Habitable climates on Proxima b

Various possibilities for ice distribution. High cloud coverage seems to be a rule, which may make detection of oceans on Proxima b and similar planets difficult.

Del Genio et al. "Habitable Climate Scenarios for Proxima Centauri b With a Dynamic Ocean"
https://arxiv.org/abs/1709.02051

Assuming it can retain sufficient atmosphere and ocean in a close orbit around a flare star, of course...