Other
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spd....31.0106d&link_type=abstract
American Astronomical Society, SPD Meeting #31, #01.06; Bulletin of the American Astronomical Society, Vol. 32, p.802
Other
1
Scientific paper
We study several large (45-degree square) fields of supergranules for as long as they remain visible on the solar disk (about 6 days) to characterize the dynamics of the supergranular flow field and its interaction with surrounding photospheric magnetic field elements. These flow fields are determined by applying correlation tracking methods to time series of mesogranules seen in full-disk SOI-MDI velocity images. We have shown previously that mesogranules observed in this way are systematically advected by the larger scale supergranular flow field in which they are embedded. Applying correlation tracking methods to such time series yields the positions of the supergranular outflows quite well, even for locations close to disk center. These long-duration datasets contain several instances where individual supergranules are recognizable for time scales as long as 50 hours, though most cells persist for about 25 hours that is often quoted as a supergranular lifetime. Many supergranule merging and splitting events are observed, as well as other evolving flow patterns such as lanes of converging and diverging fluid. By comparing the flow fields with the corresponding images of magnetic fields, we confirm the result that small-scale photospheric magnetic field elements are quickly advected to the intercellular lanes to form a network between the supergranular outflows. In addition, we characterize the influence of larger-scale regions of magnetic flux, such as active regions, on the flow fields. Furthermore, we have measured even larger-scale flows by following the motions of the supergranules, but these flow fields contain a high noise component and are somewhat difficult to interpret. This research was supported by NASA through grants NAG 5-8133 and NAG 5-7996, and by NSF through grant ATM-9731676.
de Rosa Marc L.
Lisle Jason P.
Toomre Juri
No associations
LandOfFree
Evolving Dynamics of the Supergranular Flow Field 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 Evolving Dynamics of the Supergranular Flow Field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolving Dynamics of the Supergranular Flow Field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1347984