Modeling a Maunder Minimum

Details Modeling a Maunder Minimum Modeling a Maunder Minimum

2008-01-15

arxiv.org/abs/0801.2156v1

Astron. Nachr. 329, 351-358 (2008)

Astronomy and Astrophysics

Astrophysics

8 pages, 6 figures, Astron. Nachr. (submitted)

Scientific paper

10.1002/asna.200810973

We introduce on/off intermittency into a mean field dynamo model by imposing stochastic fluctuations in either the alpha effect or through the inclusion of a fluctuating electromotive force. Sufficiently strong small scale fluctuations with time scales of the order of 0.3-3 years can produce long term variations in the system on time scales of the order of hundreds of years. However, global suppression of magnetic activity in both hemispheres at once was not observed. The variation of the magnetic field does not resemble that of the sunspot number, but is more reminiscent of the 10 Be record. The interpretation of our results focuses attention on the connection between the level of magnetic activity and the sunspot number, an issue that must be elucidated if long term solar effects are to be well understood.

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