Tidal variations of O2 Atmospheric and OH(6-2) airglow and temperature at mid-latitudes from SATI observations
| Autor: | López-González, M. J., Rodriguez, Elizandro, Shepherd, G. G., Sargoytchev, S., Shepherd, M. G., Aushev, V. M., Brown, S., Garcia-Comas, M., Wiens, R. H. |
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| Přispěvatelé: | EGU, Publication, Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Centre for Research in Earth and Space Science [Toronto] (CRESS), York University [Toronto], Institute of Ionosphere, Ministry of Education and Science, Department of Physics, University of Asmara |
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere [SDU.OCEAN] Sciences of the Universe [physics]/Ocean Atmosphere lcsh:QC801-809 [SDU.STU]Sciences of the Universe [physics]/Earth Sciences lcsh:QC1-999 Physics::Geophysics lcsh:Geophysics. Cosmic physics [SDU.STU] Sciences of the Universe [physics]/Earth Sciences lcsh:Q Astrophysics::Earth and Planetary Astrophysics lcsh:Science Physics::Atmospheric and Oceanic Physics Astrophysics::Galaxy Astrophysics lcsh:Physics |
| Zdroj: | Annales Geophysicae, Vol 23, Iss 12, Pp 3579-3590 (2005) Annales Geophysicae, Vol 23, Pp 3579-3590 (2005) Annales Geophysicae Annales Geophysicae, European Geosciences Union, 2005, 23 (12), pp.3579-3590 |
| ISSN: | 1432-0576 0992-7689 1998-2003 |
| Popis: | International audience; Airglow observations with a Spectral Airglow Temperature Imager (SATI), installed at the Sierra Nevada Observatory (37.06° N, 3.38° W) at 2900-m height, have been used to investigate the presence of tidal variations at mid-latitudes in the mesosphere/lower thermosphere region. Diurnal variations of the column emission rate and vertically averaged temperature of the O2 Atmospheric (0-1) band and of the OH Meinel (6-2) band from 5 years (1998-2003) of observations have been analysed. From these observations a clear tidal variation of both emission rates and rotational temperatures is inferred. It is found that the amplitude of the daily variation for both emission rates and temperatures is greater from late autumn to spring than during summer. The amplitude decreases by more than a factor of two during summer and early autumn with respect to the amplitude in the winter-spring months. Although the tidal modulations are preferentially semidiurnal in both rotational temperatures and emission rates during the whole year, during early spring the tidal modulations seem to be more consistent with a diurnal modulation in both rotational temperatures and emission rates. Moreover, the OH emission rate from late autumn to early winter has a pattern suggesting both diurnal and semidiurnal tidal modulations. |
| Databáze: | OpenAIRE |
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