OZONE DEPLETION OVER GREECE AS DEDUCED FROM NIMBUS-7 TOMS MEASUREMENTS

The Total Ozone Mapping Spectrometer (TOMS) on the Nimbus-7 satellite has been measuring the total column amount of ozone over the globe for more than 13 years. Recent findings from TOMS data suggest that just north of 40-degrees N the winter trend shows an annual ozone depletion rate of just over -0.8 per cent per year. This paper reports trends d erived from the TOMS reprocessed total ozone data for the case of Athe ns (38-degrees N 24-degrees E) from January 1979 to January 1992. The total depletion over the 13 year period shows a strong seasonal variat ion from more than 7 per cent in winter and early spring to about 2.5 per cent in summer. These trends are twice as large as expected from m odels.