Effect of Antarctic ozone holes of 1988, 1989, and 1990 on lower latitudes of the southern hemisphere

Abstract. The October depletions in the Antarctic ozone spread to lower latitudes in early November in 1988, in late November in 1989, and in late October in 1990. The depletions were 10–15% for latitudes up to 40°S and smaller thereafter, and almost negligible at 25°S and beyond. However, for the southern hemisphere, the normal seasonal changes at middle latitudes from October to December are much larger (about 20%). Also, there are superposed fluctuations of about 20% over a few (5–6) days.