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| Titel |
Auroral electron fluxes and characteristic energy of precipitating electrons inferred by ALIS and EISCAT |
| VerfasserIn |
C. L. Simon Wedlund, H. Lamy, B. Gustavsson, T. Sergienko, U. Brandstrom, J. De Keyser |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250069744
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| Zusammenfassung |
| Auroral electron fluxes are retrieved by two different methods: firstly from inversion of
EISCAT-observed electron density profiles and secondly from inversion of the N2+(4278Å)
band auroral emission profile reconstructed from observations with the Auroral Large
Imaging System (ALIS) in Scandinavia. Coordinated campaigns took place in March 2008
and provide a unique opportunity to study the characteristics of the evolution of an auroral
arc.
A bright and stable arc on 05 March 2008 is presented as a case study. Characteristic
energies of the precipitating electrons are inferred from ALIS observations both across and
along the arc. Where EISCAT is observing, i.e., along the magnetic field line, the retrieved
characteristic energies are in good agreement. The arc width and its dependence with auroral
emissions (either O I 6300, 5577, 8846ÅÂ and N2 II 4278 Å) are also discussed
in light of transport kinetic simulations such as TRANS4 (Simon et al., 2007). |
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