The Role of Periodic Loading-Unloading in the Magnetotail vs IMF Bz Flipping in the Ring Current Buildup

We use the global MHD code BATS-R-US output to drive Fok Ring Current (FRC) model. Introducing of kinetic corrections to BATS-R-US code in the magnetotail region leads to fast reconnection rates observed in kinetic simulations and quasi-periodic loading-unloading cycles in the magnetotail during a long period of steady southward IMF B_z. Running of FRC model in this case correspondingly leads to quasi-periodic oscillations of geosynchronous energetic particle fluxes, similar to "sawtooth" profile injections. We compare these results with the results of the FRC model driven by BATS-R-US code for periodically flipping IMF B_z component, without kinetic corrections.