The connection between solar activity and long-term trends of total ozone in the Northern hemisphere

Beginning from 1961, data from a number of Soviet and Dobson ground-based spectrophotometric stations located in the latitude range from 43°N to 60°N (more or less equally spaced in longitude, at 43°N, 53°N and 60°N) are analysed. It is shown that there is a certain correlation between the total ozone amount and the 11-year solar cycle for some stations. In addition, when averaging annual deviations of the total. ozone content from the long-term mean values for each station and then for all the stations, the final curve of the ozone trend shows agreement with the long-term variation of the solar constant (over the period from 1961–1992) which may be part of the 80–90 year Gleissberg cycle. We therefore suppose that the main reason for the ozone trend found is the variation in solar activity.