I am modeling the atmospheres of some known Super-Earths as part of a small project. One of the input parameters is the atmospheric pressure at sea level. I constructed the plot below to show that these planets are able to maintain carbon dioxide, water vapor, and diatomic nitrogen, and most of them can even maintain helium. Based on this, I think it would be reasonable to use a value of 1 bar for the two planets below the helium line, 2 bar for the ones above the hydrogen line, and 1.5 bar for the other ones. If not these exact values, at least this kind of progression, since planets found in the upper part of the plot can maintain thicker atmospheres. Is this a reasonable idea? Does anyone have references regarding this topic?