Latitude Dependence of the Total Ozone Trends for the Period 2005–2020: TOC for Bulgaria in the Period 1996–2020

The present study examines a long-term statistical trend analysis of Total Ozone Content (TOC) data from the AURA satellite for latitudes 60° and S. A methodology eliminating strong dependence on season has been applied by introducing relative deviation average monthly TOC climatological average. presents comparisons trends zonal values its values. In addition, standard error both parameters is calculated. course obtained mass (O3) period 2005–2020 presented, division made into three areas: (i) 30° S to N, (ii) S, (iii) N N. last part this demonstrates Bulgaria in 1996–2020. main results show that (a) considered latitude range, slow but steady increase O3 prevails, (b) low mid-latitudes, (c) general hemispheres determined positive southern hemisphere.