global UV index

quantity developed for the public domain, for weather forecasting and climatology, which quantifies the erythemal potential (or sunburning power) of the ambient solar ultraviolet radiation (or sunlight), but could also be applied to other sources

Unit: 1

NOTE The International Global UV Index, IUV, is defined by the formula:


where Eλ is the solar spectral irradiance expressed in W⋅m-2⋅nm-1 at wavelength λ, ser(λ) is the erythema action spectrum developed by CIE and ker is a constant equal to 40 m2⋅W-1.

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