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° N the winter trend shows an annual ozone depletion rate of just over —0-8 per cent per year. This paper reports trends derived from the TOMS reprocessed total ozone data for the case of Athens (38° N 24° E) from January 1979 to January 1992. The total depletion over the 13 year period shows a strong seasonal variation 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 models.