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: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
1999-07-01
|
| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/17/913/1999/angeo-17-913-1999.pdf |
| id |
doaj-584d7fb3125b4bfaa68b1d388c5f028f |
|---|---|
| record_format |
Article |
| spelling |
doaj-584d7fb3125b4bfaa68b1d388c5f028f2020-11-24T22:54:28ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05761999-07-011791391810.1007/s00585-999-0913-8On the variability of I(7620 Å)/I(5577 Å) in low altitude auroraE. J. Llewellyn0E. J. Llewellyn1R. L. Gattinger2A. Vallance Jones3E-mail: llewellyn@skisas.usask.caInstitute of Space and Atmospheric Studies, Department of Physics and Engineering Physics, 116 Science Place, University of Saskatchewan, Saskatoon, SK S7N 5E2, CanadaInstitute of Space and Atmospheric Studies, Department of Physics and Engineering Physics, 116 Science Place, University of Saskatchewan, Saskatoon, SK S7N 5E2, CanadaCanadian Space Agency, Ottawa, CanadaAn 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)https://www.ann-geophys.net/17/913/1999/angeo-17-913-1999.pdf |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
E. J. Llewellyn E. J. Llewellyn R. L. Gattinger A. Vallance Jones |
| spellingShingle |
E. J. Llewellyn E. J. Llewellyn R. L. Gattinger A. Vallance Jones On the variability of I(7620 Å)/I(5577 Å) in low altitude aurora Annales Geophysicae |
| author_facet |
E. J. Llewellyn E. J. Llewellyn R. L. Gattinger A. Vallance Jones |
| author_sort |
E. J. Llewellyn |
| title |
On the variability of I(7620 Å)/I(5577 Å) in low altitude aurora |
| title_short |
On the variability of I(7620 Å)/I(5577 Å) in low altitude aurora |
| title_full |
On the variability of I(7620 Å)/I(5577 Å) in low altitude aurora |
| title_fullStr |
On the variability of I(7620 Å)/I(5577 Å) in low altitude aurora |
| title_full_unstemmed |
On the variability of I(7620 Å)/I(5577 Å) in low altitude aurora |
| title_sort |
on the variability of i(7620 å)/i(5577 å) in low altitude aurora |
| publisher |
Copernicus Publications |
| series |
Annales Geophysicae |
| issn |
0992-7689 1432-0576 |
| publishDate |
1999-07-01 |
| description |
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) |
| url |
https://www.ann-geophys.net/17/913/1999/angeo-17-913-1999.pdf |
| work_keys_str_mv |
AT ejllewellyn onthevariabilityofi7620ai5577ainlowaltitudeaurora AT ejllewellyn onthevariabilityofi7620ai5577ainlowaltitudeaurora AT rlgattinger onthevariabilityofi7620ai5577ainlowaltitudeaurora AT avallancejones onthevariabilityofi7620ai5577ainlowaltitudeaurora |
| _version_ |
1725659680304267264 |