Editing Solar cycle (section)

=== Waldmeier effect ===

The '''Waldmeier effect''' describes the observation that the maximum amplitudes of solar cycles are inversely proportional to the time between their solar minima and maxima. Therefore, cycles with larger maximum amplitudes tend to take less time to reach their maxima than cycles with smaller amplitudes.<ref>{{cite journal | last1 = Du | first1 = Zhan-Le | last2 = Wang | first2 = Hua-Ning | last3 = He | first3 = Xiang-Tao | date = 2006 | title = The Relation between the Amplitude and the Period of Solar Cycles | journal = Chinese Journal of Astronomy and Astrophysics | volume = 6 | issue = 4| pages = 489–494 | bibcode = 2006ChJAA...6..489D | doi = 10.1088/1009-9271/6/4/12| s2cid = 73563204 | doi-access = free }}</ref> This effect was named after [[Max Waldmeier]] who first described it.<ref>[[Max Waldmeier|Waldmeier M.]], 1939, Astron. Mitt. Zurich, 14, 439</ref>