The sublimation of solid ice happens just as quickly as the evaporation of liquid water
(PHYSorg.com Physics)

One might expect water to evaporate much faster than ice. Surprisingly, researchers from the University of Amsterdam have now shown that for small droplets of ice, this is not the case: ice and water droplets disappear equally quickly. This explains a fact that skiers know well: freshly fallen snow is very different from snow that is a few days old. The results were published in Nature Communications this week.