Abstract The mid-term periodicities of polar faculae are studied separately for the total disk, northern and southern hemispheres of the Sun for a time interval from 1951 August to 1998 December. Apart from the 11-year Schwabe cycle which is the fundamental period and is found in all of the three time series, the following prominent results are found: (1) the rotational periodicity of solar activity at high latitudes is approximately from 28 to 32days; (2) a large number of quasi-periods appearing in low-latitude solar activity (annual variation, 1.3–1.7years, quasi-biennial oscillation, and 4–5years) also exist in polar faculae; (3) the periodicities on both hemispheres are not identical.
On mid-term periodicities of high-latitude solar activity
Advances in Space Research ; 54 , 1 ; 125-131
2014-03-04
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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