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Geophysical Research Letters
Article . 1993 . Peer-reviewed
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Variations in the period of the sunspot cycle

Authors: Andrew R. Ochadlick; Haralambos N. Kritikos; Robert Giegengack;

Variations in the period of the sunspot cycle

Abstract

Using a wavelet analysis approach, subtle variations in the solar cycle period were extracted from the yearly means of the sunspot numbers. For the nominal eleven‐year solar cycle, the resulting estimates of the cycle's period are in good agreement with those given by Friis‐Christensen and Lassen. Longer period structures in the solar‐cycle, including the Gleissberg cycle, are also delineated by the wavelet analysis.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
31
Top 10%
Top 10%
Average
gold