The recent 21st-cycle sign reversal in the polar magnetic field on the sun

Details The recent 21st-cycle sign reversal in the polar magnetic field on the sun The recent 21st-cycle sign reversal in the polar magnetic field on the sun

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pazh....8..631m&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 8, Oct. 1982, p. 631, 632) Soviet Astronomy Letters (ISSN 0360-0327), vol. 8, Sept.-Oct

Astronomy and Astrophysics

Astronomy

4

Magnetic Field Inversions, Solar Magnetic Field, Polar Coordinates, Solar Cycles, Solar Prominences

Scientific paper

The poleward motion of filament belts on the sun was analyzed in order to provide an estimation of when the polar magnetic field of the sun would reverse sign during the 21st solar cycle. It was determined that during the 21st solar cycle the polar magnetic field became negative at the north pole in December 1980 and positive at the south pole in September 1981. It is suggested that the underlying polar magnetic field on the sun may be concentrated within a thin photospheric surface layer. The polarity-reversal process was found to be accompanied by the development of arch prominences near the poles.

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