Ozone and UV radiation over southern South America: climatology and anomalies

Photochemistry and Photobiology
Susana B DiazM Vernet

Abstract

Ozone and UV radiation were analyzed at eight stations from tropical to sub-Antarctic regions in South America. Ground UV irradiances were measured by multichannel radiometers as part of the Inter American Institute for Global Change Radiation network. The irradiance channels used for this study were centered at 305 nm (for UV-B measurements) and 340 nm (for UV-A measurements). Results were presented as daily maximum irradiances, as monthly averaged, daily integrated irradiances and as the ratio of 305 nm to 340 nm. These findings are the first to be based on a long time series of semispectral data from the southern region of South America. As expected, the UV-B channel and total column ozone varied with latitude. The pattern of the UV-A channel was more complex because of local atmospheric conditions. Total column ozone levels of < 220 Dobson Units were observed at all sites. Analysis of autocorrelations showed a larger persistence of total column ozone level than irradiance. A decreasing cross-correlation coefficient between 305 and 340 nm and an increasing cross-correlation coefficient between 305 nm and ozone were observed at higher latitudes, indicating that factors such as cloud cover tend to dominate at northern sites an...Continue Reading

References

Sep 16, 2005·Applied Optics·Susana DiazMaria Vernet

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Citations

Dec 17, 2009·Photochemistry and Photobiology·María Sol SouzaBeatriz Modenutti
May 26, 2009·Journal of Photochemistry and Photobiology. B, Biology·Betina Kappel PereiraJoão Antonio Pêgas Henriques
Aug 27, 2009·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Maria VernetHoracio E Zagarese
Oct 6, 2011·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Susana DiazJazmin Vrsalovic
Dec 1, 2017·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Marcelo HernandoLeda Giannuzzi
Apr 19, 2006·Photochemistry and Photobiology·Marjan van den BeltMaria Vernet
Jan 1, 2016·Tellus. Series B, Chemical and Physical Meteorology·L GallardoP Velásquez
Jul 8, 2020·Animals : an Open Access Journal From MDPI·Rui-Yi ChenChung-Der Hsiao
Jun 4, 2021·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Florencia de la RosaHernando Marcelo

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