Io torus plasma transport under interchange instability and flow shears

▸ We make nonlinear MHD simulations of interchange instability at the Io torus. ▸ We estimate time scales of the radial plasma transport and compare the observed ones, 20-80 days. ▸ The calculated time scales in two separate cases are 72 days and 2-3 days. ▸ We thus consider that a middle level between these extreme cases occurs in reality. ▸ We conclude that the radial transport could be controlled by the nonlinear effects of fluids.