transport-limited catchments has implications for assessing torrential hazard and risk mitigation in a context of global warming.
(© 2024. The Author(s).)
Databáze: MEDLINE
Externí odkaz: