Other
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.535..807m&link_type=abstract
In: Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2
Other
13
Sun: Magnetic Fields, Polar Crown Filaments, Coronal Holes, Large-Scale Motions, Polarity Patterns
Scientific paper
H-alpha synoptic charts compiled in Boulder now document large-scale solar activity for 38 years. This set of over 500 charts shows patterns of magnetic polarity in full agreement with Kitt Peak and other magnetic-field synoptic charts. By emphasizing the boundaries between polarities, which are marked with high resolution by structures in the solar atmosphere, we see the dynamics of magnetic fields more clearly than any previous synoptic database. More accurately, we see the dynamics of the sources of magnetic fields. These charts combine filaments, active regions and coronal holes with the magnetic-field patterns, giving new insight to the origin and disappearance of those three fundamental solar phenomena. The most starting revelation by H-alpha charts in Cycle 23 is that our definition of coronal holes as areas of open field lines is incomplete. The motions and evolutions of coronal holes seen with HeI 10830, show behaviors that precede changes in magnetic fields and often without any distinctive change at all in those fields. The changes among coronal holes are coordinated and the changes are synchronized with the solar cycle. These data demand a fresh start to our models of the solar cycle. That model must deal with the dynamics of magnetic field origin and regeneration.
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