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Ann. Geophys., 22, 1487-1493, 2004
www.ann-geophys.net/22/1487/2004/
© European Geosciences Union 2004
Multi-resolution analysis of global total ozone column during 1979−1992 Nimbus-7 TOMS period
E. Echer
Instituto Nacional de Pesquisas Espaciais – INPE, POB: 515, 12201-970, São José dos Campos, Brazil
Abstract. A relatively recent technique, the multi-resolution analysis (MRA), was
applied to the global total ozone column measured by the Nimbus-7 TOMS
instrument during 1979–1992. Ozone monthly averages were filtered in
orthonormal frequency bands using the Meyer wavelet transform, and the ozone
variability was analyzed in different time scales: high frequency
oscillations (2–4 months), semiannual variation (6 months), annual
variation, quasi-biennial oscillation (QBO), El Niño-Southern
Oscillation (ENSO) and solar cycle related variations. MRA was thus showed
to be an efficient band-pass filter to isolate different time scale signals.
QBO, ENSO and solar cycle related variations in global total ozone are
investigated in more detail through spectral and cross-correlation analyses.
Key words. Atmospheric composition and structure (middle
atmosphere-composition and chemistry) – General or miscellaneous
(techniques applicable in three or more fields)
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