Stochastic Properties of Solar Activity Proxies

  • Kristoffer Rypdal
  • Martin Rypdal
Conference paper
Part of the Astrophysics and Space Science Proceedings book series (ASSSP, volume 33)


The sunspot number (SSN), the total solar irradiance (TSI), a TSI reconstruction, and the solar flare index (SFI) are analyzed for long-range persistence. The SSN, TSI, and TSI reconstruction are almost certainly long-range persistent with most probable Hurst exponent H ≈ 0. 7. The SFI process, however, is either very weakly persistent (H < 0. 6) or completely uncorrelated.


Sunspot Number Hurst Exponent Total Solar Irradiance Detrended Fluctuation Analysis Sunspot Cycle 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of Physics and TechnologyUniversity of TromsøTromsøNorway
  2. 2.Department of Mathematics and StatisticsUniversity of TromsøTromsøNorway

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