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B. H. Jacobsen

Grand solar minima and maxima deduced from 10Be and 14C: magnetic dynamo configuration and polarity reversal

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  • F. Inceoglu
  • ,
  • R. Simoniello, Univ Paris Diderot, CEA, University of Paris Diderot - Paris VII, Centre National de la Recherche Scientifique (CNRS), PRES University Sorbonne Paris Cite, Lab AIM, CEA DSM CNRS, IRFU SAp,Ctr Saclay
  • ,
  • M. F. Knudsen
  • C. Karoff
  • Jesper Olsen
  • S. Turck-Chieze, Univ Paris Diderot, CEA, University of Paris Diderot - Paris VII, Centre National de la Recherche Scientifique (CNRS), PRES University Sorbonne Paris Cite, Lab AIM, CEA DSM CNRS, IRFU SAp,Ctr Saclay
  • ,
  • B. H. Jacobsen

Aims. This study aims to improve our understanding of the occurrence and origin of grand solar maxima and minima.

Methods. We first investigate the statistics of peaks and dips simultaneously occurring in the solar modulation potentials reconstructed using the Greenland Ice Core Project (GRIP) Be-10 and IntCal13 C-14 records for the overlapping time period spanning between similar to 1650 AD to 6600 BC. Based on the distribution of these events, we propose a method to identify grand minima and maxima periods. By using waiting time distribution analysis, we investigate the nature of grand minima and maxima periods identified based on the criteria as well as the variance and significance of the Hale cycle during these kinds of events throughout the Holocene epoch.

Results. Analysis of grand minima and maxima events occurring simultaneously in the solar modulation potentials, reconstructed based on the C-14 and the Be-10 records, shows that the majority of events characterized by periods of moderate activity levels tend to last less than 50 years: grand maxima periods do not last longer than 100 years, while grand minima can persist slightly longer. The power and the variance of the 22-year Hale cycle increases during grand maxima and decreases during grand minima, compared to periods characterized by moderate activity levels.

Conclusions. We present the first reconstruction of the occurrence of grand solar maxima and minima during the Holocene based on simultaneous changes in records of past solar variability derived from tree-ring C-14 and ice-core Be-10, respectively. This robust determination of the occurrence of grand solar minima and maxima periods will enable systematic investigations of the influence of grand solar minima and maxima episodes on Earth's climate.

Original languageEnglish
Article numberA20
JournalAstronomy & Astrophysics
Volume577
Number of pages10
ISSN0004-6361
DOIs
Publication statusPublished - May 2015

    Research areas

  • Sun: activity, solar-terrestrial relations, WAITING-TIME DISTRIBUTION, COSMOGENIC NUCLIDE PRODUCTION, SELF-ORGANIZED CRITICALITY, POWER-LAW DISTRIBUTIONS, WAVELET TRANSFORM, NONLINEAR DYNAMOS, MERIDIONAL FLOW, RECONSTRUCTION, MODEL, FLUX

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