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Conclusions

UV-B and ozone anticorrelations were studied using Cuiaba and Punta Arenas data for the entire year of 1995. It was shown that maximum UV-B radiation shows poor or no anticorrelation with total ozone. Only by using UV-B radiation at a given solar zenith angle is that the ozone and UV-B relation became more visible. Eliminating the cloud influence and using the irradiance ratio 305/325 helps to improve the correlation. It was observed,  for  irradiance ratio, the correlation coefficients r² increased from 0.20 and  0.10 (maximum UV-B, Punta Arenas and Cuiabá) to  0.79 and 0.61 (cloud effect removed, UV-B at  sza = 55^o,Punta Arenas, and at sza = 45^o, Cuiabá).