Ground-level solar spectral irradiance in Glasgow: An inter-comparison of two sites

Harry Moseley*, I. Clark, A. Pearson, J. Smyth, H. Oliver, R. M. Mackie

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Solar spectral radiometry presents significant challenges to produce accurate and reproducible data. To investigate the reliability of the measurements, several inter-comparisons have been set up. Although these are useful, their main drawback is that equipment must be dismantled and transported to a common site and re-calibrated. Methods: In this study, an inter-comparison has been performed of two spectroradiometers that are located 3 miles apart some 30 m above sea level. These two systems have operated using different calibration techniques. Data were compared on clear days, to minimise actual differences in ultraviolet irradiation. Results: There were substantial differences at some individual wavelength points, but overall the mean difference of results at 5 nm intervals on an individual scan from the two systems agreed to within 11%. If the data were used to compute the erythemal irradiance, the differences were reduced to 4%. Conclusion: This study demonstrates both the limitations and the level of reliability that might be expected from these systems operating under careful scientific supervision.

Original languageEnglish
Pages (from-to)138-143
Number of pages6
JournalPhotodermatology Photoimmunology and Photomedicine
Volume20
Issue number3
DOIs
Publication statusPublished - Jun 2004

Keywords

  • Inter-comparison
  • Spectroradiometer
  • Sunlight

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