THE BIOLOGICALLY-ACTIVE ULTRAVIOLET-RADIATION IN RELATION TO THE SURFACE OZONE AND THE WIND-FIELD

Surface ozone mixing ratios based on the coloration of De James test p apers were monitored in Athens from 1931 to 1940. Taking into account the findings of recent laboratory experiments on the response of such test papers to variations in humidity and in duration of outdoor expos ure, a re-evaluated historic ozone series is presented. Furthermore, t he association of the wind field with the surface ozone variations is examined. Strong indications of protochemical ozone production at that time are detected and the possible relevant atmospheric processes are discussed. Furthermore the influence of the temporal surface ozone va riations on the solar ultraviolet radiation reaching the ground is inv estigated.