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- Title
Seasonal variations of the electrostatic potential near auroral low latitudes.
- Authors
Mebrek, Rima; Djebli, Mourad; Fermous, Rachid
- 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 O + (at ∼ 400 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.
- Subjects
ELECTRIC potential; SEASONAL temperature variations; SOLAR activity; PLASMA dynamics; LATITUDE; HELIOSEISMOLOGY
- Publication
Astrophysics & Space Science, 2019, Vol 364, Issue 11, p1
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-019-3702-1