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Conclusions

The Marambio station is located in the Antarctic continent and the analysis of its position with respect to the polar vortex is necessary to correlate the Antarctic ozone depletion and the ozone behavior over this region. The new 2D coordinate system, equivalent latitude of the station at various isentropic levels, is used to classify the data with respect to the polar vortex. At 475 K in autumn, the station is outside the vortex in 40% of the cases and in the vortex edge in 30% of the cases. In the winter-spring seasons it is mostly inside the vortex. Ozone values less than 150 DU are detected in the beginning October. The study of the ozone evolution at different isentropic levels (fig. 6) shows the different ozone destruction rates in the low and middle stratosphere, especially in 1998. The comparison of the ozone evolution over Ushuaia and Marambio emphasize the different ozone behavior in the mid-latitude and polar regions.


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