Figure 5. Acceleration processes of superrotation due to (a) large-scale convection, (b) thermal tides, (c) equatorial Kelvin waves, and (d) Gierasch–Rossow–Williams mechanism. The yellow circle and shade represent the areas of cloud-level superrotation and near-surface subrotation, respectively. The red arrows are eddy angular momentum fluxes and the light blue arrows are angular momentum fluxes due to the meridional circulation (purple). Eq = equator; P = pole.