...lees ik op Wikipedia. Dat betekent dat er inderdaad internationale afspraken bestaan over de berekening van de UV Index (aka zonkracht). Afspraken waaraan ook WeerOnline zich heeft te houden, neem ik aan...
"Until recently, the methods of calculating and reporting a UV index varied from country to country. Today, a worldwide UV index, standardized by the World Health Organization (WHO), has replaced the inconsistent regional methods. The international UV index not only specifies a uniform calculation method but also standard colors and graphics for printed media."
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