Effects of desert dust and ozone on the ultraviolet irradiance at the Mediterranean island of Lampedusa during PAUR II, Di Sarra, Alcide, Cacciani M., Chamard P., Cornwall C., DeLuisi J.J., Di Iorio Tatiana, Disterhoft P., Fiocco G., Fuà D., and Monteleone Francesco , Journal of Geophysical Research Atmospheres, Volume 107, Number 18, p.2-1-2-14, (2002)