  We extend earlier models of turbulent dynamos with an upper, nearly
force-free exterior to spherical geometry, and study how flux emerges from
lower layers to the upper ones without being driven by magnetic buoyancy. We
also study how this affects the possibility of plasmoid ejection. A spherical
wedge is used that includes northern and southern hemispheres up to
mid-latitudes and a certain range in longitude of the Sun. In radius, we cover
both the region that corresponds to the convection zone in the Sun and the
immediate exterior up to twice the radius of the Sun. Turbulence is driven with
a helical forcing function in the interior, where the sign changes at the
equator between the two hemispheres. An oscillatory large-scale dynamo with
equatorward migration is found to operate in the turbulence zone. Plasmoid
ejections occur in regular intervals, similar to what is seen in earlier
Cartesian models. These plasmoid ejections are tentatively associated with
coronal mass ejections. The magnetic helicity is found to change sign outside
the turbulence zone, which is in agreement with recent findings for the solar
wind.
