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Actinic flux and global radiation

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Summary

The observed relationship between global radiation and actinic flux in a radiation experiment above grassland corresponds well with the theoretical relationship expressed by Madronich.

As a direct consequence of this relationship the photosynthetic light compensation point, determined in the field with an actinic flux sensor, must occur earlier in the morning and later in the evening than when determined with a global radiation sensor. For plants, an actinic flux day is longer than a global radiation day.

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Authors and Affiliations

  1. Institute of Marine and Atmospheric Research, Utrecht University, Utrecht, The Netherlands

    J. C. H. van der Hage

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  1. J. C. H. van der Hage
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van der Hage, J.C.H. Actinic flux and global radiation. Theor Appl Climatol 46, 173–177 (1992). https://doi.org/10.1007/BF00866097

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  • DOI: https://doi.org/10.1007/BF00866097

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