| Full text | |
| Author(s): |
Teruya, Andre S. W.
;
Raphaldini, Breno
;
Raupp, Carlos F. M.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | FRONTIERS IN ASTRONOMY AND SPACE SCIENCES; v. 9, p. 10-pg., 2022-05-05. |
| Abstract | |
Rossby waves have been recently recognised for their role in the large-scale spatio-temporal organisation of the solar magnetic activity. Here, we study the propagation of magnetohydrodynamic Rossby waves in a thin layer, representing the solar tachocline. We consider the waves embedded in a meridionally varying background state characterised by a mean zonal flow, which mimics the differential rotation profile of the Sun, and a toroidal magnetic field. Two anti-symmetric toroidal magnetic fields are utilised: one having a global structure with the maximum at around 50(o) and the other characterised by a narrow band centered at around 20(o). We show that for a global structure toroidal magnetic field, the MHD Rossby modes undergo significant meridional propagation, either equatorward or poleward. In addition, the latitude where the waves exhibit a stationary behaviour is sensitive to the strength of the background magnetic field. On the other hand, a narrow band toroidal magnetic field is shown to work as a waveguide for the fast branch of MHD Rossby waves. (AU) | |
| FAPESP's process: | 20/14162-6 - Influence of moist convection on the geostrophic adjustment |
| Grantee: | André Seiji Wakate Teruya |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 15/50686-1 - Paleo-constraints on monsoon evolution and dynamics |
| Grantee: | Pedro Leite da Silva Dias |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 15/50122-0 - Dynamic phenomena in complex networks: basics and applications |
| Grantee: | Elbert Einstein Nehrer Macau |
| Support Opportunities: | Research Projects - Thematic Grants |