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| Titel |
Validation of a new plasmapause model derived from CHAMP field-aligned current signatures |
| VerfasserIn |
Balázs Heilig, Fabien Darrouzet, Massimo Vellante, János Lichtenberger, Hermann Lühr |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250090070
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| Publikation (Nr.) |
 EGU/EGU2014-4285.pdf |
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| Zusammenfassung |
| Recently a new model for the plasmapause location in the equatorial plane was introduced
based on magnetic field observations made by the CHAMP satellite in the topside ionosphere
(Heilig and Lühr, 2013). Related signals are medium-scale field-aligned currents (MSFAC)
(some 10km scale size). An empirical model for the MSFAC boundary was developed as a
function of Kp and MLT. The MSFAC model then was compared to in situ plasmapause
observations of IMAGE RPI. By considering this systematic displacement resulting from this
comparison and by taking into account the diurnal variation and Kp-dependence of the
residuals an empirical model of the plasmapause location that is based on MSFAC
measurements from CHAMP was constructed. As a first step toward validation of the new
plasmapause model we used in-situ (Van Allen Probes/EMFISIS, Cluster/WHISPER) and
ground based (EMMA) plasma density observations. Preliminary results show a
good agreement in general between the model and observations. Some observed
differences stem from the different definitions of the plasmapause. A more detailed
validation of the method can take place as soon as SWARM and VAP data become
available.
Heilig, B., and H. Lühr (2013) New plasmapause model derived from CHAMP field-aligned
current signatures, Ann. Geophys., 31, 529-539, doi:10.5194/angeo-31-529-2013 |
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