Chemical abundance profiles of H₂O, CO, CH₄, CO₂, N₂, and NH₃ of self-consistent ATMO models generated under the assumption of chemical equilibrium (solid lines) and non-equilibrium chemistry due to vertical mixing (dashed lines). Non-equilibrium models are calculated with the strong K_zz mixing relationship with surface gravity, as shown in Fig. 1. Rows: models with different effective temperatures, columns: models with different surface gravities, as indicated in the plot titles. In the top left T_eff = 800 K, log (g) = 3.5 plot, the non-equilibrium abundance of CH₄ lies below the N₂ abundance.