Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh13a1518w&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SH13A-1518
Physics
7524 Magnetic Fields, 7529 Photosphere, 7536 Solar Activity Cycle (2162), 7537 Solar And Stellar Variability (1650), 7544 Stellar Interiors And Dynamo Theory
Scientific paper
The ultimate fate of the magnetic flux introduced into the solar photosphere by active region (AR) emergence is unknown, but some process(es) must remove it from the photosphere: over each 11-year sunspot cycle, about 3000 ARs emerge, many introducing on the order of 1021 Mx of flux into the photosphere, and most (if not all) of this flux disappears over the cycle. Does AR flux submerge, a process that might underlie observed "flux cancellation" events? Does diffusion destroy AR flux in-place? Is photospheric flux from ARs somehow removed by ejection into the heliosphere? We expect some of these processes to affect the evolution of the spatial distribution of magnetic flux in individual ARs. Accordingly, we investigate the evolution of AR flux in MDI full-disk magnetograms of several active regions from 1996-1998 that reappear on the disk (which is relatively empty at this phase of the cycle) at least once. In addition, we characterize changes in the distribution functions of flux concentrations within each active region from one appearance to the next. Log- normal distributions, indicative of fragmentation and merging, have been found in snapshots of ARs fields, but the evolution of these distributions within individual ARs has yet to be characterized. This work is supported by the NSF, under grant ATM-051438.
Li Yadong
Welsch Brian Thomas
No associations
LandOfFree
Active Region Flux Dispersal 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 Active Region Flux Dispersal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active Region Flux Dispersal will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1246501