Hale cycle


Also found in: Wikipedia.

Hale cycle

[′hāl ‚sī·kəl]
(astronomy)
The variation of the sun's magnetic field over a period of approximately 22 years, during which the field reverses and is restored to its original polarity; one such cycle comprises two successive sunspot cycles.
References in periodicals archive ?
The purpose for computing the 2-cma values is to determine the local and overall trend in SC parametric values where this trend might possibly relate to the variation associated with the Hale cycle. The Hale cycle refers to the hemispheric magnetic polarity variation over two consecutive sunspot cycles.