| Texto completo | |
| Autor(es): |
Marcello, Fernanda
;
Tonelli, Marcos
;
Ferrero, Bruno
;
Wainer, Ilana
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | COMMUNICATIONS EARTH & ENVIRONMENT; v. 4, n. 1, p. 15-pg., 2023-03-24. |
| Resumo | |
The upper limb of the Atlantic meridional overturning circulation brings shallow interocean contributions to replenish the North Atlantic export of deepwaters. It is primarily formed in the southern South Atlantic where the converging entrainment of Pacific and Indian Ocean waters meet and incorporate into the South Atlantic subtropical gyre. Here, we use Community Earth System Model 1 Large Ensemble simulation results along 1920-2100 to investigate the response of the Atlantic meridional overturning circulation upper limb and the South Atlantic subtropical gyre to future human-induced climate warming under business-as-usual greenhouse gas emissions. In terms of flow redistribution, we find that the Atlantic meridional overturning circulation upper limb weakens not because less waters are being imported from the Pacific and Indian basins - but because waters are being mostly directed to recirculate in the southwestern portion of a distorted South Atlantic subtropical gyre, turning back southward after reaching the South Atlantic western boundary. Large ensemble simulations project an intensification of the South Atlantic subtropical gyre with reduced water supply to the North Atlantic due to a weakening of the Atlantic meridional overturning circulation and changes in atmospheric forcing. (AU) | |
| Processo FAPESP: | 19/08247-1 - Relação do oceano Atlântico Tropical com a seca da Amazonia e florescimento da região do Sahara no Holoceno médio |
| Beneficiário: | Ilana Elazari Klein Coaracy Wainer |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 17/16511-5 - A circulação de revolvimento meridional do Atlântico Sul do passado para o futuro: caminhos e variabilidade de baixa frequência |
| Beneficiário: | Fernanda Marcello de Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 21/04984-1 - Evolução paleoceanográfica da circulação da porção Oeste do Oceano Atlântico Sul: um ponto crucial de evidências para mudanças climáticas globais |
| Beneficiário: | Fernanda Marcello de Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |