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Pyrheliometric determination of atmospheric turbidity in the harmattan season over Ile-Ife, Nigeria

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  • Adeyefa, Z.D.
  • Adedokun, J.A.

Abstract

Measurements of direct solar radiation intensity, using an Angström compensation pyrheliometer carried out over three harmattan seasons (1985–1987) at Ile-Ife (7°29′N, 4°34′E), Nigeria, have been used to determine atmospheric turbidity based on five different models of turbidity viz:: Schüepp (B), Angstrom (β), Kastrov (C), Unsworth (τa) and Linke (T). The five parameters indicate high aerosol loading of the atmosphere during the period and high correlation is established between them: (0.919 ⩽ r ⩽ 0.999). An inverse relationship has been noticed between horizontal visibility and atmospheric turbidity: (−0.80 ⩽ r ⩽ −0.76).

Suggested Citation

  • Adeyefa, Z.D. & Adedokun, J.A., 1991. "Pyrheliometric determination of atmospheric turbidity in the harmattan season over Ile-Ife, Nigeria," Renewable Energy, Elsevier, vol. 1(3), pages 555-566.
    • Handle: RePEc:eee:renene:v:1:y:1991:i:3:p:555-566
    DOI: 10.1016/0960-1481(91)90071-V
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    Cited by:

    1. Samuel Chukwujindu, Nwokolo, 2017. "A comprehensive review of empirical models for estimating global solar radiation in Africa," Renewable and Sustainable Energy Reviews, Elsevier, vol. 78(C), pages 955-995.
    2. Adeyefa, Z.D. & Holmgren, B. & Adedokun, J.A., 1995. "Spectral solar irradiance under Harmattan conditions," Renewable Energy, Elsevier, vol. 6(8), pages 989-996.

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