The phase of the radial mean field in the solar dynamo.

Details The phase of the radial mean field in the solar dynamo. The phase of the radial mean field in the solar dynamo.

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...302..264s&link_type=abstract

Astronomy and Astrophysics, v.302, p.264

Astronomy and Astrophysics

Astrophysics

19

Mhd, Sun: Activity, Sun: Magnetic Fields

Scientific paper

Observations indicate that the radial and azimuthal components of the mean solar magnetic field oscillate with a phase shift of approximately 180deg during the 22-year cycle. In order to calculate such phase shifts we construct a simple two-dimensional, nonlinear α^2OMEGA dynamo, which operates in the overshoot region beneath the convection zone. Like previous models, our model predicts an almost in-phase oscillation for most parameter choices. Special configurations, in which the two components of the mean field have different distributions in latitude, may resolve the dilemma. Alternative conclusions are that our knowledge of the α effect is insufficient, or that the observational result is not reliable.

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