Planetary wave peculiarities in Antarctic ozone distribution during 1979–2008
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.
Document Type: Research Article
Affiliations: Astronomy and Space Physics Department,Taras Shevchenko National University of Kyiv, 03680Ukraine
Publication date: 2011-06-10