The interhemispheric and F region dynamo currents revisited with the Swarm constellation

Hermann Luehr, Guram Kervalishvili, Ingo Michaelis, Jan Rauberg, Patricia Ritter, Jaeheung Park, José M.G. Merayo, Peter Brauer

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Based on magnetic field data sampled by the Swarm satellite constellation it is possible for the first time to determine uniquely F region currents at low latitudes. Initial results are presented from the first 200days of formation flight (17 April to 5 November 2014). Detailed results have been obtained for interhemispheric field-aligned currents connecting the solar quiet day magnetic variation (Sq) current systems in the two hemispheres. We obtain prominent currents from the Southern (winter) Hemisphere to the Northern around noon. Weaker currents in opposite direction are observed during morning and evening hours. Furthermore, we could confirm the existence of vertical currents above the dip equator, downward around noon and upward around sunset. For both current systems we present and discuss longitudinal variations.
    Original languageEnglish
    JournalGeophysical Research Letters
    Volume42
    Issue number9
    Pages (from-to)3069-3075
    ISSN0094-8276
    DOIs
    Publication statusPublished - 2015

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