Early Reversal of the Sun's Polar Field - Is Solar Cycle 24 Already Peaking?

Details Early Reversal of the Sun's Polar Field - Is Solar Cycle 24 Already Peaking? Early Reversal of the Sun's Polar Field - Is Solar Cycle 24 Already Peaking?

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh33a2044h&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH33A-2044

Astronomy and Astrophysics

Astrophysics

[7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7536] Solar Physics, Astrophysics, And Astronomy / Solar Activity Cycle, [7924] Space Weather / Forecasting

Scientific paper

Long-term measurements of the Sun's poles show that reversal of the dominant magnetic polarity generally occurs within a year of solar maximum. Current observations suggest that the northern polar field above 55 degrees will reverse by early 2012. The southern pole will reverse a few months later. If a smaller polar cap is considered, the reversal will be observed to occur later, since the flux that reverses the field comes from lower latitude. Because the polar field was so weak during the last minimum, a smaller amount of flux is required to accomplish the reversal this cycle. If the historic relationship holds, the current weak solar cycle may already be near its maximum.

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