SAGA: The South Atlantic Gateway in the global conveyor belt

SAGA-Gyre will focus on calculating the geostrophic interior fluxes and its seasonal, and quantifying the time variation of the flow within the thermocline gyres, intermediate layers and deep waters.

This subproject will be responsible for the energy dissipation calculations in boundary regions and the interior ocean during the SAGA-10W and SAGA-34.5S cruises. Also, biogeochemical measures will carry out during these cruises.

SAGA-Scale will explore the flow at the mesoscale, regional and ocean-gyre scales, and their interactions and the energy dissipation calculations during SAGA1 and SAGA2 cruises: recirculation of subantarctic waters along and under the subantarctic front, dynamics of western boundary retroflections (in the Brazil-Malvinas Confluence and western equatorial regions), the intrusion of the Indian Ocean waters through Agulhas rings and filaments associated with the Benguela Current and eastern boundary upwelling, eddy pathways south and north of the subantarctic and subtropical fronts, and the westward ring motions.

SAGA-ZONAL will focus on the zonal jets in thermocline, intermediate and deep waters of the South Atlantic Ocean.

This includes the analysis of the velocity data gathered through the instrumented moorings and its comparison and integration with the data obtained from the PIES. These results will be compared with surface and subsurface Argo float, altimetry and numerical reanalysis data.