Sl. No | Year of SSW | Central date of warming | Duration of SSW (days) | T min anomaly | T max anomaly (K) | Ozone before SSW (DU) | Ozone during SSW (DU) | Range of O3 in SSW |
1 | 1998-99 | 14 Dec-98 | 10 | −12 K | 15 K | −15 DU | 10 DU | 25 DU |
2 | 1987-88 | 7 Dec-87 | 13 | −18 K | 15 K | −20 DU | 10 DU | 30 DU |
3 | 1984-85 | 29 Dec-84 | 13 | −12 K | 12 K | 0 DU | 10 DU | 10 DU |
4 | 1981-82 | 2 Dec-81 | 9 | −3 K | 3 K | −10 DU | 10 DU | 30 DU |
5 | 1980-81 (final SSW) | 28 Feb-80 | 5 | −9 K | 12 K | − 40 DU | 40 DU | 80 DU |