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Proceedings Paper

Spectral solar UV monitoring: worth it?
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Paper Abstract

Monitoring of the terrestrial solar ultraviolet irradiance by using a radiometer is often considered as expensive and laborious or the data collected as insufficient in spatial coverage and in some cases in its temporal resolution, too. Therefore, alternative methods, all relying on modelling in one way or the other, have been developed. They differ in which input they receive, either standard meteorological information, space-based radiance measurements or ground-based irradiances from broadband or multiband UV radiometer or from pyranometer. A comparison of performance is presented between three methods during a 15-month period. The ground reference instrument is the Brewer Mk-III #107 spectroradiometer of the Observatory of Jokioinen, Finland. Compared to the reference, the space-based method overestimates the UV irradiance at noon by 14.6% and the pyranometer-based by 0.9% with root-mean-square differences of 35.5% and 10.4%, respectively. Daily erythemal doses agree by 3.8% for the space-based and 0.4% for the pyranometer-based method with a scatter of 16.5% and 4.6%, respectively. Spectral irradiances generated by the pyranometerbased model agree within 0.4% on average with a standard deviation of 17%. A rough estimate on the cost of each approach suggests that none of them is clearly superior to the others and the actual nature of the data needed may be used in decision making concerning monitoring strategies.

Paper Details

Date Published: 12 October 2006
PDF: 14 pages
Proc. SPIE 6362, Remote Sensing of Clouds and the Atmosphere XI, 63622A (12 October 2006); doi: 10.1117/12.689760
Show Author Affiliations
Tapani Koskela, Finnish Meteorological Institute (Finland)
Anu Heikkilä, Finnish Meteorological Institute (Finland)
Jussi Kaurola, Finnish Meteorological Institute (Finland)
Anders Lindfors, Finnish Meteorological Institute (Finland)
Aapo Tanskanen, Finnish Meteorological Institute (Finland)
Peter den Outer, Rijksinstituut voor Volksgezondheld en Millieu (Netherlands)

Published in SPIE Proceedings Vol. 6362:
Remote Sensing of Clouds and the Atmosphere XI
James R. Slusser; Klaus Schäfer; Adolfo Comerón, Editor(s)

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