Abstract
Recent observations indicate that the latitudinal profile of the magnetic flux shows a pronounced decrease close to the solar north pole during the minimum phase of solar cycle 23. Using a surface flux transport model, we have performed numerical experiments to study the conditions that could lead to such a latitudinal distribution. We find that a strong decrease of the magnetic field near the poles results if a weak countercell of the meridional flow at high latitudes with an equatorward speed of a few m s–1 is present.
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