Fig. 14.

Snapshots of the longitudinally averaged toroidal magnetic field (Bϕ) at different stages during half a magnetic cycle, with peak meridional circulation Vθp = 12.5 m s−1. Left column: represents the evolution of the toroidal field for the advection-dominated convection zone (ηc = 2 × 1010 cm2 s−1) where the field is significantly advected in the convection zone. Right column: corresponds to the diffusion-dominated convection zone (ηc = 1011 cm2 s−1) where the diffusion of the field is significant. In the advection-dominated case, the toroidal fields of previous few cycles are also present near the tachocline.
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