Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=0.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=0.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=1.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=1.8 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=2.3 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=2.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=3.2 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=3.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=4.1 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=4.6 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=5.0 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=5.5 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=6.6 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=7.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=8.8 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=9.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=11.0 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=12.1 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=13.3 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=14.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=44.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a pure H2O ice slab (t=46.0 hours)

Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=0.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=0.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=1.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=1.8 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=2.3 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=2.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=3.2 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=3.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=4.1 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=4.6 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=5.0 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=5.5 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=6.6 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=7.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=8.8 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=9.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=11.0 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=12.1 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=13.3 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=14.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=44.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (10 wt.% MgSO4) (t=46.0 hours)

Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=0.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=0.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=1.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=1.8 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=2.3 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=2.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=3.2 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=3.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=4.1 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=4.6 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=5.0 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=5.5 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=6.6 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=7.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=8.8 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=9.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=11.0 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=12.1 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=13.3 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=14.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=44.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (20 wt.% MgSO4) (t=46.0 hours)

Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=0.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=0.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=1.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=1.8 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=2.3 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=2.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=3.2 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=3.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=4.1 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=4.6 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=5.0 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=5.5 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=6.6 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=7.7 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=8.8 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=9.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=11.0 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=12.1 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=13.3 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=14.4 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=44.9 hours) Spectrum VIS-NIR reflectance spectrum collected during sublimation of a salty H2O ice slab (30 wt.% MgSO4) (t=46.0 hours)