  The ion temperature of the magnetosphere of Jupiter derived from Galileo PLS
data was observed to increase by about an order of magnitude from 10 to 40
Jupiter radii. This suggests the presence of heating sources that counteract
the adiabatic cooling effect of expanding plasma. There have been different
attempts of explaining this phenomena, including a magnetohydrodynamic (MHD)
turbulent heating model which is based on flux tube diffusion [Saur, Astrophys.
J. Lett., 602, L137, 2004]. We explore an alternate turbulent heating model
based on advection, similar to models commonly used in solar wind heating.
Based on spectral analysis of Galileo magnetometer (MAG) data, we find that
observed MHD turbulence could potentially provide the required heating to
explain some of the increase in plasma temperature. This indicates that
advection is a more appropriate way to describe radial transport of plasma in
the jovian magnetosphere beyond 10 Jupiter radii.
