About-10-yearly (circadecennian) cosmo-helio-geomagnetic signatures in Acetabularia

D. Hillman, G. Katinas, Germaine G Cornelissen-Guillaume, J. Siegelová, J. Dušek, J. Jančík, M. Mašek, F. Halberg

Research output: Contribution to journalReview articlepeer-review

2 Scopus citations


Infradian aspects of Acetabularia are explored in a composite time series consisting of about 200 individual series collected during 1980-1991. The total duration of each study on a given cell and the duration of the initial span of light and darkness alternating at 12-hour intervals were taken as admittedly complex gauges of the alga. These two indices obtained from each cell were assigned to the midpoint of the corresponding study span. The series thus formed were analysed chronobiologically. In addition to a circannual variation, an about 10-year component was found and compared to the time structure of the planetary geomagnetic activity.

Original languageEnglish (US)
Pages (from-to)303-308
Number of pages6
JournalScripta Medica Facultatis Medicae Universitatis Brunensis Masarykianae
Issue number6
StatePublished - 2002


  • About-ten-year-rhythm
  • Acetabularia
  • Alga
  • Cosmo-helio-geomagnetism


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