TOTAL OZONE OVER THE RUSSIAN FEDERATION AND ADJACENT COUNTRIES FROM 30-YEAR GROUND-BASED MEASUREMENTS

A. M. Shalamyanskii, I. L. Karol, L. P. Klyagina, and K. I. Romashkina

Total ozone (TO) measurements at the Russian Federation network for 1973—2002 checked and averaged over months and over five basic regions from the north of European Russia to the Far East are presented. Seasonal ozone changes by regions for the entire period and two half-periods (1973—1987 and 1988—2002) are analyzed. Statistical parameters of databases and statistical significance of differences in monthly mean TO between these half-periods and regions are estimated. It is shown that these differences are significant at the 95—99% level in winter and spring months and insignificant in summer at the level below 90%. These long-term data can be used as climatic normals for assessing past, present, and future changes in the ozonosphere.