GCM simulation of Wasp-121b (Parmentier et al. 2018) without H₂ dissociation. Temperature (top) and water abundance (bottom) for the equatorial cut (left), limb cut (middle), and pole cut (right). From the center outward, the five solid lines are respectively the 1, 434 × 10⁷, 10³, 1, 10⁻², and 10⁻⁴ Pa pressure levels. The color-coding for the water abundance maps goes from 5 × 10⁻⁴ to 10⁻⁷. The radius of the planet and the atmosphere are shown to scale.