Atmospheric diagram (p, T; top panel), (p, y; middle panel), and (p, ρ; bottom panel) for the DRIFT-PHOENIX brown dwarf atmosphere model used in numerical simulations (BD: T_eff = 1500 K, logg = 5.0, published by Stark et al. 2013 and Rodríguez-Barrera et al. 2018). Additional profiles for typical (LD, TD: log (g) = 4.5) and low-gravity (LGLD, LGTD: log (g) = 3.0) L dwarf (T_eff = 2000 K) and T dwarf (T_eff = 1200 K) models are shown for context (see also Table 2.)