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| Titel |
Zonal wave numbers 1-5 in planetary waves from the TOMS total ozone at 65° S |
| VerfasserIn |
A. Grytsai, Z. Grytsai, A. Evtushevsky, G. Milinevsky, N. Leonov |
| 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. 5 ; Nr. 23, no. 5 (2005-07-27), S.1565-1573 |
| Datensatznummer |
250015246
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| Publikation (Nr.) |
 copernicus.org/angeo-23-1565-2005.pdf |
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| Zusammenfassung |
| Planetary waves in the total ozone at the southern latitude of 65° S are
studied to obtain the main characteristics of the zonal wave numbers 1–5. The
TOMS total ozone data were used to analyze the amplitude and periodicity
variations of the five spectral components during August-December of
1979–2003. A presence of the shorter period of waves 1–3 in 1996 (7 days) in
comparison with 2002 (8–12 days) is revealed which can be attributed to the
distinction in conditions of typical and anomalously weak stratospheric
polar vortex, probably, a strong and weak mean zonal wind. The interannual
variations of the monthly and 5-month mean amplitudes of the zonal wave
numbers 1–5 are described. Wave 1 has the largest amplitude in October
(up to 139 DU in 2000) and increasing amplitude trend (15 DU/decade for
October 1979–2003). The 5-month mean amplitudes averaged over 1979–2003 are
53.6, 29.9, 15.5, 10.5, and 7.8 DU for the wave number sequence 1, 2, 3, 4
and 5, respectively. For the stationary components the amplitudes are 38.3,
4.8, 1.8, 1.2, 0.7 DU, respectively. Thus, the stationary component of wave 1
and the traveling one of waves 2–5 are predominant. The tendencies in a
long-term change in the wave number amplitude can be explained by taking into
account the degree of wave deformation of the stratospheric polar vortex
edge, net meridional displacements of the lower stratosphere air, and the
difference between the total ozone loss and negative trends in the polar and
mid-latitude regions.
Keywords. General circulation – Middle atmosphere dynamics
– Waves and tides |
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