Comparison of shell current distribution inside the ionosphere during quiet and disturbed periods.

Romashets and Vandas [2020, 2022] determined Euler potentials for field aligned currents (FACs) above the ionosphere. A parameter g was introduced, which determines the current density of FACs locally. The situation g=const was modeled in Romashets and Vandas [2025] for finding vertical distribution of shell currents in the ionosphere. The consideration of non-constant g is more complicated. We will present results for the shell current density and magnetic field, as well as Euler potentials inside the ionosphere with a realistic g determined from FAC data from Korth et al. [2010] for quiet and disturbed periods. This research was supported by the NSF grant 2230363. M. V. acknowledges support from the AV CR grant RVO:67985815.

References

Romashets, E. and Vandas, M., 2020, Euler potentials for the Earth magnetic field with field-aligned currents, Journal of Geophysical Research, 125, 8, e28153. doi:10.1029/2020JA028153.

Romashets, E. and Vandas, M., 2022, Euler Potentials for Dungey magnetosphere with axisymmetric ring and field-aligned currents, Journal of Geophysical Research, 127, 3, e30171. doi:10.1029/2021JA030171.

Romashets, E., and Vandas, M., 2025, Determination of vertical profiles of shell currents in the ionosphere. Annales Geophysicae. doi:10.5194/angeo-2024-22.

Korth, H., Anderson, B. J., Waters, C. L, 2010, Statistical analysis of the dependence of large-scale Birkeland currents on solar wind parameters. Annales Geophysicae. 28, 515–530.