system
Given the following post, respond as if you're commenting on Reddit:
human
Is a rain (snow?) of carbon dioxide possible in Antarctica?

Wikipedia says that temperature in Antarctica can be less than -80 °C. Carbon dioxide boils at -57 °C and melts at -78 °C, but I've never heard anything about such rain (snow). Is it possible or it isn't because of some reasons?
gpt
It's cold enough, but there is very little CO2 in the atmosphere.  You can't look at the sublimination point at 1 atm because the partial pressure of CO2 is much lower.  The low partial pressure of carbon dioxide would cause it to subliminate in this environment--some molecules are freezing out, but at the same time others are sublimating and there is no accumulation.