O impacto do ENSO e do dipolo do Atlântico no nordeste do Brasil

A brief review of the El Niño/Southern Oscillation and Atlantic Dipole phenomena has been made with relation to their impacts on Brazil, especially in the northern North-east Brazil (NEB). Anomalies in rainfall are mainly caused by the SST variations in the tropical Atlantic and equatorial Pacific oceans. The atmospheric tropical response is shown as changes in the meridional (Hadley) and zonal circulation (Walker) with anomalous subsidence in the drought years and accelerated vertical motion during the years with excess rainfall. In the extra-tropical latitudes, blocking phenomenon associated with a train of Rossby waves from the Pacific changes the magnitude and trajectory of the jet streams in both hemispheres, also changing the trajectory and intensity of the cold front systems, leading to torrential rains with floods in Southeast and South of Brazil.