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Fig. 2


Top panel: synthetic emission spectrum of a Proxima Centauri-like star (normalized by the peak value) used as input for the GCM calculations. For comparison, we put the spectrum of the Sun as usually computed in the LMD-GCM radiative transfer. Bottom panel: spectral distribution of snow and ice surface albedo as computed in the GCM. Integrated snow and ice albedo values are 0.55 and 0.27 for the Sun and Proxima Centauri, respectively.

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