Uv And Ozone Anticorrelations At The Brazilian Antarctic Station Comandante Ferraz

Solar UV observations are made by INPE at the<br>Brazilian Antarctic Station Comandante Ferraz (62o<br>S, 58o W) since 1996. In this paper a study on UVozone<br>anticorrelations is made for the year 1998,<br>using narrowband UV channels (305, 320 nm) and<br>the UV irradiance ratio (305/320). A large,<br>exponential relationship between ozone and UV<br>radiation is seen during the whole year. The<br>correlation is stronger in the spring compared to<br>autumn, when the ozone hole develops and there are<br>huge ozone variations. It is observed that the<br>utilization of the irradiance ratio improves the<br>correlation between ozone and UV, because of the<br>elimination of factors nearly independent of<br>wavelength, responsible in part for the UV variability.