| Texto completo | |
| Autor(es): |
Braga, Hugo A.
;
Ambrizzi, Tercio
;
Hall, Nicholas M. J.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | THEORETICAL AND APPLIED CLIMATOLOGY; v. 155, n. 5, p. 17-pg., 2024-02-14. |
| Resumo | |
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) | |
| Processo FAPESP: | 17/09659-6 - Variabilidade interanual dos transportes meridionais através da rede transatlântica SAMOC (SAMBAR) |
| Beneficiário: | Edmo José Dias Campos |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 14/50848-9 - INCT 2014: INCT para Mudanças Climáticas (INCT-MC) |
| Beneficiário: | Jose Antonio Marengo Orsini |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático |