UV‐B irradiance at Madrid during 1996, 1997, and 1998

Abstract

Abstract. During 1996, 1997, and 1998, several total ozone depletion events were detected over Madrid (40øN, 3øW) in late spring and in winter. A broadband interferential filter instrument (UV-300) centered at 298 nm was used to monitor the solar UV-B irradiance on the ground, registering UV-B levels as high as 17.1 /xW/cm 2 (May 2, 1997, solar zenith angle SZA -35 ø, 03 = 268 Dobson units). The data obtained have been compared to that measured with two commercial biometers (PMA2102 and Solar Light 501A), showing that the evolution of UV-B due to total ozone changes are better followed with broadband instruments with effective windows centered at lower wavelength than with instruments responding to the erythemal action spectra. The development of simple, portable, and reliable instruments for the analysis of solar UV-B phenomena at the highenergy side of that band is advocated. IntroductionThe analysis of the historical total ozone content record has revealed an ozone depletion over large geographical areas taking place over at least the last decade

Ozone mini‐hole over southwestern Spain during January 2004: Influence over ultraviolet radiation

“…Some studies analyze the influence of OMs on UV radiation at different countries in Centre and North Europe, such as United Kingdom [ Austin et al , 1999], Norway [ Orsolini et al , 2003], Czech Republic [ Schmalwieser et al , 2004], and Germany [ Stick et al , 2006]. However, very few results about the UV radiation variability attributed to OMs episodes have been published to date in Spain [ Córdoba et al , 2000]. These studies are of high interest in this country, and particularly in the southwestern due to the high UV radiation recorded at these latitudes throughout the year [ Serrano et al , 2006].…”

Analysis of a low ozone episode over Extremadura (Spain) in January 2006 and its influence on UV radiation

“…Very few results about UV radiation analyses during ozone mini-hole episodes have been published to date in Spain (Córdoba et al, 2000;Antón et al, 2007). These studies have a great interest in this country, and particularly in the Extremadura region (South-Western Spain) due to the high UV radiation values measured at these latitudes throughout Correspondence to: M. Antón (mananton@unex.es) the year (Serrano et al, 2006).…”

Ozone mini‐holes over Valencia (Spain) and their influence on the UV erythemal radiation

“…Siani and Galliani (2002) analysed an ozone minihole which appeared at the end of November 2000 in Central Europe by means of a model that forecasts the ozone concentration tendency. Relevant studies in Spain are by Córdoba et al (2000), Pérez et al (2002), Gil et al (2004) and Serrano et al (2006). Córdoba et al (2000) and Pérez et al (2002) studied mini-hole episodes in Madrid over a 3-year period, showing that the increase in solar radiation is more pronounced in the UVB range (280-315 nm) than in the UVER.…”

“…Relevant studies in Spain are by Córdoba et al (2000), Pérez et al (2002), Gil et al (2004) and Serrano et al (2006). Córdoba et al (2000) and Pérez et al (2002) studied mini-hole episodes in Madrid over a 3-year period, showing that the increase in solar radiation is more pronounced in the UVB range (280-315 nm) than in the UVER. Gil et al (2004) showed that the historic minimum of the total ozone amount in the Iberian Peninsula occurred on 10 January, 2004.…”