Physics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995soph..156..205t&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 156, no. 2, p. 205-219
Physics
13
Planetary Waves, Solar Magnetic Field, Solar Physics, Sun, Vortices, Computerized Simulation, Cyclones, Latitude, Shear Flow, Solar Rotation
Scientific paper
A numerical simulation of the process of generation of the magnetic field by Rossby vortices, whose horizontal scale is comparable to the solar radius, has been carried out. Long-lived vortices form global magnetic structures (GMS) that drift together with vortices. Differential rotation in latitude leads to a longer lifetime of cyclones and corresponding magnetic structures. The cyclone and the magnetic structure travel in longitude with the velocity close to a corresponding differential rotation velocity and drift slowly poleward. The interaction of cyclones located in close latitudes makes one of them move to higher latitudes and the poloidal component of the magnetic field to intensify during the interaction. The formation of large-scale vortices was simulated, when the initial condition was specific by a grid of small-scale vortices with a random amplitude distribution. Merging of vortices of the same sign leads to the formation of large-scale vortices whose size is determined by the geometry of the problem and by the differential rotation profile.
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