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  Field‐Aligned Currents in the Magnetosphere–Ionosphere

Lühr, H., Kervalishvili, G. (2021): Field‐Aligned Currents in the Magnetosphere–Ionosphere. - In: Maggiolo, R., André, N., Hasegawa, H., Welling, D. T., Zhang, Y., Paxton, L. J. (Eds.), Magnetospheres in the Solar System, (Geophysical Monograph Series ; 259), Wiley, 193-205.
https://doi.org/10.1002/9781119815624.ch13

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 Urheber:
Lühr, H.1, Autor              
Kervalishvili, G.1, Autor              
Affiliations:
12.3 Geomagnetism, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146030              

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Schlagwörter: climatological features; current density; field‐aligned currents; magnetized plasmas; magnetosphere‐ionosphere; near‐Earth space
 Zusammenfassung: Field‐aligned currents play a major role in magnetized plasmas. They are the main agents for coupling the dynamics between magnetosphere and ionosphere. Perturbations of magnetic field distribution, plasma pressure or flow on one end are communicated by field‐aligned currents along the whole flux tube. Furthermore, they transport energy, practically lossless, from dynamo regions in the magnetosphere into the upper atmosphere. The knowledge of field‐aligned current distribution is therefore of great interest for understanding the magnetosphere‐ionosphere system. In this chapter we describe the expressions that illustrate the relationship between plasma motion in the magnetosphere and electric currents flowing along the background magnetic field. These currents can only be sensed above the ionospheric E‐layer, e.g. by low‐Earth orbiting satellites. However, to obtain reliable current density estimates is quite challenging. In a climatological sense, field‐aligned currents appear along two concentric rings in the high‐latitude ionosphere with opposite flow directions. Details of these patterns are controlled by the orientation of the interplanetary magnetic field. The transverse scale sizes determine important characteristics of field‐aligned currents.

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Sprache(n): eng - Englisch
 Datum: 2021-05-072021-04-23
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: GFZPOF: p4 T1 Atmosphere
DOI: 10.1002/9781119815624.ch13
 Art des Abschluß: -

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Titel: Magnetospheres in the Solar System
Genre der Quelle: Buch
 Urheber:
Maggiolo, Romain1, Herausgeber
André, Nicolas1, Herausgeber
Hasegawa, Hiroshi1, Herausgeber
Welling, Daniel T.1, Herausgeber
Zhang, Yongliang1, Herausgeber
Paxton, Larry J.1, Herausgeber
Affiliations:
1 External Organizations, ou_persistent22            
Ort, Verlag, Ausgabe: Wiley
Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: 193 - 205 Identifikator: ISBN: 9781119815624
ISBN: 9781119507529

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Titel: Geophysical Monograph Series
Genre der Quelle: Reihe
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Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 259 Artikelnummer: - Start- / Endseite: - Identifikator: -