Thermal structure of the volatile layer of a 5 m_E exoplanet with 1 wt% of H/He, for various equilibrium temperatures. The coldest equilibrium temperature T_eq was chosen to be 50 K, then from T_eq = 100 K a profile was calculated every 200 K until T_eq = 1500 K. Solid lines: the structure calculated using model D by Parmentier & Guillot (2014). Dashed lines: the atmosphere structure calculated using the model of Jin et al. (2014), which is also used in D17.