Editing Solar cycle (section)

=== Suess cycle ===

The '''Suess cycle''', or '''de Vries cycle''', is a cycle present in radiocarbon proxies of solar activity with a period of about 210 years.
It was named after [[Hans Eduard Suess]] and [[Hessel de Vries]].<ref name="Braun05" /> Despite calculated radioisotope production rates being well correlated with the 400-year sunspot record, there is little evidence of the Suess cycle in the 400-year sunspot record by itself.<ref name="hathaway_review" />