5 ms·
I'm under the impression that a higher prehistorical concentration of oxygen in the atmosphere is widely accepted at this point. Higher atmospheric pressure is
by curtis 8y ago
I'm under the impression that a higher prehistorical concentration of oxygen in the atmosphere is widely accepted at this point. Higher atmospheric pressure is not something I've heard anything about though.
Wikipedia has a nice graph showing high and low estimates for the historical oxygen level: https://en.wikipedia.org/wiki/Geological_history_of_oxygen#/media/File:Oxygenation-atm-2.svg https://en.wikipedia.org/wiki/Geological_history_of_oxygen#/....
- marcosdumay 8y agoI don't think anybody is claiming that Earth gained extra nitrogen (how would it?). So, while it lost oxygen, it also had to lose some air pressure. I imagine there was some huge pressure loss at the oxygen catastrophe.
- int_19h 8y agoYou also need to account for CO2.
- marcosdumay 8y agoThere is almost no CO2 on the atmosphere.
- Rhinobird 8y agoMy thought would be, when the asteroid hit, it blew away a large chunk of atmosphere with it.