Table 28.1 - Total ozone trends in per cent per decade (with 95% confidence limits) from satellite (TOMS) and ground-based observations
Source: WMO, 1991
  | TOMS (197991) | Ground-based 26° N64° N | |||
---|---|---|---|---|---|
Season | 45°S | Equator | 45°N | 197991 | 197091 |
DecemberMarch | 5.2 ± 4.5 | +0.3 ± 4.5 | 5.6 ± 3.5 | 4.7 ± 0.9 | 2.7 ± 0.7 |
MayAugust | 6.2 ± 3.0 | +0.1 ± 5.2 | 2.9 ± 2.1 | 3.3 ± 1.2 | 1.3 ± 0.4 |
SeptemberNovember | 4.4 ± 3.2 | 0.3 ± 5.0 | 1.7 ± 1.9 | 1.2 ± 1.6 | 1.2 ± 0.6 |