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| Titel |
Climatology of planetary wave type oscillations with periods of 2-20 days derived from O2 atmospheric and OH(6-2) airglow observations at mid-latitude with SATI |
| VerfasserIn |
M. J. López-González, E. Rodríguez, M. García-Comas, V. Costa, M. G. Shepherd, G. G. Shepherd, V. M. Aushev, S. Sargoytchev |
| 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 ; 27, no. 9 ; Nr. 27, no. 9 (2009-09-30), S.3645-3662 |
| Datensatznummer |
250016658
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| Publikation (Nr.) |
 copernicus.org/angeo-27-3645-2009.pdf |
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| Zusammenfassung |
The presence of planetary wave type oscillations
at mid-latitudes in the mesosphere/lower thermosphere region has been
investigated using airglow observations.
The observations were taken with a Spectral Airglow Temperature Imager
(SATI)
installed
at Sierra Nevada
Observatory (37.06° N, 3.38° W) at 2900 m height.
Airglow data of the column emission
rate of the O2
Atmospheric (0-1) band and of the OH Meinel (6-2) band
and deduced rotational temperatures from 1998 to 2007
have been used in this study.
From these observations a climatology of planetary wave type oscillations
at this location is inferred.
It has been found that
the planetary wave type oscillations of 5-day period
is predominant in our data
throughout the year, with activity greater than 50% during March/April
and October/November months.
The planetary wave type oscillations of 2-day period is predominant
during both solstices, being predominant during winter solstice in O2
while a 10-day oscillation appears throughout the year
with activity around 20%
and with maximum activity during spring and autumn equinoxes.
The 16-day oscillation
has maximum occurrence during autumn-winter while its activity is almost
disappeared during
spring-summer.
No clear seasonal dependence of the amplitude of the planetary
wave type oscillations was observed in the cases considered in this study.
The waves simultaneously detected in the rotational temperatures deduced
from both OH and O2 emissions usually show an upward energy propagation
and are affected by dissipation processes. |
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