ATMOSPHERIC SUN PROTECTION FACTOR ON CLEAR DAYS: ITS OBSERVED DEPENDENCE ON SOLAR ZENITH ANGLE AND ITS RELEVANCE TO THE SHADOW RULE FOR SUN PROTECTION

@article{Holloway1992ATMOSPHERICSP,
  title={ATMOSPHERIC SUN PROTECTION FACTOR ON CLEAR DAYS: ITS OBSERVED DEPENDENCE ON SOLAR ZENITH ANGLE AND ITS RELEVANCE TO THE SHADOW RULE FOR SUN PROTECTION},
  author={L Holloway},
  journal={Photochemistry and Photobiology},
  year={1992},
  volume={56}
}
  • L. Holloway
  • Published 1 August 1992
  • Physics, Environmental Science
  • Photochemistry and Photobiology
Global irradiances measured in seven 5‐nm bands of UV‐B at Rockville, MD (39.1°N, 77.1oW) on 28 clear days near the summer solstice are convoluted with the erythemal action spectrum of human skin to determine dose rates at various hours of the day. These rates are averaged with respect to solar zenith angle to obtain the diurnal variation of mean dose rate and of the Sun Protection Factor (SPF) of the atmosphere (reciprocal of the normalized atmospheric transmissivity) on a typical clear summer… 
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