Variability of UV Irradiance in Europe

Seckmeyer, Günther; Pissulla, Darius; Glandorf, Merle; Henriques, Diamantino; Johnsen, Bjørn; Webb, Ann R.; Siani, Anna Maria; Bais, A. F.; Kjeldstad, Berit; Brogniez, Colette; Lenoble, J.; Gardiner, B. G.; Kirsch, Peter; Koskela, Tapani; Kaurola, Jussi; Uhlmann, Beate; Slaper, H.; Outer, Peter den; Janouch, Michal; Werle, Peter; Gröbner, Julian; Mayer, Bernhard; Casinière, A. de La; Simic, S.; Carvalho, Fernanda

doi:10.1111/j.1751-1097.2007.00216.x

Cited by 101 publications

(71 citation statements)

References 35 publications

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“…reported by Seckmeyer et al (2008a) and Bais et al (2015) because wavelengths in the UV-B range contribute about 90% to the erythemal dose. Differences between corresponding latitudes in the Northern and Southern Hemispheres can be attributed to differences in cloudiness, total ozone, aerosol loading, Sun-Earth separation, altitude, and albedo [Seckmeyer et al, 2008b;Bais et al, 10 24 Atmos.…”

Section: Bounding Causative Factors In Latitudinal Uv Variationmentioning

confidence: 99%

The Network for the Detection of Atmospheric Composition Change (NDACC): History, status and perspectives

Mazière¹,

Thompson²,

Kurylo³

et al. 2017

Preprint

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Abstract. The Network for the Detection of Atmospheric Composition Change (NDACC) is an international global network of more than 80 stations making high quality measurements of atmospheric composition that began official operations in 1991 after five years of planning. Originally named the Network for the Detection of Stratospheric Change (NDSC), the goal of NDACC is to observe changes in the chemical and physical state of the stratosphere and upper troposphere and to 25 assess the impact of such changes on the lower troposphere and climate. NDACC's origins, station locations, organizational structure and data archiving are described. NDACC is structured around categories of ground-based observational techniques, timely cross-cutting themes (ozone, water vapour, measurement strategies and emphases), satellite measurement systems, and theory and analyses. To widen its scope, NDACC has established formal collaborative agreements with eight other Cooperating Networks. A brief history is provided, major accomplishments of NDACC during its first 25 years of 30 operation are reviewed, and a forward-looking perspective is presented.1 Atmos. Chem. Phys. Discuss., https://doi

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Section: Bounding Causative Factors In Latitudinal Uv Variationmentioning

confidence: 99%

The Network for the Detection of Atmospheric Composition Change (NDACC): History, status and perspectives

Mazière¹,

Thompson²,

Kurylo³

et al. 2017

Preprint

Self Cite

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“…2f, are clearly following the changes in SZA with maxima in summer (June, July) and minima in winter (December). The shift of the annual maxima from June to July can be attributed to the annual variations of TOC (Seckmeyer et al, 2008).…”

Section: Annual Variations and Trendsmentioning

confidence: 99%

Reconstruction and analysis of erythemal UV radiation time series from Hradec Králové (Czech Republic) over the past 50 years

et al. 2018

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Abstract. This paper evaluates the variability of erythemal ultraviolet (EUV) radiation from Hradec Králové (Czech Republic) in the period 1964-2013. The EUV radiation time series was reconstructed using a radiative transfer model and additional empirical relationships, with the final root mean square error of 9.9 %. The reconstructed time series documented the increase in EUV radiation doses in the 1980s and the 1990s (up to 15 % per decade), which was linked to the steep decline in total ozone (10 % per decade). The changes in cloud cover were the major factor affecting the EUV radiation doses especially in the 1960s, 1970s, and at the beginning of the new millennium. The mean annual EUV radiation doses in the decade 2004-2013 declined by 5 %. The factors affecting the EUV radiation doses differed also according to the chosen integration period (daily, monthly, and annually): solar zenith angle was the most important for daily doses, cloud cover, and surface UV albedo for their monthly means, and the annual means of EUV radiation doses were most influenced by total ozone column. The number of days with very high EUV radiation doses increased by 22 % per decade, the increase was statistically significant in all seasons except autumn. The occurrence of the days with very high EUV doses was influenced mostly by low total ozone column (82 % of days), clear-sky or partly cloudy conditions (74 % of days) and by increased surface albedo (19 % of days). The principal component analysis documented that the occurrence of days with very high EUV radiation doses was much affected by the positive phase of North Atlantic Oscillation with an Azores High promontory reaching over central Europe. In the stratosphere, a strong Arctic circumpolar vortex and the meridional inflow of ozone-poor air from the southwest were favorable for the occurrence of days with very high EUV radiation doses. This is the first analysis of the relationship between the high EUV radiation doses and macroscale circulation patterns, and therefore more attention should be given also to other dynamical variables that may affect the solar UV radiation on the Earth surface.

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“…Furthermore, sun exposure among natives and tourists is very common in both work and leisure activities (Siani et al, 2008(Siani et al, , 2009. Some Italian institutions have been involved in European projects (Seckmeyer et al, 2008b), COST Actions (Hülsen and Gröbner, 2007) and international campaigns (Gröbner et al, 2010) and several Regional Environmental Protection Agencies (ARPAs, see Table 1 for a list of the agencies acronyms) started a monitoring programme in the last few years. However, the existing Italian instrumentation is not being operated within an established national network and a common research programme has not yet been planned.…”

Section: Introductionmentioning

confidence: 99%

First national intercomparison of solar ultraviolet radiometers in Italy

et al. 2011

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It involved 8 institutions, 10 broadband radiometers, 2 filter radiometers and 2 spectroradiometers. Synchronized measurements of downward global solar UV irradiance at the ground were collected and the raw series were then individually processed by the respective operators on the base of their own procedures and calibration data. A radiative transfer model was successfully applied as an interpretative tool. The input parameters and output results are described in detail. The comparison was performed in terms of global solar UV Index and integrated UV-A irradiance against a wellcalibrated double monochromator spectroradiometer as reference. An improved algorithm for comparing broadband data and spectra has been developed and is discussed in detail. For some instruments, we found average deviations ranging from −16 % up to 20 % relative to the reference and diurnal variations as large as 15 % even in clear days. Remarkable deviations were found for the instruments calibrated in the manufacturers' facilities and never involved in field intercomparison. Finally, some recommendations to the UV operators based on the campaign results are proposed.

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Variability of UV Irradiance in Europe

Cited by 101 publications

References 35 publications

The Network for the Detection of Atmospheric Composition Change (NDACC): History, status and perspectives

The Network for the Detection of Atmospheric Composition Change (NDACC): History, status and perspectives

Reconstruction and analysis of erythemal UV radiation time series from Hradec Králové (Czech Republic) over the past 50 years

First national intercomparison of solar ultraviolet radiometers in Italy

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