Spectrum Vis-NIR reflectance spectrum of 0.10% PAHs mixed with CO2 snow - t=0 Spectrum Vis-NIR reflectance spectrum of 0.10% PAHs mixed with CO2 snow - t=1h45 Spectrum Vis-NIR reflectance spectrum of 0.10% PAHs mixed with CO2 snow - lamp 20min Spectrum Vis-NIR reflectance spectrum of 0.10% PAHs mixed with CO2 snow - Lamp 33min Spectrum Vis-NIR reflectance spectrum of 0.10% PAHs with H2O frost - Lamp 43min

Spectrum Vis-NIR reflectance spectrum of 0.54% PAHs mixed with CO2 snow - t=0 Spectrum Vis-NIR reflectance spectrum of 0.54% PAHs mixed with CO2 snow - t=4h Spectrum Vis-NIR reflectance spectrum of 0.54% PAHs mixed with CO2 snow - t=7h40 Spectrum Vis-NIR reflectance spectrum of 0.54% PAHs mixed with CO2 snow - t=8h50 Spectrum Vis-NIR reflectance spectrum of 0.54% PAHs mixed with CO2 snow - t=9h45 Spectrum Vis-NIR reflectance spectrum of 0.54% PAHs mixed with H2O frost - t=10h55 Spectrum Vis-NIR reflectance spectrum of 0.54% PAHs mixed with H2O frost - t=19h

Spectrum Vis-NIR reflectance spectrum of 0.67% PAHs mixed with CO2 snow - t=0 Spectrum Vis-NIR reflectance spectrum of 0.67% PAHs mixed with CO2 snow - t=2h20 Spectrum Vis-NIR reflectance spectrum of 0.67% PAHs mixed with CO2 snow - t=3h30 Spectrum Vis-NIR reflectance spectrum of 0.67% PAHs mixed with CO2 snow - t=4h25 Spectrum Vis-NIR reflectance spectrum of 0.67% PAHs with H2O frost - t=7h45 Spectrum Vis-NIR reflectance spectrum of 0.67% PAHs with H2O frost - t=16h10