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I made a poster! Three Cycles of the Solar Toroidal Magnetic Field and This Peculiar Minimum Abstract: Thirty-four years of WSO (Wilcox Solar Observatory) and thirteen years of SOHO/MDI (Michelson Doppler Imager) magnetograms have been studied to measure the east-west inclination angle, indicating the toroidal component of the photospheric magnetic field. This analysis reveals that the large-scale toroidal component of the global magnetic field is antisymmetric around the equator and reverses direction in regions associated with flux from one solar cycle compared to the next. The toroidal field revealed the first early signs of cycle 24 at high latitudes, especially in the northern hemisphere, appearing as far back as 2003 in the WSO data and 2004 in the MDI data. As in previous cycles, the feature is moving gradually equatorward. Cycles overlap and the pattern associated with each cycle lasts for about 17 years. Even though the polar field at the current solar minimum is significantly lower than during the three previous minima, the toroidal field pattern is largely the same.

I made a poster!

Three Cycles of the Solar Toroidal Magnetic Field and This Peculiar Minimum

Abstract:

Thirty-four years of WSO (Wilcox Solar Observatory) and thirteen years of SOHO/MDI (Michelson Doppler Imager) magnetograms have been studied to measure the east-west inclination angle, indicating the toroidal component of the photospheric magnetic field. This analysis reveals that the large-scale toroidal component of the global magnetic field is antisymmetric around the equator and reverses direction in regions associated with flux from one solar cycle compared to the next. The toroidal field revealed the first early signs of cycle 24 at high latitudes, especially in the northern hemisphere, appearing as far back as 2003 in the WSO data and 2004 in the MDI data. As in previous cycles, the feature is moving gradually equatorward. Cycles overlap and the pattern associated with each cycle lasts for about 17 years. Even though the polar field at the current solar minimum is significantly lower than during the three previous minima, the toroidal field pattern is largely the same.


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