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Solar flux and its variations

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Abstract

We present data on the solar irradiance as derived from a number of sources. An attempt was made to bring these data onto a uniform scale. The results are presented in Table IV and Figure 6. Summation of fluxes at all wavelengths yields a figure of 1357.826 W m-2 for the solar constant. Estimates are made of the solar flux variations due to flares, active regions (slowly varying component), solar rotation and the 11-year cycle.

Solar activity does not produce a significant variation in the value of the solar constant. Nevertheless, variations in the X-ray and extreme ultraviolet portions of the solar flux may be several orders of magnitude during solar activity, especially at times of major flares. It is well established that these short wavelength flux enhancements cause significant changes in the terrestrial ionosphere.

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  1. Astronomy Program Univ. of Maryland, 20742, College Park, Md., USA

    Elske V. P. Smith & David M. Gottlieb

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Smith, E.V.P., Gottlieb, D.M. Solar flux and its variations. Space Sci Rev 16, 771–802 (1974). https://doi.org/10.1007/BF00182600

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