[malfist]

Wow, how did I manage that. My numbers are all off by 100x.

So that means they're saying the ocean is 4% CO2? That would mean the ocean has more CO2 than salt (3.5% or 35 ppt)

[Aperocky]

Ocean is also about 1000x as dense as air, so it only needs 40ppm of CO2 to be 100x more concentrated as air.