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| Titel |
Tidal variations of O2 Atmospheric and OH(6-2) airglow and temperature at mid-latitudes from SATI observations |
| VerfasserIn |
M. J. López-González, E. Rodríguez, G. G. Shepherd, S. Sargoytchev, M. G. Shepherd, V. M. Aushev, S. Brown, M. García-Comas, R. H. Wiens |
| 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 ; 23, no. 12 ; Nr. 23, no. 12 (2005-12-23), S.3579-3590 |
| Datensatznummer |
250015425
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| Publikation (Nr.) |
 copernicus.org/angeo-23-3579-2005.pdf |
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| Zusammenfassung |
| 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. |
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