SOME RECENT RESULTS OF RUSSIAN MEASUREMENTS OF SURFACE OZONE IN ANTARCTICA - A METEOROLOGICAL INTERPRETATION

Surface ozone measurements were carried out at Molodezhnaya (67.40-deg rees-S, 45.50-degrees-E) and Mirny (66.33-degrees-S, 93.01-degrees-E) stations in spring 1987-autumn 1988 with a Dasibi 1008-AH ozone analyz er. The data show an annual variation with a summer minimum at 15 ppbv value. The striking feature of the surface ozone record is two types of day-to-day variability. One of the types is characterized by large day-to-day variations with about 10 ppbv magnitude. The likely mechani sm of such variations is the vertical transport induced by cyclonic ac tivity. The other type occurs in synoptically quiet periods (frequent in summer) when the day-to-day ozone variations are significant but no t so large. The most likely mechanism of these variations is the slope katabatic wind which transports ozone from inside the Antarctic conti nent. The latitudinal distribution of surface ozone for this period, m easured aboard an aircraft, showed a slight increase towards Vostok (7 8.28-degrees-S, 106.48-degrees-E) station.