Physics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...77...27g&link_type=abstract
Solar Physics, vol. 77, Apr. 1982, p. 27-42.
Physics
25
Magnetic Flux, Magnetic Signatures, Photosphere, Polarity, Solar Magnetic Field, Sunspot Cycle, Chromosphere, Multipolar Fields, Solar Atmosphere, Solar Rotation
Scientific paper
Solar photospheric fields are surveyed by dividing the sun into a region below latitude 60 deg, where characteristics are studied directly, and above 60 deg, where the large angles of lines-of-sight to the normal make direct observations more difficult to interpret. Using measurements based on daily magnetograms from Kitt Peak National Observatory, the magnetic fluxes in unipolar and mixed-polarity regions are studied and variations with the solar cycle are determined. At low latitudes around sunspot minimum, mixed polarities are seen to predominate, while unipolar regions predominate around sunspot maximum. There is strong latitude variation of the classes of field during the sunspot cycle. Polar unipolar fields are seen to be weak on the whole (a major field strength of 4 G for six typical days in 1976-79), with small regions having stronger fields at times probably not exceeding a major field strength of 10 G.
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