Antarctic tropopause in winter and spring

1Evtushevsky, OM, 1Grytsai, AV, 2Milinevsky, GP
1Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
2Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Kosm. nauka tehnol. 2008, 14 ;(4):58-71
Publication Language: Ukrainian
The distribution of total ozone, troposphere and stratosphere temperature as well as of tropopause height over Antarctic region is analyzed. Dominant influence of lower stratosphere cooling on the tropopause height increase is revealed. The cooling is caused by the temperature decrease within the stratospheric polar vortex in the winter months and by the ozone losses and ozone hole formation in the spring months. In the Weddell Sea region an anomalous tropopause elevation to 13‒14 km (as compared with typical values of 9‒10 km) is accompanied by widening the transition layer between the troposphere and stratosphere. Troposphere influence is seen only in the tropopause lowering by 2 km over the continental plateau in the East Antarctica. The seasonal formation and regional location of the anomaly cause the changes in the troposphere vertical extension over Antarctic region, in the processes of the troposphere-stratosphere exchange and in the planetary wave propagation involved in the climate change in the region.
Keywords: Antarctic region, ozone, temperature
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