Sunspot activity in the build-up to the extended solar minimum

Details Sunspot activity in the build-up to the extended solar minimum Sunspot activity in the build-up to the extended solar minimum

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh11a1497a&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SH11A-1497

Astronomy and Astrophysics

Astrophysics

[7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7536] Solar Physics, Astrophysics, And Astronomy / Solar Activity Cycle

Scientific paper

Comparison between the recent, extended, solar minimum (between Cycles 23 and 24) with the previous one (between Cycles 22 and 23) shows that one of the key distinctive features is the high degree of low latitude structure present in most, if not all, measures of solar activity. In particular, the surface magnetic configuration is significantly more complex in the more recent minimum than in the previous one and this has an impact throughout the heliosphere, leading to many of the observed discriminators used in the comparison of the minima (e.g. low latitude coronal holes, recurring fast solar wind streams). In this paper we categorize the emergence, magnetic structure, evolution and dispersion of sunspots in the years leading up to the two minima and investigate the role that these have in determining the nature of the subsequent solar minimum.

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