Stratospheric ozone climatology and its variability over Ankara

The climatological characteristics of ozone based on Total Ozone Mapping Spectrometer (TOMS) and Ozone Monitoring Instrument (OMI) data, during 1979–2008 over central Anatolia, Ankara (32°E, 39°N) is analyzed. The location is highly effected by a number of atmospheric perturbing events such as strong jet winds. Main characteristics of the annual and interannual variability of total ozone over Turkey are presented. The maximum decreasing winter-spring decadal trend was found to be 0.16%. Furthermore seasonal variation of ozone is examined by calculating the deviations from the mean. The variations in low ozone days are 23.7%, 26.6% and 30% for spring, winter and summer, respectively.