  Analyses of recent helioseismic data indicate that the dynamical regimes at
the base of the convection zone can be different from those observed at the
top, having either significantly shorter periods or non--periodic behaviour.
  Recently spatiotemporal fragmentation/bifurcation has been proposed as a
dynamical mechanism to account for the multi-mode behaviour that is possibly
observed in the solar convection zone, without requiring separate physical
mechanisms with different time scales at different depths.
  Here we study the robustness of this mechanism with respect to changes to the
zero order rotation profile, motivated by the uncertainties of and differences
between the various reductions of the helioseimic data. We find that
spatiotemporal fragmentation is a common feature of the reductions investigated
