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| Titel |
Rayleigh LIDAR and satellite (HALOE, SABER, CHAMP and COSMIC) measurements of stratosphere-mesosphere temperature over a southern sub-tropical site, Reunion (20.8° S; 55.5° E): climatology and comparison study |
| VerfasserIn |
V. Sivakumar, P. Vishnu Prasanth, P. Kishore, H. Bencherif, P. Keckhut |
| 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 ; 29, no. 4 ; Nr. 29, no. 4 (2011-04-12), S.649-662 |
| Datensatznummer |
250017001
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| Publikation (Nr.) |
 copernicus.org/angeo-29-649-2011.pdf |
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| Zusammenfassung |
| For the first time, climatology of the middle atmosphere thermal structure
is presented, based on 14 years of LIDAR and satellite (HALOE, SABER, CHAMP
and COSMIC) temperature measurements. The data is collected over a southern
sub-tropical site, Reunion Island (20.8° S; 55.5° E), for the height
range between 30 and 60 km. The overall monthly mean temperature shows a
maximum of 265–270 K at the stratopause height region from ~44–52 km
and peaks during the months of March and November. Furthermore, the
temperature profiles are compared with different satellite datasets (HALOE,
CHAMP, COSMIC and SABER) and the results are found to be in reasonable
agreement with each other, although a relative difference in temperature of
± 5 to 6 K is noticed. In comparison, LIDAR shows higher/lower
temperatures for the lower mesosphere/upper stratosphere height region. The
differences in temperature measured by the LIDAR and satellite measurements
are analogous with previous results available elsewhere. Long-term
temperature measurements are used to further study seasonal oscillations,
especially annual, semi-annual and quasi-biennial oscillations. In
comparison with SAO, the measured spectral amplitudes of AO shows dominant
amplitudes in both the upper stratosphere and lower mesosphere height
regions. Using LIDAR and the other satellite measurements, the
quasi-biennial oscillation was found to be approximately 26 months. The
spectral amplitudes are comparable to the results reported earlier by other
researchers. |
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