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The Gleissberg Cycle of Minima |
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| Authors: | Garcia Adriana Mouradian Zadig |
| Affiliation: | (1) Observatorio Astronomico da Universidade de Coimbra, Portugal;(2) Observatoire de Paris-Meudon, DASOP, F-92195 Meudon Cedex, France |
| Abstract: | In this short article we show that the sunspot cycle minima exhibit a long cycle (Gleissberg) in addition to the 11-yr cycle. From 1750 onwards, three periods of the Gleissberg cycle can be detected. |
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