SURFACE SOLAR ULTRAVIOLET-RADIATION - A THEORETICAL APPROACH OF THE SUVR REACHING THE GROUND IN ATHENS, GREECE

Daily total ozone observations made during 1985-1993 by both the Total Ozone Mapping Spectrometer (TOMS) flown on the Satellite Nimbus-7 and the Dobson Spectrophotometer have been used in order to investigate t he fluctuations of the daily broad-band and spectral solar ultraviolet radiation reaching the ground. This investigation has been performed by employing a recently developed parametric algorithm for the estimat ion of the spectral and broad-band solar ultraviolet radiation which t akes the total ozone variations into consideration. Total ozone reduct ions during the summertime from 1985 to 1993 over Athens, Greece (37.6 degrees N, 23.4 degrees E), cause an increase in the ultraviolet irra diance which reaches the ground of 0.54 %, 0.98 %, 2.60 % and 0.79 % p er decade for the months of July at 300 nm, 312 nm, 320 nm and UVB (28 0-320 nm), respectively.