| Full text | |
| Author(s): |
Braga, Hugo A.
;
Ambrizzi, Tercio
;
Hall, Nicholas M. J.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | THEORETICAL AND APPLIED CLIMATOLOGY; v. 155, n. 5, p. 17-pg., 2024-02-14. |
| Abstract | |
We investigate the possibility for the South Atlantic Convergence Zone (SACZ) to act as a Rossby wave source for global scale teleconnections. A simple heating perturbation is applied to numerical simulations using a baroclinic model with differing basic states. Sixteen days after the perturbation is applied, wave propagation is diagnosed within the subtropical latitudes of the Northern Hemisphere for the basic states corresponding to El Nino and neutral years, which have normal and strong westerly flow in the upper troposphere over the Equatorial Atlantic Ocean. For La Nina basic states, there is very little propagation over the Equatorial Atlantic Ocean because the westerly flow is weak, confining Rossby waves to the Southern Hemisphere. We conclude that the SACZ may act as interhemispheric Rossby wave source, providing the tropical westerly flow is strong enough to permit wave propagation across the Equatorial Atlantic Ocean. (AU) | |
| FAPESP's process: | 17/09659-6 - Interannual variability of the meridional transports across the SAMOC basin-wide array (SAMBAR) |
| Grantee: | Edmo José Dias Campos |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 14/50848-9 - INCT 2014: INCT for Climate Change |
| Grantee: | Jose Antonio Marengo Orsini |
| Support Opportunities: | Research Program on Global Climate Change - Thematic Grants |