On the relationship between energy input to the ionosphere and the ion outflow flux under different solar zenith angles.
Auroral ion outflow
Auroral precipitation
Cleft ion fountain
FAST satellite
Ion beams
Ion conics
Polar ionosphere
Journal
Earth, planets, and space : EPS
ISSN: 1343-8832
Titre abrégé: Earth Planets Space
Pays: Germany
ID NLM: 101691465
Informations de publication
Date de publication:
2021
2021
Historique:
received:
31
03
2021
accepted:
17
10
2021
entrez:
18
11
2021
pubmed:
19
11
2021
medline:
19
11
2021
Statut:
ppublish
Résumé
The ionosphere is one of the important sources for magnetospheric plasma, particularly for heavy ions with low charge states. We investigate the effect of solar illumination on the number flux of ion outflow using data obtained by the Fast Auroral SnapshoT (FAST) satellite at 3000-4150 km altitude from 7 January 1998 to 5 February 1999. We derive empirical formulas between energy inputs and outflowing ion number fluxes for various solar zenith angle ranges. We found that the outflowing ion number flux under sunlit conditions increases more steeply with increasing electron density in the loss cone or with increasing precipitating electron density (> 50 eV), compared to the ion flux under dark conditions. Under ionospheric dark conditions, weak electron precipitation can drive ion outflow with small averaged fluxes (~ 10
Identifiants
pubmed: 34790028
doi: 10.1186/s40623-021-01532-y
pii: 1532
pmc: PMC8572202
doi:
Types de publication
Journal Article
Langues
eng
Pagination
202Subventions
Organisme : Intramural NASA
ID : 80NSSC19K0073
Pays : United States
Informations de copyright
© The Author(s) 2021.
Déclaration de conflit d'intérêts
Competing interestsThe authors declare that they have no competing interests.
Références
Phys Rev Lett. 2004 Oct 22;93(17):175001
pubmed: 15525083
J Geophys Res Space Phys. 2015 Jun;120(6):4656-4668
pubmed: 26937329
J Geophys Res Space Phys. 2018 Apr;123(4):2851-2871
pubmed: 33510994
Earth Planets Space. 2020;72(1):111
pubmed: 32831576
Science. 2011 Jun 3;332(6034):1183-6
pubmed: 21636770