Influence of ozone mini-holes on UV radiation

The International Journal of Climatology has recently published two papers about the ozone mini-holes effects over the UV radiation. Sola and Lorente study the impact of two mini-holes on erythemal UV irradiance over Barcelona (Spain). They find that this irradiance at noon was 36% higher on 10 January 2004 than the day before. This date corresponds with the minimum total ozone value recorded over the Iberian Peninsula. On the other hand, Martinez-Lozano et al. analyzed the low ozone level episodes over Valencia (Spain) during 2000-2007. The increase of UV radiation related to the decrease in total ozone is quantified at 1.29 times this decrease