Time-averaged meridional circulation profiles ﹩| {\left\langle \tilde{\rho }{{\boldsymbol{u}}}_{{\rm{m}}}\right\rangle }_{t}| \,\rm{sgn}\,({\left\langle {\rm{\Psi }}\right\rangle }_{t})﹩ (see Equations (36) and (37)) for the full simulation suite, plotted in the meridional plane. Red tones indicate clockwise circulation and blue tones indicate counterclockwise circulation. The solid contours mark ﹩{\left\langle {\rm{\Psi }}\right\rangle }_{t}\equiv 0﹩, which are the circulation cell boundaries and also streamlines of u_m. The dashed semicircles mark r = r_bcz.