Spectrum NIR reflectance spectrum of initial CO2 snow with 1.5wt% H2O ice - t0 (t=0min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t1 (t=10min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t2 (t=20min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t3 (t=30min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t4 (t=40min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t5 (t=50min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t6 (t=60min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t7 (t=70min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t8 (t=80min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t9 (t=90min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t10 (t=100min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t11 (t=110min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t12 (t=120min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t13 (t=140min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t14 (t=160min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t15 (t=180min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t16 (t=200min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t17 (t=220min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t18 (t=240min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t19 (t=260min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t20 (t=280min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t21 (t=300min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t22 (t=320min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t23 (t=340min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t24 (t=360min)

Spectrum NIR reflectance spectrum of initial CO2 snow with 0.1wt% H2O ice - t0 (t=0min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t1 (t=10min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t2 (t=20min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t3 (t=30min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t4 (t=40min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t5 (t=50min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t6 (t=60min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t7 (t=70min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t8 (t=80min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t9 (t=90min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t10 (t=100min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t11 (t=110min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t12 (t=120min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t13 (t=140min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t14 (t=160min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t15 (t=180min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t16 (t=200min) Spectrum NIR reflectance spectrum of sublimating CO2 snow with 0.1wt% H2O ice - t1 (t=220min) Spectrum NIR reflectance spectrum of remaining H2O ice layer - t18 (t=240min) Spectrum NIR reflectance spectrum of remaining H2O ice layer - t19 (t=260min) Spectrum NIR reflectance spectrum of remaining H2O ice layer - t20 (t=280min) Spectrum NIR reflectance spectrum of remaining H2O ice layer - t21 (t=300min) Spectrum NIR reflectance spectrum of remaining H2O ice layer - t22 (t=320min) Spectrum NIR reflectance spectrum of remaining H2O ice layer - t23 (t=340min)