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Home > NDACC Spectral UV Instrument Working Group > Health Effects of UV Radiation

Health Effects of UV Radiation

High quality spectral irradiance data from an NDACC site has demonstrated the relationship between erythemally weighted and vitamin d weighted UV.

Figure 1. Relationship between UVEry and UVVitD on a summer and winter day at 45°S.


This has been used to estimate the optimal exposure times to receive sufficient UV for vitamin D production, yet without inducing sunburn.


Figure 2. Exposure time for erythema and optimal vitamin D production as a function of UV Index for skin type II.


For more details, see McKenzie, R.L.; Liley, J.B.; Björn, L.O. (2009). UV Radiation: Balancing Risks and Benefits. Photochemistry and Photobiology 85, pp 88–98.

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Page last modified: Wednesday, 18-Nov-2009 20:30:34 UTC