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Seasonal variations of the electrostatic potential near auroral low latitudes

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Abstract

Based on the plasma expansion model, the mapping of ionospheric electrostatic potential (field) is derived at the first moments of sunrise and for different seasons, near auroral low latitude regions. For that purpose we considered an ionospheric altitude where one ion species is dominant which is \(\mbox{O}^{+}\) (at \(\sim400~\mbox{km}\)). Fluid equations are transformed into a simplified form by using quasi-neutrality assumption along with a self-similar approach. The qualitative variations of the electrostatic potential during different seasons show that the plasma dynamics depends on the solar activities, included through heavy species collision terms as well as the universal time. The negative electrostatic potential is established at the earlier stages during hotter seasons, while important drops are seen in the cold season.

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Correspondence to Mourad Djebli.

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Mebrek, R., Djebli, M. & Fermous, R. Seasonal variations of the electrostatic potential near auroral low latitudes. Astrophys Space Sci 364, 211 (2019). https://doi.org/10.1007/s10509-019-3702-1

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  • DOI: https://doi.org/10.1007/s10509-019-3702-1

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