Abundance profiles of ¹²CO, CH₄, H₂O, and NH₃, retrieved as part of the quenched (via P_quench) chemical equilibrium retrieval. The short dashed lines show the median quenched profiles used to compute the model spectra. For comparison, we show the un-quenched profiles with long dashes, indicating that CH₄ would become the dominant carbon-bearing species at pressures below ~1 bar in the case of chemical equilibrium. As in Fig. 7, the shaded regions present the 95% confidence envelopes.