Possible linkage between atmospheric total ozone and solar magnetic sector boundary passage

Superposed epoch analysis of the daily values of atmospheric total ozone at 70 stations for the period 1972–1975, with solar magnetic sector boundary passage (M.S.B.) past the earth as the key day, suggests large variations in high latitudes and larger variations in winter than in summer. Similar analysis with the day on which the boundary crossed the central meridian of the sun as key day does not reveal discernible ozone variations on the day of sector crossing. It is inferred that the link between solar activity and total ozone variation may be corpuscular radiation. A speculative hypothesis is proposed that the Mev solar Protons in the solar wind may be causing the variation in atmospheric ozone in association with the solar magnetic sector boundary passage.