Figure 5.

A) The ionizing electron flux at 160 km as a function of magnetic field strength and evation angle. Ionizing electron fluxes are smaller in strong crustal field regions except for a few instances when the magnetic field has a significant radial component and the elevation angle exceeds 45°. B-E) Ion densities at 160 km as a function of magnetic field strength and the ionizing electron flux. The ${\text{CO}}_2^{+}$ and O⁺ densities are significantly smaller in strong crustal field regions when the ionizing electron flux is low. The ${\text{O}}_2^{+}$ and NO⁺ densities are also smaller in strong crustal field regions, but to a lesser extent. F) The NO⁺/${\text{O}}_2^{+}$ ratio as a function of magnetic field strength and ionizing electron flux. The ratio increases with magnetic field strength