Left: linear rotational velocity Ω(r)r and rotation rate Ω(r)R_⊙ vs. radial distance from solar center at solar equator obtained from a global-mode inversion (Larson & Schou 2018). Right: vertical average of rotation rate Ω(r)R_⊙ between base of supergranule and solar surface vs. kR_⊙, for various α values (see text for definitions of u₂ and α). Also shown is u_x plus tracking speed (2034 m s⁻¹) from supergranular power spectrum fits (TD and LCT fast tracking). We note that the y-axis range is different in both panels.