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Variability of UV irradiance in Europe

Seckmeyer, Gunther and Pisulla, Darius and Glandorf, Merle and Henriques, Diamantino and Johnsen, Bjorn and Webb, Ann and Siani, Anna-Maria and Bais, Alkis and Kjeldstad, Berit and Brogniez, Colette and Lenoble, Jacqueline and Gardiner, Brian and Kirsch, Peter and Koskela, Tapani and Kaurola, Jussi and Uhlmann, Beate and Slaper, Harry and den Outer, Peter and Janouch, Michael and Werle, Peter and Gröbner, Julian and Mayer, Bernhard and de la Casiniere, Alain and Simic, Stana and Carvalho, Fernanda (2008) Variability of UV irradiance in Europe. Photochemistry and Photobiology, 84, pp. 172-179.

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Official URL: http://www3.interscience.wiley.com/journal/118493575/home


The diurnal and annual variability of solar UV radiation in Europe is described for different latitudes, seasons and different biologic weighting functions. For the description of this variability under cloudless skies the widely used onedimensional version of the radiative transfer model UVSPEC is used. We reconfirm that the major factor influencing the diurnal and annual variability of UV irradiance is solar elevation. While ozone is a strong absorber of UV radiation its effect is relatively constant when compared with the temporal variability of clouds. We show the significant role that clouds play in modifying the UV climate by analyzing erythemal irradiance measurements from 28 stations in Europe in summer. On average, the daily erythemal dose under cloudless skies varies between 2.2 kJ m<sup>-2</sup> at 70N and 5.2 kJ m<sup>-2</sup> at 35N, whereas these values are reduced to 1.5–4.5 kJ m<sup>-2</sup> if clouds are included. Thus clouds significantly reduce the monthly UV irradiation, with the smallest reductions, on average, at lower latitudes, which corresponds to the fact that it is often cloudless in the Mediterranean area in summer.

Document Type:Article
Title:Variability of UV irradiance in Europe
AuthorsInstitution or Email of Authors
Seckmeyer, GuntherLeibniz-Univ. Hannover
Pisulla, DariusLeibniz-Univ. Hannover
Glandorf, MerleLeibniz-Univ. Hannover
Henriques, DiamantinoInstituto de Meteorologia, Lisbon, P
Johnsen, BjornNRPA, N
Webb, AnnUniv. of Manchester, UK
Siani, Anna-MariaUniv. di Roma La Sapienza, I
Bais, AlkisAristotle Univ. of Thessaloniki, GR
Kjeldstad, BeritNorwegian Univ. of Science and Technology
Brogniez, ColetteUniv. des Science et Technologies de Lille, F
Lenoble, JacquelineUniv. Joseph Fourier, Grenoble, F
Gardiner, BrianBritish Antarctic Survey, Cambridge, UK
Kirsch, PeterBritish Antarctic Survey, Cambridge, UK
Koskela, TapaniFinnish Meteorological Inst., Helsinki, F
Kaurola, JussiFinnish Meteorological Inst., Helsinki, F
Uhlmann, BeateBeiersdorf, Hamburg
Slaper, HarryRIVM, NL
den Outer, PeterRIVM, NL
Janouch, MichaelCzech Hydrometeorological Institute, CS
Werle, PeterIMK-IFU, Garmisch-Partenkirchen
Gröbner, JulianPhysikalisch-Meteorologisches Observatorium Davos, CH
Mayer, BernhardUNSPECIFIED
de la Casiniere, AlainUniv. Joseph Fourier, Grenoble, F
Simic, StanaUniv. Wien, A
Carvalho, FernandaInst. de Meteorologia, Lisbon, P
Journal or Publication Title:Photochemistry and Photobiology
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 172-179
Keywords:ultraviolet radiation
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Remote Sensing
Deposited By: Dr.rer.nat. Bernhard Mayer
Deposited On:08 Sep 2008
Last Modified:20 Oct 2014 14:32

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