SURFACE OZONE CONCENTRATIONS OVER THE ATL ANTIC-OCEAN AND THE WEDDEL SEA

The results of measurements of ozone concentrations in the surface lay er of the atmosphere carried out on the board of die research vessel ' 'Akademik Fedorov'' in August-November, 1989 are presented. The peculi arities of the ozone distribution in the middle latitudes and tropical zone are analyzed. Change in ozone concentration while crossing the s ubtropic frontal zone and intertropic zone of convergence is noted. Th e anthropogenic influence on the ozone content is not registered over distant regions of Atlantic. Low values of the ozone concentration (10 - 15 ppb) were observed over the Weddel sea inside the circumpolar vo rtex. The day-to-day ozone variations in this region are caused by mig ration of the vortex boundary, passing of the synoptic eddies and the air advection from the middle latitudes' and the Antarctic Continent. Lowering of the ozone concentration in spring, routinely observed in t he north polar region and explained by the action of the bromin-organi c compounds, is not observed.