Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 14
Articles | Volume 30, issue 14
https://doi.org/10.5194/hess-30-4649-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-4649-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 14
Research article
 | 
23 Jul 2026
Research article |  | 23 Jul 2026

The 2022–2023 snow drought in the Italian Alps doubled glacier contribution to summer streamflow

Martina Leone, Francesco Avanzi, Umberto Morra di Cella, Simone Gabellani, Edoardo Cremonese, Michel Isabellon, Paolo Pogliotti, Riccardo Scotti, Andrea Monti, Luca Ferraris, and Roberto Colombo

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Latest update: 07 Nov 2026
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Short summary
We investigated how glaciers helped sustain summer river flow during the severe snow shortages of 2022 and 2023 in the Italian Alps. Using high-resolution modeling and long-term data, we found that glacier melt contributed up to three times more than in average years. This enhanced melt partly compensated for low snow and precipitation, showing the critical role of glaciers in supporting water resources during droughts.
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