Example structures of β as a function of latitude and longitude. Top row. two examples for a pure diffusive case (no significant longitudinal wind), while the lower panels show two examples for significant longitudinal winds. The red vertical lines indicate the position of the longitude 0, while the blue vertical lines indicate the location of the terminator. For all four cases, we take f_day = 1, n_Φ = 3, where f_day and n_Φ are the efficiency with which the planet absorbs incoming stellar radiation, and the coefficient specifying the latitudinal extent of the longitudinal winds, respectively.