Interannual variability of planetary waves in the ozone layer at 65°S
Abstract:Planetary wave activity in the ozone layer was analysed using the Total Ozone Mapping Spectrometer (TOMS) satellite total ozone measurements. The area under study is southern latitude 65°S, the closest to the location of the Vernadsky station (65°15′S, 64°16′W). The time–longitude variations in the total ozone during August–December 1979–2003 are presented. The five‐month average distributions of the total ozone along the latitude circle of 65°S show the steady features of quasi‐stationary zonal distribution caused by superposition of the total wave numbers. The structure of wave number 1 is dominant. Interannual variations and long‐term trends of the total wave number amplitude and longitudinal position of the wave ridge (high ozone) and trough (low ozone) are described. Due to the wave amplitude increase the difference between low and high ozone in the opposite longitudinal sectors reached ca 30% in the early 2000s. During 1979–2003 the wave ridge position was relatively stable with the mean longitude of 152±15°E; however, the wave trough position drifted eastward from 55°W to the Greenwich meridian with the mean velocity of the long‐term drift of 23.6±7.2° per decade. Deviation of the quasi‐stationary wave characteristics relative to the mean tendency took place in 1988 and 2002.
Document Type: Research Article
Affiliations: 1: National Tarasa Shevchenka University of Kyiv, Astronomy and Space Physics Department, 2 Akad. Glushkova av., Building 1, Kyiv, 03127, Ukraine 2: Ukrainian Antarctic Center, 16 Tarasa Shevchenka blvd., Kyiv, 01601, Ukraine
Publication date: August 20, 2005