Relative contributions of large-scale and wedgelet currents in the substorm current wedge.
Bursty bulk flow (BBF)
Field-aligned current (FAC)
Plasma sheet
Substorm current wedge (SCW)
Westward traveling surge (WTS)
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:
2020
2020
Historique:
received:
07
05
2020
accepted:
14
07
2020
entrez:
31
7
2020
pubmed:
31
7
2020
medline:
31
7
2020
Statut:
ppublish
Résumé
We examined how much large-scale and localized upward and downward currents contribute to the substorm current wedge (SCW), and how they evolve over time, using the THEMIS all-sky imagers (ASIs) and ground magnetometers. One type of events is dominated by a single large-scale wedge, with upward currents over the surge and broad downward currents poleward-eastward of the surge. The other type of events is a composite of large-scale wedge and wedgelets associated with streamers, with each wedgelet having comparable intensity to the large-scale wedge currents. Among 17 auroral substorms with wide ASI coverage, the composite current type is more frequent than the single large-scale wedge type. The dawn-dusk size of each wedgelet is ~ 600 km in the ionosphere (~ 3.2
Identifiants
pubmed: 32728343
doi: 10.1186/s40623-020-01234-x
pii: 1234
pmc: PMC7373217
doi:
Types de publication
Journal Article
Langues
eng
Pagination
106Informations de copyright
© The Author(s) 2020.
Déclaration de conflit d'intérêts
Competing interestsThe authors declare that they have no competing interests.
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