Solar luminosity variations in solar cycle 21

Details Solar luminosity variations in solar cycle 21 Solar luminosity variations in solar cycle 21

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.332..810w&link_type=abstract

Nature (ISSN 0028-0836), vol. 332, April 28, 1988, p. 810-812.

Mathematics

Logic

163

Solar Flux Density, Solar Oscillations, Sunspot Cycle, Light Curve, Solar Spectra

Scientific paper

Long-term variations in the solar total irradiance found in the ACRIM I experiment on the SMM satellite have revealed a downward trend during the declining phase of solar cycle 21 of the sunspot cycle, a flat period between mid-1095 and mid-1987, and an upturn in late 1987 which suggests a direct correlation of luminosity and solar active region population. If the upturn continues into the activity maximum of solar cycle 22, a relation between solar activity and luminosity of possible climatological significance could be ascertained. The best-fit relationship for the variation of total irradiance S with sunspot number Rz and 10-cm flux F(10) are S = 1366.82 + 7.71 x 10 to the -3rd Rz and S = 1366.27 + 8.98 x 10 to the -3rd F(10)(W/sq m). These findings could be used to approximate total irradiance variations over the periods for which these indices have been compiled.

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