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| Titel |
First meteor radar observations of tidal oscillations over Jicamarca (11.95° S, 76.87° W) |
| VerfasserIn |
L. Guo, G. Lehmacher |
| 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. 6 ; Nr. 27, no. 6 (2009-06-26), S.2575-2583 |
| Datensatznummer |
250016570
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| Publikation (Nr.) |
 copernicus.org/angeo-27-2575-2009.pdf |
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| Zusammenfassung |
Tidal oscillations in the equatorial mesosphere and lower thermosphere (MLT)
region over Jicamarca (11.95° S, 76.87° W) are studied using the
observations from the newly installed Jicamarca All-sky Specular MEteor
Radar (JASMET). The vertical structure and seasonal variability of diurnal
and semidiurnal tides from 80–100 km are presented.
The analyses show a strong diurnal tide over Jicamarca for both zonal and
meridional components with the meridional amplitudes being larger than the
zonal ones. Maximal diurnal amplitudes, 45 m/s for zonal and 55 m/s for
meridional, are observed around equinox. The zonal diurnal amplitudes reach
maxima at 90–96 km, while the meridional diurnal amplitudes grow with
altitude for most months. Semidiurnal amplitudes vary not as strong as
diurnal amplitudes.
The vertical structures of the tidal components are compared with Global
Scale Wave Model (GSWM02) prediction and the tidal wind analysis results
from TIDI measurements onboard of the TIMED satellite. The data from JASMET
and TIDI show similar amplitudes for both diurnal and semidiurnal tides.
GSWM02 overestimates diurnal amplitudes, but underestimates semidiurnal
amplitudes for both zonal and meridional components. |
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