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RESEARCH PRODUCT

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

J. L. Gómez-amoMaría P. UtrillasS. GandíaRoberto PedrósJosé A. Martínez-lozanoVictor Estellés

subject

PhysicsRadiometerbusiness.industryMechanical EngineeringMeasure (physics)IrradianceCollimatorBuilding and ConstructionRadiationmedicine.disease_causePollutionIndustrial and Manufacturing Engineeringlaw.inventionGeneral EnergyOpticslawShadowmedicineRadianceElectrical and Electronic EngineeringbusinessUltravioletCivil and Structural EngineeringRemote sensing

description

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.

yearjournalcountryeditionlanguage
2015-12-01Energy
https://doi.org/10.1016/j.energy.2015.10.021