#IMC: September 14 - 18 2025

Upward migration of snowline in the Alps and impact on Elevation-Dependent Warming in MAR simulations over 1961-2100

Assigned Session: FS 3.135: Elevational stratification of climate change: impacts and driving mechanisms in global mountain ecosystems

Abstract ID: 3.10712 | Accepted as Talk | Talk/Oral | TBA | TBA

Ian Castellanos (0)
Ménégoz, Martin, Blanchet, Juliette, Beaumet, Julien (1)
Ian Castellanos ((0) Institut des Géosciences de l'Environnement (IGE), 54 rue Molière, 38400, Saint-Martin-d'Hères, Auvergne-Rhône-Alpes, FR)
Ménégoz, Martin, Blanchet, Juliette, Beaumet, Julien (1)

(0) Institut des Géosciences de l'Environnement (IGE), 54 rue Molière, 38400, Saint-Martin-d'Hères, Auvergne-Rhône-Alpes, FR
(1) Atmo Auvergne-Rhône-Alpes, 14 avenue Benoît Frachon, 38400 St-Martin-d'Hères

(1) Atmo Auvergne-Rhône-Alpes, 14 avenue Benoît Frachon, 38400 St-Martin-d'Hères

Categories: Atmosphere, Cryo- & Hydrosphere
Keywords: Elevation-Dependent Warming, Alps, Regional Climate Model, Seasonal, Surface energy balance

Categories: Atmosphere, Cryo- & Hydrosphere
Keywords: Elevation-Dependent Warming, Alps, Regional Climate Model, Seasonal, Surface energy balance

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Mountain regions exhibit specific regional imprints when it comes to climate change. The presence of snow plays a role in this imprint and adds a strong seasonality to the observed changes. This study aims to understand the processes that link Elevation-Dependent Warming to the upward migration of the snowline, by investigating the surface energy balance in the Alps through the seasons. Combining three MAR (Modèle Atmosphérique Régional) simulations with a 7kmx7km resolution over 1961-2100 and under different climate scenarios, the change in albedo due to the upward migration of the snowline and the energy used to melt snow are found to be major drivers in the patterns of EDW simulated by MAR in the Alps.

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