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Solar Activity Indices in the Cycles 21–23

  • A. A. Borisov
  • E. A. Bruevich
  • I. K. Rozgacheva
  • G. V. Yakunina
Conference paper
Part of the Astrophysics and Space Science Proceedings book series (ASSSP, volume 30)

Abstract

A stable cyclicity of correlation coefficients K corr for some solar activity indices versus F 10.7 was found after monthly averages values analysis. These indices are: Wolf numbers, 10.7 cm radio flux F 10.7, 0.1–0.8 nm background, the total solar irradiance (TSI), Mg II UV-index (280 nm core to wing ratio) and monthly flare count/10. The correlation coefficients of the linear regression of these solar indices versus F 10.7 were analyzed for every year in solar cycles 21, 22 and unusual cycle 23. We found out that the values of yearly determined correlation coefficients K corr for solar activity indices versus F 10.7 show the cyclic variations with stable period closed to half length of 11-year cycle.

Keywords

Solar Activity Solar Cycle Total Solar Irradiance Solar Activity Cycle Wolf Number 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors thank the RFBR Grant 09-02-01010 and FCPK Grant N 16. 740. 11. 0465 for support of the work.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • A. A. Borisov
    • 1
  • E. A. Bruevich
    • 2
  • I. K. Rozgacheva
    • 1
  • G. V. Yakunina
    • 2
  1. 1.Moscow State Pedagogical UniversityMoscowRussia
  2. 2.Sternberg Astronomical Institute, MSUMoscowRussia

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