Longitudinal position of the quasi-stationary wave extremes over the Antarctic region from the TOMS total ozone

Zonal asymmetry of total ozone content (TOC) in the Antarctic region is analysed using the TOMS measurements in 1979-2004. The TOC longitudinal distribution at the individual latitude circles in the latitude band 55-75 degrees S with the 5 degrees step is considered. From the positions of the zonal wave extremes it is revealed that the TOC zonal minimum is displaced eastward in the longitudinal sector 60 degrees W-0 degrees E with total shift of about 50 degrees. The zonal maximum position is rather stable in the quadrant 90 degrees E-180 degrees E. Evidence is obtained that averaged geographical location of the extremes at the five latitude circles reproduces the Antarctic continent boundary in the corresponding longitudinal sectors.