Licht-im-Terrarium: Literaturdatenbank
Licht-im-Terrarium: Literaturdatenbank |
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Engelsen, O., Brustad, M., Aksnes, L., & Lund, E. (2005). Daily duration of vitamin d synthesis in human skin with relation to latitude, total ozone, altitude, ground cover, aerosols and cloud thickness. Photochemistry and Photobiology, 81, 1287–1290. Added by: Sarina (09/09/2009, 13:29) Last edited by: Sarina (21/05/2014, 14:45) |
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| Resource type: Journal Article BibTeX citation key: Engelsen2005 View all bibliographic details  |
Categories: Englisch = English Keywords: Sonne = Sun, Vitamin D = Vitamin D Creators: Aksnes, Brustad, Engelsen, Lund Collection: Photochemistry and Photobiology |
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| Abstract |
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Vitamin D production in human skin occurs only when incident UV radiation exceeds a certain threshold. From simulations of UV irradiances worldwide and throughout the year, we have studied the dependency of the extent and duration of cutaneous vitamin D production in terms of latitude, time, total ozone, clouds, aerosols, surface reflectivity and altitude. For clear atmospheric conditions, no cutaneous vitamin D production occurs at 51 degrees latitude and higher during some periods of the year. At 70 degrees latitude, vitamin D synthesis can be absent for 5 months. Clouds, aerosols and thick ozone events reduce the duration of vitamin D synthesis considerably, and can suppress vitamin D synthesis completely even at the equator. A web page allowing the computation of the duration of cutaneous vitamin D production worldwide throughout the year, for various atmospheric and surface conditions, is available on the Internet at http://zardoz.nilu.no/~olaeng/fastrt/VitD.html and http://zardoz.nilu.no/~olaeng/fastrt/VitD-ez.html. The computational methodology is outlined here.
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