Intermittent Behaviour in Axisymmetric Mean-Field Dynamo Models in Spherical Shells

Details Intermittent Behaviour in Axisymmetric Mean-Field Dynamo Models in Spherical Shells Intermittent Behaviour in Axisymmetric Mean-Field Dynamo Models in Spherical Shells

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.296..287t&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 296, Issue 2, pp. 287-295.

Astronomy and Astrophysics

Astronomy

24

Chaos, Sun: Activity, Stars: Activity, Stars: Magnetic Fields

Scientific paper

Axisymmetric mean-field dynamo models in spherical shells are shown to be capable of producing temporally intermittent behaviour. This is of potential importance since (i) it is, as far as we are aware, the first time such behaviour has been produced internally by a mean-field dynamo model in a spherical shell, without requiring any additional assumptions or truncations, and (ii) it may be characteristic of the type of behaviour observed in the long-term record of solar activity, such as Maunder minima. We also show that these types of behaviour persist when the functional form of the alpha quenching is altered and also occur over intervals of the shell thickness and the dynamo number.

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