On the variability of I(7620 Å)/I(5577 Å) in low altitude aurora
An auroral electron excitation model, combined with simple equilibrium neutral and ion chemistry models, is used to investigate the optical emission processes and height profiles of I(5577 Å) and I(7620 Å) in the 90 to 100 km altitude region. It is shown that the apparent discrepancies between g...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
1999-07-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/17/913/1999/angeo-17-913-1999.pdf |
| Summary: | An auroral electron excitation model,
combined with simple equilibrium neutral and ion chemistry models, is used to
investigate the optical emission processes and height profiles of I(5577 Å) and
I(7620 Å) in the 90 to 100 km altitude region. It is shown that the apparent
discrepancies between ground-based and rocket-borne auroral observations of the
I(7620 Å)/I(5577 Å) ratio are due to the extreme height variation of this
intensity ratio in the 90 to 100 km region.<br><br><b>Key words. </b>Atmospheric composition and structure
(airglow and aurora) |
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| ISSN: | 0992-7689 1432-0576 |