Near-transyear in solar magnetism

Germaine G Cornelissen-Guillaume, K. Otsuka, F. Halberg

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Daily data on solar magnetism, available from May 1975 to April 2002, were analyzed by linear-nonlinear rhythmometry, with particular focus on the near-transyear, slightly longer than the calendar year. The time structure of solar magnetism is compared to that of solar activity, gauged by Wolf numbers. An about 27-day component corresponding to the solar rotation period, is common to both variables but differs in harmonic content. About 10-year component characterizes solar activity but not solar magnetism. A near-transyear with a period of about 1.05 years is detected in solar magnetism. In solar activity, a near-transyear is also found but its period of about 1.10 years is longer than that characterizing solar magnetism, and it may be paired with an about 0.9-year component to correspond to an about 10-year modulation in amplitude or phase of an about-yearly component.

Original languageEnglish (US)
Pages (from-to)S5-S9
JournalBiomedicine and Pharmacotherapy
Issue numberSUPPL. 1
StatePublished - Oct 2005


  • Chronome
  • Near-transyear
  • Solar activity
  • Solar magnetism
  • Wolf numbers


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