  In the paper we study the helicity density patterns which can result from the
emerging bipolar regions. Using the relevant dynamo model and the magnetic
helicity conservation law we find that the helicity density pattern around the
bipolar regions depends on the configuration of the ambient large-scale
magnetic field, and in general they show the quadrupole distribution. The
position of this pattern relative to the equator can depend on the tilt of the
bipolar region. We compute the time-latitude diagrams of the helicity density
evolution. The longitudinally averaged effect of the bipolar regions show two
bands of sign for the density distribution in each hemisphere. Similar helicity
density patterns are provided by the helicity density flux from the emerging
bipolar regions subjected to the surface differential rotation. Examining
effect of helicity fluxes from the bipolar regions on the large-scale dynamo we
find that its effect to the dynamo saturation is negligible.

Solar and Stellar Astrophysics