Total ozone and solar ultraviolet radiation, as derived from satellite andground-based instrumentation at Dundee, Scotland

Daily ozone measurements from satellite sensor data (Total Ozone Mapping Sp ectrometer-TOMS) over Dundee, Scotland (56.5 degrees N, 3 degrees W) during 1986-1992 with daily broad-band measurements of solar ultraviolet (UV) rad iation reaching the ground deduced from ground-based instrumentation were u sed to investigate their correlation. The erythemally active UV radiation s howed an increase of 35% during 1986-1992 while the total ozone amount show ed a decrease of 10% during the same period. Furthermore, the ratio of the increase of UV radiation to the decrease in atone concentration was maximum in July, showing that a small percentage decrease in total ozone during su mmer leads to a large percentage increase in solar UV radiation reaching th e ground.