1. Hock, R. et al. in IPCC Special Report on the Ocean and Cryosphere in a Changing Climate (eds Pörtner, H.-O. et al.) Ch. 2 (IPCC, Cambridge Univ. Press, 2019).
2. Matiu, M. et al. Observed snow depth trends in the European Alps: 1971 to 2019. Cryosphere 15, 1343–1382 (2021).
3. Kotlarski, S. et al. 21st century alpine climate change. Clim. Dyn. 60, 65–86 (2022).
4. Abegg, B., Agrawala, S., Crick, F. & de Montfalcon, A. in Climate Change in the European Alps: Adapting Winter Tourism and Natural Hazards Management Ch. 2 (OECD, 2007).
5. A European Green Deal (European Commission, 2019); https://ec.europa.eu/info/strategy/priorities-2019-2024/european-green-deal_en