Abstract
A simplified spectral model for retrieval of direct, diffuse and global UV spectral irradiances on clear sky conditions in Portugal is presented. The model consists on a simplification of the exact codes used on conventional radiative transfer models, assuming a single homogeneous layer and applying the Beer’s law formalism, based on models of the same type developed by other authors. The model allows the use of average values of total ozone, aerosol optical depth and precipitable water content according to the available climatological data. UV Erythemally effective irradiances were computed in order to study its geographical variation in Portugal Mainland due to altitude and latitude changes.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Bird, R.E. (1984) A simple. solar spectral model for direct-normal and diffuse horizontal irradiance.Solar Energy 32. 461.
Leckner, B. (1978) The spectral distribution of solar radiation at the Earth’s surface — elements of a model. Solar Energy 20. 143
Brine, D. T., Iqbal M. (1982) Solar spectral diffuse irradiance under cloudless skies. The Renewable Challenge Vol. 2.
Koepke P., Balis D., Buchwitz M., De Backer H., Cabo X., Eckert P., Eriksen P., Gillotay D., Heikkily A., Koskela T., Lapeta B., Lityinska Z., Lorerste J., Mayer B., Renaud A., Ruggaber A., Schauberger G., Seckmeyer G., Seifert P.,Schmahwiescr A., Schwander H., Vanicek K., Weber M. (1998) Comparison of Models Used for UV Index Calculations. Photochemistry and Photobiology 67(6). 657
Carvalho, F.R.S (1998). Radiative Transfer Simplified Spectral Model for Clear Sky conditions in Portugal. MSC Thesis dissertation. Faculty of Sciences - University of Lisbon.
Kneizys E. X., Shettle E. P.. Gallery W. O.. Chetwynd 1r., H., Abren. L. W., Selby. J. E. A., Fenn and McClatchey. R. A. (1980) Atmospheric Transmittance/Radiance: Computer Code LOWTRAN 5. Tech. Rep. AFGL-TR-80–0067. US Air Force Geophysics Laboratory. Bedford, Massachusetts.
Kneizys F.. Abren. L.. Anderson. Chetwynd. J.. Sheltie, E., Berk, A., Bernstein, L., Robertson, D., Acharya, P., Rothman, L., Selby. J.. Gallery, W.. Clough. S. (1996) The MODTRAN 2/3 Report and LOWTRAN 7 MODEL. Philips Laboratory. Geophysics Directorate.
Kasten (1966) A new table and approximation formula for the relative optical air mass, Arch. Met. Geoph. Biol. Serie B 14, 206.
Penndorf R.B., (1957) Tables of the refractive index for standard air and the Rayleigh scattering coefficient for the spectral region between 0.2 and 20 microns and their applications on atmospheric optics. J. Opt. Soc., Amer 47 (2). 176).
Angstrom, A.. (1961) Techniques of determining the turbidity of atmosphere. Tellus,XIII,214.
Paltridge G. W. and Platt, C. M. R. (1976) Radiative processes in meteorology and climatology. Elsevier, New York, p.32.
Davies, J. E. and Hay, J. E. (1980) Calculation of solar radiation incident on a horizontal surface. Proc. 1st Canadian Solar radiation Data Workshop.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2000 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Carvalho, F.R.S. (2000). A Simplified Spectral Model for UV Irradiance Computations. In: Zerefos, C.S., Isaksen, I.S.A., Ziomas, I. (eds) Chemistry and Radiation Changes in the Ozone Layer. NATO Science Series, vol 557. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4353-0_13
Download citation
DOI: https://doi.org/10.1007/978-94-011-4353-0_13
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-6514-3
Online ISBN: 978-94-011-4353-0
eBook Packages: Springer Book Archive