Earth Sciences

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

J. Qie, A. Favillier, et al.

Explore the intriguing findings from a study conducted by Jiazhi Qie and colleagues on debris flows in the Eastern Swiss Alps! Spanning nearly 400 years, this research reveals surprising stability in debris-flow frequency and magnitude, challenging assumptions about climate influence and highlighting the critical role of sediment supply in these dynamic systems.

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Playback language: English

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Abstract

This study reconstructs the longest continuous time series (1626–2020) of debris flows at Multetta, a supply-limited torrential system in the Eastern Swiss Alps, using tree-ring records. The analysis reveals no significant changes in debris-flow frequency or magnitude over time, suggesting a lack of direct climatic influence on debris-flow initiation. This contrasts with findings from transport-limited catchments and highlights the importance of sediment supply in controlling debris-flow activity in supply-limited systems.

Publisher

Nature Communications

Published On

Oct 21, 2024

Authors

Jiazhi Qie, Adrien Favillier, Frédéric Liébault, Juan Antonio Ballesteros Cánovas, Jérôme Lopez-Saez, Sébastien Guillet, Loïc Francon, Yihua Zhong, Markus Stoffel, Christophe Corona

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