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Measurements of integrated direct, diffuse and global ultraviolet-B radiation

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  • Utrillas, M.P.
  • Pedrós, R.
  • Gandía, S.
  • Gómez-Amo, J.L.
  • Estellés, V.
  • Martínez-Lozano, J.A.

Abstract

We present the first multiyear set of simultaneous measurements of the global ultraviolet-B radiation and its two components: direct and diffuse. The measurements have been taken with four YES-UVB-1 radiometers: two radiometers to measure the diffuse radiation, one provided with a shadow band and the other with a shadow disk on a Sun tracker; a radiometer to measure the global horizontal radiation; and a Sun-tracking radiometer to measure the direct radiation with an especially designed radiance collimator. The diffuse minute-values measured with both instruments agree within a coefficient correlation of 1.00. The diffuse component represents at least 50% of the global UVB (ultraviolet-B) radiation. The minute values of global UVB irradiance obtained by adding the direct and diffuse components concur with the measured global irradiance. Therefore, the measurement of the direct irradiance enables the estimation of the diffuse component, and gives an insight into the factors that affect its value, especially aerosols.

Suggested Citation

  • Utrillas, M.P. & Pedrós, R. & Gandía, S. & Gómez-Amo, J.L. & Estellés, V. & Martínez-Lozano, J.A., 2015. "Measurements of integrated direct, diffuse and global ultraviolet-B radiation," Energy, Elsevier, vol. 93(P2), pages 1658-1662.
    • Handle: RePEc:eee:energy:v:93:y:2015:i:p2:p:1658-1662
    DOI: 10.1016/j.energy.2015.10.021
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    References listed on IDEAS

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    1. Kudish, Avraham I. & Evseev, Efim G., 2012. "UVB irradiance and atmospheric optical depth at the Dead Sea basin, Israel: Measurements and modeling," Renewable Energy, Elsevier, vol. 48(C), pages 344-349.
    2. Jacovides, C.P. & Boland, J. & Rizou, D. & Kaltsounides, N.A. & Theoharatos, G.A., 2012. "School Students participation in monitoring solar radiation components: Preliminary results for UVB and UVA solar radiant fluxes," Renewable Energy, Elsevier, vol. 39(1), pages 367-374.
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    1. Gómez-Amo, J.L. & Freile-Aranda, M.D. & Camarasa, J. & Estellés, V. & Utrillas, M.P. & Martínez-Lozano, J.A., 2019. "Empirical estimates of the radiative impact of an unusually extreme dust and wildfire episode on the performance of a photovoltaic plant in Western Mediterranean," Applied Energy, Elsevier, vol. 235(C), pages 1226-1234.

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