Illustration of the two grids used in the model. On the top, the pressure-based input grid (a). On the bottom, the regular altitude grid (b). The location of each of the columns is parameterized by its solar elevation angle, α^*, equal to 90° at the substellar point, 0° at the terminator, and −90° at the subobserver point. β is the angle over which the atmosphere transitions from dayside to nightside temperatures. is the planetary radius at the bottom of the grid. z_i is the altitude of level i, and dz_i is the thickness of layer i between levels i and i + 1.