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| Titel |
Middle ultraviolet remote sensing of the equatorial thermosphere during a geomagnetic storm |
| VerfasserIn |
A. W. Stephan, K. F. Dymond, S. A. Budzien, R. P. McCoy |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 9 ; Nr. 22, no. 9 (2004-09-23), S.3203-3209 |
| Datensatznummer |
250015000
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| Publikation (Nr.) |
 copernicus.org/angeo-22-3203-2004.pdf |
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| Zusammenfassung |
| We present measurements of the equatorial middle ultraviolet airglow taken during
the week of 21-28 May 2000, including a strong geomagnetic storm on 24 May. Limb spectra were
taken by the Ionospheric Spectroscopy and Atmospheric Chemistry (ISAAC) experiment on the
Advanced Research and Global Observation Satellite (ARGOS). OII lines
near 247.0nm and NII lines near 214.3nm provide a measure of thermospheric O and N2
changes, respectively.
Our results show increases in airglow brightness of both emissions during the storm that
we interpret as increases in the concentrations of both species, but the
ratio of intensities that correspond to O/N2
is lower than expected
during and after the storm. We also invert the emission profiles using discrete
inverse theory, to obtain a measure of thermospheric neutral temperatures during this time. Although
temperatures increase after the main phase of the storm, the increases do not correlate with
the observed features in the intensity ratio. These data could be explained by
vertical winds and tides modifying the equatorial neutral composition during
storms, in addition to common heating responses. |
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