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| Titel |
Features of the seasonal variation of the semidiurnal, terdiurnal and 6-h components of ozone heating evaluated from Aura/MLS observations |
| VerfasserIn |
J. Xu, A. K. Smith, G. Jiang, W. Yuan, H. Gao |
| 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 ; 30, no. 2 ; Nr. 30, no. 2 (2012-02-01), S.259-281 |
| Datensatznummer |
250017178
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| Publikation (Nr.) |
 copernicus.org/angeo-30-259-2012.pdf |
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| Zusammenfassung |
| This paper presents the thermal forcing of the semidiurnal, terdiurnal, and
6-h components of the migrating tide induced by ozone heating in
stratosphere and lower mesosphere. The heating as a function of local time
is determined from the global ozone observed by the Microwave Limb Sounder
on the Aura satellite. The harmonic components of the heating rates of the
semidiurnal, terdiurnal and the 6-h periodicities are calculated using
the Strobel/Zhu parameterized model and then decomposed into Hough modes.
Seasonal variations of each harmonic component and its Hough modes are
presented. For all three tidal components, the majority of the annual mean
O3 heating projects onto symmetric modes. The semiannual variation is a
prominent signal in almost all of the symmetric Hough modes near the
stratopause. The strongest annual variation takes place in the asymmetric
modes. The results also show that, during the solstice season, the maximum
forcing of the diurnal and terdiurnal component occurs in the summer
hemisphere while the maximum forcing of the semidiurnal and 6-h components
occurs in the winter hemisphere. The global mean ozone density and the tidal
components of the ozone heating rate are different between December–January
and June–July. The asymmetry in the heating is primarily due to the 6.6%
annual variation in the solar energy input into the Earth's atmosphere due
to the annual variation of the Sun-Earth distance. |
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