Snapshots of the latitudinally (left) or longitudinally (right) averaged T–P profile for two evolved models of Kepler-13Ab (top) and KELT-1b (bottom), both with a very shallow horizontal convergence pressure, at various longitudes or latitudes, respectively. These models have been selected in order to match either the observed radius of the brown dwarf (KELT-1b), or the minimum deep atmosphere temperatures required to explain a water absorption feature in the brown dwarf spectra (Kepler-13Ab); see Sect. 2 for more details.