Dependence of TOC variations on helio-geomagnetic activity in the mid-latitude atmosphere

The connection of total ozone content (TOC) with helio-geomagnetic activity in the mid-latitude atmosphere (similar to52degreesN) was considered. The study used measurements from the Nimbus-7 satellite (TOMS) covering the time interval 19781992 for three regions: Irkutsk (Russia), Collm (Germany), and Saskatoon (Canada). An analysis was made of the dependence of TOC variations on the solar radio flux intensity F-10.7 and the planetary index of geomagnetic activity A(p) for different phases of solar cycle and for different seasons. Some numerical estimates of the connection of TOC with the indices F-10.7 and A(p) were obtained. Non-zonality effects in the character of the dependence of total ozone content on helio-geomagnetic activity were identified, which seem to be associated with climatological differences of the regions under consideration.