Poleward migration of the magnetic neutral line and the reversal of the polar fields on the sun. I - Period 1945-1981

Details Poleward migration of the magnetic neutral line and the reversal of the polar fields on the sun. I - Period 1945-1981 Poleward migration of the magnetic neutral line and the reversal of the polar fields on the sun. I - Period 1945-1981

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...85..215m&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 85, June 1983, p. 215-226.

Physics

50

Lines Of Force, Magnetic Field Configurations, Magnetic Poles, Solar Magnetic Field, Drift Rate, Latitude, Long Term Effects, Northern Hemisphere, Polarity, Temporal Distribution

Scientific paper

Poleward migration of the magnetic neutral line on the sun has been calculated for the periods 1945-1950 and 1955-1981 using synoptic charts based on H-alpha observations. Epochs of sign reversal of the solar magnetic field at latitudes 50 to 90 deg have been determined for these periods. During the cycles 19 and 20 a threefold sign reversal took place in the northern hemisphere. During all the above cycles both the solar poles were of one polarity for a period ranging from 0.5 to 1 year. The poleward drift velocity of the magnetic neutral line varies from 6 to 29 m/s and seems to depend on the strength of the cycle.

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