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Saga proyect

SAGA: The South Atlantic Gateway in the global conveyor belt

Consortium
  • Istituto de Oceanografía y Cambio Global – IOCAG (ULPGC)

  • Institut de Ciències del Mar - ICM (CSIC)

  • Insituto Español de Oceanografía - IEO

  • Centro de Investigación Científica y Educación Superior de Ensenada – CICESE (México)

Period
2019 – 2021

The general objective of the SAGA project is to quantify and monitor the returning limb of the Atlantic Meridional Overturning Circulation in the South Atlantic Ocean, with special attention to the interior-ocean zonal flows linking the eastern and western South Atlantic basins.

SAGA-Gyre

Gyre recirculation and intergyre transfer in the South Atlantic Ocean

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.

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SAGA-Scale

Fluxes of properties at multiple scales in the South Atlantic Ocean

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.

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SAGA-Zonal

Zonal flows in the interior South Atlantic Ocean

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.

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Timeline
August 19

Resolution of Plan Nacional Grant

December 19

Anchors definition for Cruise SAGA 1

August'20

PIES acquisition for Cruise SAGA 9W

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October'20

-Personnel and technical resources planification for Cruises SAGA 34.5S and 9W

-Application for work in national waters (Brazil and South Africa)

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October'20

-Calculations to define the final PIES ubications

-Calculation of PIES observations error

February'21

Cruise SAGA 10ºW (9ºW)

Researchers have arrived to Punta Arenas

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March'21

SAGA 10W Cruise starts from Punta Arenas to Las Palmas

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Re-planning

Cruise SAGA 1

Río de Janeiro - Dakar

B.O. Hespérides

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Re-planning

Cruise SAGA 35,5ºS

Cape Town-Punta Arenas

B.O. Sarmiento de Gamboa

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Financian
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Financian Gobierno