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| Titel |
Intra-seasonal Oscillations (ISO) of zonal-mean meridional winds and temperatures as measured by UARS |
| VerfasserIn |
F. T. Huang, H. G. Mayr, C. A. Reber |
| 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. 4 ; Nr. 23, no. 4 (2005-06-03), S.1131-1137 |
| Datensatznummer |
250015208
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| Publikation (Nr.) |
 copernicus.org/angeo-23-1131-2005.pdf |
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| Zusammenfassung |
| Based on an empirical analysis of measurements with the
High Resolution Doppler Imager (HRDI) on the UARS spacecraft in the upper
mesosphere (95km), persistent and regular intra-seasonal oscillations (ISO)
with periods of about 2 to 4 months have recently been reported in the
zonal-mean meridional winds. Similar oscillations have also been discussed
independently in a modeling study, and they were attributed to
wave-mean-flow interactions. The observed and modeled meridional wind ISOs
were largely confined to low latitudes. We report here on an analysis of
concurrent UARS temperature measurements, which produces oscillations
similar to those seen in the meridional winds. Although the temperature
oscillations are observed at lower altitudes (55km), their phase variations
with latitude are qualitatively consistent with the inferred properties seen
in the meridional winds and thus provide independent evidence for the
existence of ISOs in the mesosphere. |
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