Physics
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...98..219s&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 98, Aug. 1985, p. 219-239. Navy-supported research.
Physics
75
Magnetic Flux, Solar Magnetic Field, Sunspot Cycle, Magnetic Field Configurations, Magnetic Measurement, Random Walk, Twenty-Seven Day Variation
Scientific paper
Regarding new bipolar magnetic regions as sources of flux, the evolution of the photospheric magnetic field during 1976-1984 was computed and the corresponding evolution of the mean line-of-sight field as seen from earth was derived. A good, but imperfect, agreement was obtained between the observed mean field and the field computed for a nominal choice of flux transport parameters. The response of the computed mean field to variations in the transport parameters and the source properties was determined. The results suggest that the mean-field evolution is a random-walk process with dissipation. New eruptions of flux produce the random walk, and together differential rotation, meridional flow, and diffusion provide the dissipation. The net effect of each new source depends on its strength and orientation and on the time elapsed before the next eruption.
Boris Jay P.
DeVore Richard C.
Sheeley Neil R. Jr.
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