Articles | Volume 29, issue 21
https://doi.org/10.5194/hess-29-5931-2025
https://doi.org/10.5194/hess-29-5931-2025
Research article
 | 
03 Nov 2025
Research article |  | 03 Nov 2025

Multi-fidelity model assessment of climate change impacts on river water temperatures and thermal extremes and potential effects on cold-water fish in Switzerland

Love Råman Vinnå, Vidushi Bigler, Oliver S. Schilling, and Jannis Epting

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Cited articles

Alp, A., Erer, M., and Kamalak, A.: Eggs Incubation, Early Development and growth in Frys of Brown Trout (Salmo trutta macrostigma) and Black Sea Trout (Salmo trutta labrax), Turkish Journal of Fisheries and Aquatic Sciences, 10, https://doi.org/10.4194/trjfas.2010.0312, 2010. 
Barbarossa, V., Bosmans, J., Wanders, N., King, H., Bierkens, M. F. P., Huijbregts, M. A. J., and Schipper, A. M.: Threats of global warming to the world's freshwater fishes, Nature Communications, 12, 1701, https://doi.org/10.1038/s41467-021-21655-w, 2021. 
Benyahya, L., Caissie, D., St-Hilaire, A., Ouarda, T. B. M. J., and Bobée, B.: A Review of Statistical Water Temperature Models, Canadian Water Resources Journal, 32, 179–192, https://doi.org/10.4296/cwrj3203179, 2007. 
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Bögli, R.: Time Series Clustering with Water Temperature Data, University of applied sciences and arts Northwestern Switzerland (FHNW), https://romanboegli.ch/assets/pdf/Boegli_2020_TimeSeriesClustering.pdf (last access: 16 October 2025), 2020. 
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Short summary
River water temperature is a key factor for water quality. Under climate change, inland water temperatures have increased, putting pressure on aquatic life and reducing the potential for human use. Here, future river water temperatures for Switzerland are studied. Results show that, towards the end of the 21st century, average river water temperatures will likely increase by 3.1 ± 0.7 °C. This is likely to increases the thermal stress on sensitive aquatic species such as the brown trout.
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