Table 1.2.
Table 1.2. Trends in biologically active radiation (weighted with the erythemal action spectrum of McKinlay and Diffey, 1987), derived from total ozone and cloud reflectivity measurements from the Total Ozone Mapping Spectrometer (TOMS, version 7) over 1979-1992. Adapted from Herman et al. (1996).
Latitude band
degrees |
Trend(a)
% decade-1 |
Uncertainty(b)
± 2 sigma |
60°S – 70°S | 4.5 | 5.5 |
60°S – 50°S | 5.5 | 4.5 |
50°S – 40°S | 3.5 | 3.5 |
40°S – 30°S | 1.5 | 2.5 |
30°S – 20°S | 2.0 | 2.5 |
20°S – 10°S | 1.5 | 2.5 |
10°S – 0° | 1.5 | 3.0 |
0° – 10°N | 1.0 | 3.5 |
10°N – 20°N | 0.0 | 2.5 |
20°N – 30°N | 1.0 | 3.0 |
30°N – 40°N | 3.0 | 3.0 |
40°N – 50°N | 3.5 | 3.0 |
50°N – 60°N | 5.0 | 4.0 |
60°N – 70°N | 4.0 | 4.0 |