Occurrence and impact of the mega-South Atlantic Convergence Zone over the eastern...
| Grant number: | 18/06790-7 |
| Support type: | Scholarships abroad - Research Internship - Doctorate |
| Effective date (Start): | July 09, 2018 |
| Effective date (End): | January 03, 2019 |
| Field of knowledge: | Physical Sciences and Mathematics - Geosciences |
| Principal Investigator: | Cristiano Mazur Chiessi |
| Grantee: | Marília de Carvalho Campos |
| Supervisor abroad: | Stefan Mulitza |
| Home Institution: | Escola de Artes, Ciências e Humanidades (EACH). Universidade de São Paulo (USP). São Paulo , SP, Brazil |
| Local de pesquisa : | University of Bremen, Germany |
| Associated to the scholarship: | 16/10242-0 - Occurrence and impact of the mega-South Atlantic Convergence Zone over the eastern South America during the last glacial period: a paleoceanographic approach, BP.DR |
Abstract The western boundary currents of the South Atlantic play a fundamental role in the distribution of energy between the hemispheres. The Brazil Current (BC), for instance, stores and redirects towards the mean latitudes of the Southern Hemisphere a significant portion of heat during periods of a weak Atlantic Meridional Overturning Circulation. Additionally, the BC influences the South Atlantic Converge Zone (SACZ), which is responsible for summer precipitation in a large sector of South America. The SACZ is also a crucial source of precipitation to the São Francisco River drainage basin, the largest drainage basin in eastern South America (ESA), whose response to millennial-scale climate events is poorly known. The data so far obtained under the PhD project of the candidate are very promising and will most probably provide a significant improvement on our understanding of millennial-scale changes in the BC and in the climate of ESA. The requested research internship aims at reconstructing (i) the variability in sea-surface temperatures of the BC, and (ii) changes in precipitation over the São Francisco River drainage basin through pulses of terrigenous sediments around 10.5°S for the last glacial cycle based on Mg/Ca analyses in planktonic foraminiferal tests and X-ray fluorescence analyses in bulk sediment samples, respectively. Therefore, we will investigate marine sediment cores M125-95-2/3 collected at a site under the influence of the BC and subject to the delivery of terrigenous sediments from the São Francisco River drainage basin. | |