Solar Physics

, Volume 245, Issue 2, pp 411–414 | Cite as

Thousand-Year Cycle Signals in Solar Activity

Article

Abstract

Long-term variations of solar activity closely relate to terrestrial phenomena. More and more people attach importance to studies of long-term fluctuations of solar variation. However, because direct observations of solar activity are available only for the past four centuries, such studies are few. In this work, using the wavelet technique, the author investigates long-term fluctuations of reconstructed sunspot number series covering the past 11 400 years, with emphasis on the thousand-year cycle signals of solar variation. The results show a thousand-year cycle in solar activity.

Keywords

Solar activity Thousand-year cycle Wavelet transform 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.National Astronomical ObservatoriesChinese Academy of SciencesBeijingChina

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