Supergranulation rotation

Simple convection models estimate the depth of supergranulation at approxim ately 7500 km which suggests that supergranules would rotate at the rate of the plasma in the outer 1% of the solar radius. The supergranulation rotat ion obtained from MDI dopplergrams shows that supergranules rotate faster t han the outer 5% of the convection zone and show zonal flows matching resul ts from inversions of f-mode splittings. Additionally, the rotation rate de pends on the size scale of the features.