Multi-resolution analysis of global total ozone column during 1979−1992 Nimbus-7 TOMS period

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)