The planet I am making is a super Earth,a celestial body slightly larger than Earth, but not big enough to be considered a gas or ice giant.>

The atmosphere is the most important so here it is:

  • The atmosphere I am taking inspiration from is from the Carboniferous and Cretaceous period.
  • A warm/hot, wet climate is intended, although deserts and glaciers would be acceptable

Is this possible with the following atmospheric composition?

  • Oxygen: 30%
  • Carbon Dioxide:10%
  • Nitrogen: 60%
  • Argon: 0.9%
  • 1
    $\begingroup$ What makes you think that you couldn't have a hot wet climate with that particular mix of gasses? No matter where you are on Earth the mix of gasses is the same and depending on where you are it can be hot and wet; cold and wet; hot and dry; or cold and dry. Your atmospheric composition seems to be about what it was like on the Earth during the Cretaceous. Your planet is earthlike. Seems like it's trivially obvious what the climate would be like. I'm unsure what you are looking for from us? $\endgroup$
    – sphennings
    Sep 10, 2022 at 2:43
  • $\begingroup$ Hang on, that's nearly 10% of the atmosphere unaccounted for. Apart from that the question is fully answerable, so I'm voting to leave open in faith that that detail can be added, and won't change anything major. $\endgroup$ Sep 10, 2022 at 4:20
  • $\begingroup$ I looked up what the carbon was like in the carbonerfeious period and it gave me 2,000 pmv,I couldent figure out the percantage so i hope you guys would,but ill just put down my estimated Guess for the carbon. $\endgroup$ Sep 10, 2022 at 16:07
  • $\begingroup$ Bear in mind the "m" in ppm is million. So out of every million parts of other gases, CO2 is 2000. That's 0.2%, not 10%. $\endgroup$
    – jdunlop
    Sep 10, 2022 at 17:45
  • 1
    $\begingroup$ 7-10% carbon dioxide will suffocate humans, even 1% is bad news - not sure about the animals of the Carboniferous, since they aren't available to run tests on! So re-think that part of the atmosphere, since at the moment the percentages add up to 100.9% and include that lethal level of CO2. $\endgroup$ Mar 30 at 5:20


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