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The Santos Bifurcation: present and past

Grant number: 20/14356-5
Support Opportunities:Research Program on Global Climate Change - Thematic Grants
Duration: March 01, 2022 - February 28, 2027
Field of knowledge:Physical Sciences and Mathematics - Oceanography - Geological Oceanography
Principal Investigator:Michel Michaelovitch de Mahiques
Grantee:Michel Michaelovitch de Mahiques
Host Institution: Instituto Oceanográfico (IO). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Pesquisadores principais:
Ilana Elazari Klein Coaracy Wainer ; Rubens Cesar Lopes Figueira
Associated researchers:César Barbedo Rocha ; Cesar de Castro Martins ; Luis Americo Conti ; Luiz Antonio Pereira de Souza ; Márcia Caruso Bícego ; Rafael Andre Lourenço ; Renata Hanae Nagai ; Silvia Helena de Mello e Sousa
Associated grant(s):22/02865-8 - Multi-user equipment approved in grant 20/14356-5: Laser granulometer, AP.EMU
22/02867-0 - Multi-User equipment approved in grant 20/14356-5 ICP-MS, AP.EMU
Associated scholarship(s):23/05107-0 - Continental slope morphology in the Santos Bifurcation area of influence, BP.MS
23/05036-5 - Geochemical signatures of sediments in the Santos Bifurcation region: a paleoceanographic reconstruction, BP.TT
23/05207-4 - Radiomatric and grain-size analyses in the geological record of the Santos Bifurcation region, BP.TT
+ associated scholarships 22/13955-8 - Distribution of the natural radioactive elements in cores of the santos Bifurcation (South Atlantic), BP.IC
22/09631-2 - Analysis of grain-size populations and estimates of paleocurrents associated with the flow of the Antarctic intermediate water, on the slope of Santos Basin, BP.IC
21/04984-1 - Paleoceanographic evolution of the Western South Atlantic Ocean circulation: a hotspot of evidence for global climate changes, BP.PD - associated scholarships


Studies on the geological record of the Antarctic Intermediate Water in the Southwest Atlantic are quite scarce, despite its fundamental role in the southern circulation. This water mass, transported by the Subtropical Gyre, undergoes a bifurcation when reaching the South Atlantic's west margin, forming the Santos Bifurcation.In this project, we propose to study the Santos Bifurcation at different time scales, in an interdisciplinary approach, which involves its spatial variability over tens to thousands of years. When studying the Bifurcation variability, the authors understand that it is possible to recognize the Antarctic Intermediate Water's variability. The methodological approach involves everything from current velocity measurements to paleoceanographic analyzes involving the study of cores and large-scale modeling. The project involves researchers from three institutes in São Paulo, one from Paraná and one from the United States. (AU)

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