JIM: A time‐dependent, three‐dimensional model of Jupiter's thermosphere and ionosphere

摘要: We present the Jovian Ionospheric Model (JIM), a time-dependent, three-dimensional model for thermosphere and ionosphere of Jupiter. describe physical inputs hydrodynamic, thermodynamic chemical components model, which is based on UCL Thermosphere Fuller-Rowell Rees [1980]. then results an illustrative simulation in initially neutral homogeneous planet evolves approximately 4 rotations, under influence solar illumination auroral (electron) precipitation at high latitudes. The shows that zenith angle, activity, ion recombination chemistry and, to lesser degree, magnetic field orientation, all play role forming dayside nightside global ionization patterns. compare nonauroral/equatorial ionospheric compositions find signature transport by fast winds. also include localized spot' our comment associated signatures develop response this To-like aurora. develops strong outflows with velocities up ∼600 m s -1 from regions, driven mainly pressure gradients. These gradients, turn, arise differences composition between nonauroral upper thermospheres, as evolution proceeds. This preliminary study indicates potential JIM analysis two-dimensional image data time-dependent events.