Physics
Scientific paper
Jan 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007soph..240..153t&link_type=abstract
Solar Physics, Volume 240, Issue 1, pp.153-164
Physics
12
Sun: Spot Zone, Butterfly Diagram, Solar Cycle
Scientific paper
The present work describes the evolution of the sunspot zone in cycles 20, 21, and 22. In each cycle, and in both hemispheres, the equatorward drift of the spot zone “center of mass” results from the alternation of five or six prograde (namely, equatorward) segments, with other stationary or poleward segments. The duration of the stationary/retrograde phases (resulting from averaging data pertaining to the six semicycles examined here) amounts to ≈36% of the total duration of these semicycles. In the prograde phases, the drift rate is almost twice the “traditional” equatorward rate, resulting only from the extreme positions of the spot zone center of mass (at the beginning and at the end of the cycle). If there were no stationary/retrograde phases, the cycle duration would be half the actual one. We conclude that the retrograde phases should not be regarded as accidental; rather, they are essential features of the 11-year cycle.
No associations
LandOfFree
The Butterfly Diagram Fine Structure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Butterfly Diagram Fine Structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Butterfly Diagram Fine Structure will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1658766