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Journal Articles Advances in Science and Research Year : 2011

Solar irradiance in clear atmosphere: study of parameterisations of change with altitude

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Philippe Blanc
Benoît Gschwind
Mireille Lefèvre
Zhipeng Qu
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  • PersonId : 764126
  • IdRef : 17676755X
Lucien Wald

Abstract

Parameterisation of changes of the solar irradiance at ground level with a specific variable (e.g. solar zenithal angle, aerosol optical depth, altitude, etc.) is often used in operational processes because it saves computational time. This paper deals with the modelling of the vertical profile of downwelling solar irradiance for the first two kilometres above ground in clear sky conditions. Two analytical parameterisations are evaluated for direct and global irradiance in spectral bands as well as for the total irradiance. These parameterisations reproduce the vertical profile with good accuracy for global spectral irradiance and are less accurate for direct component, especially in turbid atmosphere. A piecewise linear interpolation technique using irradiance values known at surface and 4 altitudes every 500 m performs better in any case.
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Dates and versions

hal-00620372 , version 1 (07-09-2011)

Licence

Attribution - CC BY 4.0

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Armel Oumbe, Philippe Blanc, Benoît Gschwind, Mireille Lefèvre, Zhipeng Qu, et al.. Solar irradiance in clear atmosphere: study of parameterisations of change with altitude. Advances in Science and Research, 2011, 6, pp.199-203. ⟨10.5194/asr-6-199-2011⟩. ⟨hal-00620372⟩
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