Ultraviolt solar radiation over Egypt

Shaltout, Mosalam; Ghonim, M.M.; Trabea, A.A.; Allam, H.

doi:10.1016/0960-1481(94)90197-x

Cited by 5 publications

(1 citation statement)

References 5 publications

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“…In Egypt measurements of global solar radiation began in 1956 in Cairo and 1980 in Aswan. The ultraviolet solar radiation measurements in Cairo and Aswan were combined in 1990 using Epply radiometer, since it is sensitive to the solar radiation in the band 295 -385 nm [6] .…”

Section: Introductionmentioning

confidence: 99%

Empirical Relationship for Ultraviolet Solar Radiation Over Egypt

2001

Egyptian Journal of Solids

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The ultraviolet component of solar radiation was measured in Egypt for the last years by the Meteorological Authority of Egypt, in Cairo and Aswan stations. Cairo represents the typical weather conditions for Lower Egypt and Aswan represents the typical weather conditions for Upper Egypt. Measured data of global and ultraviolet solar radiation in Cairo and Aswan for the period (1990-1992) have been processed, arranged, discussed and used to investigate an empirical relationship with correlation coefficient 96%. This empirical relationship was used in calculating the ultraviolet component of solar radiation in Cairo, Aswan and other selected locations(Matrough, Al-Arish, Bahtim and Al-Kharga) during other two years (1993 and 1994). The calculated values of ultraviolet radiation were compared with the measured data at both Cairo and Aswan sites and were in a good agreement. This encourages the use of the empirical formula in calculating the components of ultraviolet solar radiation at any other location over Egypt .

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Section: Introductionmentioning

confidence: 99%

Empirical Relationship for Ultraviolet Solar Radiation Over Egypt

2001

Egyptian Journal of Solids

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Solar ultra-violet radiation changes in Bahrain

Alnaser¹

1997

Applied Energy

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Influences of the clearness index for the whole spectrum and of the relative optical air mass on UV solar irradiance for two locations in the Mediterranean area, Valencia and Cordoba

Cañada¹,

Pedrós²,

Lopez³

et al. 2000

J. Geophys. Res.

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Abstract. Ultraviolet solar irradiance (290-385 nm) was analyzed in Valencia and IntroductionUltraviolet solar radiation has a significant influence on the Earth's atmosphere. In the stratosphere the absorption of ultraviolet radiation causes an increase of the air temperature in the upper atmospheric layers and is the origin of the existence and variability of stratospheric ozone. On the surface, UV solar radiation represents a small part of the spectrum, although it is an important part because of its biological and photochemical effects. Thus a clear awareness of its availability and its variation, both temporal and spatial, is of great importance in many research areas: (1) Several studies have been conducted to quantify the attenuation of UV radiation by clouds. Factors such as cloud location, percent cover, cloud optical thickness, liquid water content, and particle distribution make it difficult to develop a quantitative relationship relating cloud properties to the attenuation of UV radiation. Some authors [Zavodska and Reichrt, 1985] classify the daily total and UV radiation measurements using the cloud amount as a parameter. Cloud cover is not a very objective measurement because it may be related to very different sky conditions, depending on the relative Sun-cloud position. In this sense, Estupi•an et al. [1996] showed that for the same cloud cover, reductions of up to 99% or increases of up to 27% of UV radiation may be produced with respect to the same measurement on clear days in terms of whether or 4759

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Ultraviolt solar radiation over Egypt

Cited by 5 publications

References 5 publications

Empirical Relationship for Ultraviolet Solar Radiation Over Egypt

Empirical Relationship for Ultraviolet Solar Radiation Over Egypt

Solar ultra-violet radiation changes in Bahrain

Influences of the clearness index for the whole spectrum and of the relative optical air mass on UV solar irradiance for two locations in the Mediterranean area, Valencia and Cordoba

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