Left: pressure at the bottom of the atmosphere p_boA for various cases referring to different initial volatile abundances and three different mantle buffers: reduced (IW-4), IW, and oxidized (IW+4). The details of speciation for various cases on the x-axis are shown in Table B.1 (T_s = 3300 K) and Table B.2 (T_s = 1650 K) in the Appendix B. The horizontal dashed black line indicates the total surface pressure of the initial outgassed volatile for the various cases. Right: outgoing longwave radiation (OLR) for various cases corresponding to the atmospheric surface pressure shown in the left panels and for three different buffers.