Large-scale transport of magnetic flux on the sun and flare productivity

Horizontal transport of the large-scale magnetic field during last three solar activity cycles was studied. The specific displacement of the magnetic regions was followed and the horizontal velocity field was inferred. A non-homogeneous transport of the magnetic flux over the solar surface, superposed on the global differential rotation and meridional circulation was considered. Large-scale velocities with the axially symmetric component and also with the large-scale non-axially symmetric component of the horizontal velocity field varies during the 11-year activity cycle. A spatial distribution of the available magnetic energy was computed and the relationship with the flare productivity was found.