Birkeland current effects on high-latitude ground magnetic field perturbations

Magnetic perturbations on ground at high latitudes are directly associated only with the divergence‐free component of the height‐integrated horizontal ionospheric current, J⊥,df. Here we show how J⊥,df can be expressed as the total horizontal current J⊥ minus its curl‐free component, the latter bein...

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Veröffentlicht in:	Geophysical research letters 2015-09, Vol.42 (18), p.7248-7254
Hauptverfasser:	Laundal, K. M., Haaland, S. E., Lehtinen, N., Gjerloev, J. W., Østgaard, N., Tenfjord, P., Reistad, J. P., Snekvik, K., Milan, S. E., Ohtani, S., Anderson, B. J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Alignment Birkeland currents Convection Curl (vectors) Current distribution Darkness Divergence Equivalence ground magnetic field Grounds Height Horizontal ionospheric convection ionospheric currents Latitude Magnetic field Magnetic fields Perturbation Perturbations Polar caps seasonal differences Sunlight
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