||Action Spectra and Their Key Role in Assessing Biological Consequences of Solar UV-B Radiation Change.
Caldwell, M. M. ;
Camp, L. B. ;
Warner, C. W. ;
Flint, S. D. ;
||Utah State Univ., Logan.;Corvallis Environmental Research Lab., OR.
Solar ultraviolet radiation ;
Radiation effects ;
Radiation damage ;
Biological radiation effects
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Action spectra of ultraviolet (UV) damage to plants must be used as weighting functions to (1) evaluate the relative increase of solar UV radiation that would result from a decreased atmospheric ozone layer, the radiation amplification factor--RAF; (2) evaluate the existing natural gradients of solar UV irradiance on the earth; (3) compare UV radiation from lamp systems in experiments with solar UV radiation in nature. Only if the relevant biological action spectra have certain characteristics is there a potential biological problem that would result from ozone reduction. Similarly, the existence of a natural latitudinal solar UV gradient is dependent on action spectrum characteristics.