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Abstract
Satellite ozone data over the Antarctic region have been analysed for 1979–2008. Quasi-stationary wave (QSW) characteristics are obtained for the September–November period for the latitudinal range 50–80° S. Two time intervals for the wave amplitude changes are discussed: 1979–early 1990s, when the amplitude was increasing, and mid-1990s–2000s, when long-term amplitude changes did not have sufficient statistical reliability. A systematic change of the minimum position in quasi-stationary ozone distribution is studied. It is shown that an eastward minimum shift lasted during 1979–2008. Characteristics of the Fourier harmonics in ozone distribution are considered. Tendencies in the amplitudes and phases of the main wave components with zonal numbers 1 and 2 are determined. Amplitude dependence on zonal number is studied for the 1979–2008 averaged data. It is shown that this dependence obeys the power law with factors 0.7–1.6 for daily amplitudes and 1.9–2.6 for QSW in zonal ozone distribution.
Acknowledgements
TOMS and OMI daily total ozone data were provided by the Ozone Processing Team, NASA Goddard Space Flight Center, USA, from their website (http://toms.gsfc.nasa.gov). KNMI reanalysis data from http://www.temis.nl were used. This work was partly supported by Taras Shevchenko National University of Kyiv, project 06BF051-12. The author thanks the researchers of Astronomy and Space Physics Department, O. Evtushevsky, G. Milinevsky and O. Agapitov, for important discussions about the paper, and Z. Grytsai for assistance on ozone data systematization. Thanks also go to two anonymous referees for useful comments and corrections.
