True, but going to a higher altitude will bring the CO[sub]2[/sub] level down enough to be uncomfortable, but survivable.The CO[sub]2[/sub]levels are also quite toxic.
I am pretty sure that is due to the partial pressure of oxygen being too low when you reach that altitude on Earth, not an effect of the total pressure. For reference, in mountaineering HAPE and HACE can be avoided, or improved, by administering oxygen without requiring descent or pressurization (although descent is the better choice if possible).
That's roughly as high (elevation-wise) as humans can live permanently (maybe even a bit too high), but the Armstrong limit is much higher. I think we might still be confusing the effects of total pressure vs. partial O2 pressure.
What about "The Red Stone Planet"? Or how about "Terra Purpura"?What do you think I should call it?
While those are the requirements for a comfortable planet, you can still survive in more extreme environments.Here is the full list of requirements:
Pressure above 0.3 atmospheres
Between 0.1 and 0.8 bars of oxygen
less than 0.01 atmospheres of CO2
Temperature between -80 and 110 Fahrenheit
Less than 5 ppm of SO2
Less than 50 ppm of H2S
Star mass above 0.8 Solar masses (anything less massive would have atmosphere-destroying flare-ups in real life), below 2 Solar masses
System not located in a galactic core or cluster(open or globular)
System is not multiple-star
Well, the problem with the sulfur dioxide is that even a tiny amount in the atmosphere can be harmful over an extended period of time, and the toxicity is measured by concentration, not partial pressure. 100ppm is lethal in minutes, 50ppm is lethal in a few days, and anything above 5ppm can eventually cause permanent damage if inhaled continuously. Even down to 1ppm, it would smell pretty badly.While those are the requirements for a comfortable planet, you can still survive in more extreme environments.Here is the full list of requirements:
Pressure above 0.3 atmospheres
Between 0.1 and 0.8 bars of oxygen
less than 0.01 atmospheres of CO2
Temperature between -80 and 110 Fahrenheit
Less than 5 ppm of SO2
Less than 50 ppm of H2S
Star mass above 0.8 Solar masses (anything less massive would have atmosphere-destroying flare-ups in real life), below 2 Solar masses
System not located in a galactic core or cluster(open or globular)
System is not multiple-star
It would probably be more like:
Pressure above 0.1 atmospheres
Between 0.1 and 0.6 atms of O[sub]2[/sub]
less than 0.04 atmospheres of CO[sub]2[/sub]
Temperature between -90 and 50 C
Less than 10[sup]-5[/sup] atm of SO[sub]2[/sub]
etc...