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Fun fact, I saw the temperatures they're getting and I just looked this up to be sure. The freezing point of Carbon Dioxide at atmospheric pressures is -78.5C,
by mlindner 4y ago
Fun fact, I saw the temperatures they're getting and I just looked this up to be sure.
The freezing point of Carbon Dioxide at atmospheric pressures is -78.5C, which it reaches sometimes at the south pole.
So apparently carbon dixodie can freeze out of the atmosphere (deposition) and turn to solid carbon dioxide ice in mid-winter. Though I believe because the partial pressure will be too low, you'd need to concentrate the CO2 first.
- shagie 4y agoNote the last bit with the weather report: https://brr.fyi/media/sunset/weather-data.png https://brr.fyi/media/sunset/weather-data.png The station is at 10,657 feet (it's on top of a mountain) and the air pressure is 679.1 mb. Though https://en.wikipedia.org/wiki/Dry_ice#/media/File:Comparison_carbon_dioxide_water_phase_diagrams.svg https://en.wikipedia.org/wiki/Dry_ice#/media/File:Comparison... is a log chart for y and doesn't have many minor ticks for X ... I want to say it's closer to -83 °C. It's significant enough that you'd notice (if you were to go outside).
- jcranmer 4y ago> The station is at 10,657 feet (it's on top of a mountain) Nitpick: it's not on top of a mountain, it's on top of a 2-mile-thick ice sheet (glacier).
- wcoenen 4y agoIt has been considered to sequester CO2 at Antarctica by just cooling the air a bit more (e.g. with a few gigawatt of wind farms), and keeping the solid CO2 in a "CO2 landfill". https://earthtechling.com/2015/11/could-we-sequester-co2-in-antarctic-ice/ https://earthtechling.com/2015/11/could-we-sequester-co2-in-...