The South Atlantic on a 2°C warmer planet

• Grant number: 22/06452-0
• Support Opportunities: Generation Project Research Grant
• Start date: March 01, 2023
• End date: February 29, 2028
• Field of knowledge: Physical Sciences and Mathematics - Geosciences
• Principal Investigator: Marília de Carvalho Campos Garcia
• Grantee: Marília de Carvalho Campos Garcia
• Host Institution: Instituto de Geociências (IG). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated researchers: Alexander Piotrowski ; Ana Luiza Spadano Albuquerque ; André Bahr ; André Oliveira Sawakuchi ; Bruna Borba Dias ; Cristiano Mazur Chiessi ; Douglas Galante ; Gelvam André Hartmann ; Karen Badaraco Costa ; Luciana Figueiredo Prado ; Ricardo Ivan Ferreira da Trindade ; Stefan Mulitza ; Vinícius Ribau Mendes
• Associated scholarship(s): 24/14342-5 - Reconstruction of changes in the South Atlantic Subtropical Gyre during Termination V and the MIS11: a multi-proxy approach, BP.MS; 24/10873-6 - The planktonic foraminiferal luminescence potential for reconstructing sea surface temperature: proxy development, BP.MS; 24/11054-9 - Changes in the sea surface temperatures during MIS 11 and Termination V, BP.DR; 24/00180-3 - Changes in sea surface salinity in the South Atlantic during MIS 11 and Termination V, BP.MS; 23/05764-0 - The South Atlantic on a 2°C warmer planet, BP.GR

Abstract

The scientifically and politically agreed-upon benchmark for global warming limits in coming decades (stated in the Paris Agreement) was set to "well below 2°C above preindustrial levels". The interglacial period called Marine Isotope Stage (MIS) 11 that occurred between 426 and 396 thousand years ago reached up to 2°C warmer than preindustrial temperatures, making it an excellent case study to investigate the behavior of Earth's climate under such warmer-than-preindustrial conditions. The South Atlantic is particularly important for Earth's climate since it is an enormous heat reservoir and plays a crucial role in the heat transport between both hemispheres. However, the lack of paleoceanographic records hampers the investigation of the behavior of South Atlantic during MIS 11 and its preceding termination (Termination V). Here, a combination of proxies will be applied for the first time in six South Atlantic marine sediment cores in order to produce a detailed reconstruction of South Atlantic surface and deep-water conditions across MIS 11 and Termination V. Additionally, we also propose to work on the development of a new proxy for sea surface temperature based on the foraminiferal luminescence signals with great potential of producing significant advances in paleoceanography. The outcomes of this research proposal will greatly improve our understanding on the South Atlantic role under a 2°C warmer-than-preindustrial climate, helping to constrain possible future scenarios. This proposal will also nucleate a new high-level research group at the Institute of Geosciences of the University of Campinas (IG/UNICAMP) focused on paleoclimate change from an oceanic perspective. A short video presenting this research proposal can be found in APPENDIX 1. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

NASCIMENTO, R. A.; JOHNSTONE, H. J. H.; KUHNERT, H.; VENANCIO, I. M.; CHIESSI, C. M.; BALLALAI, J. M.; CAMPOS, M. C.; GOVIN, A.; MULITZA, S.; ALBUQUERQUE, A. L. S.. Long-term variability of the western tropical Atlantic sea surface temperature driven by greenhouse gases and AMOC. QUATERNARY SCIENCE REVIEWS, v. 322, p. 13-pg., 2023-11-20. (22/09479-6, 19/25179-0, 22/06452-0, 19/24349-9, 18/15123-4)

KRAFT, LAURA; CAMPOS, MARILIA C.; NASCIMENTO, RODRIGO A.; DIAS, BRUNA B.; CRIVELLARI, STEFANO; KOCHHANN, MARCUS V. L.; BERTASSOLI JR, DAILSON J.; VENANCIO, IGOR M.; SANTOS, THIAGO P.; BAKER, PAUL A.; et al. AMOC-forced southward migration of the ITCZ under a warm climate background. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, v. 661, p. 10-pg., 2025-01-16. (19/25179-0, 22/06440-1, 22/06452-0, 22/09822-2, 18/15123-4, 20/11452-3, 19/24349-9, 22/01056-9, 21/02877-3, 19/24977-0, 23/14028-6, 22/09479-6)

DIAS, B. B.; CHIESSI, C. M.; PIOTROWSKI, A. M.; CAMPOS, M. C.; JENA, P. S.; BALLALAI, J. M.; NASCIMENTO, R. A.; SANTOS, T. P.; VENANCIO, I. M.; MASHAYEK, A.; et al. Reduced Penetration of Northern-Sourced Waters Into the South Atlantic During the Last Interglacial Relative to the Holocene. PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY, v. 40, n. 2, p. 15-pg., 2025-02-01. (19/25179-0, 22/06452-0, 18/15123-4, 20/11452-3, 19/24349-9, 22/01056-9, 23/00355-5, 22/09479-6)

CAMPOS, MARILIA C.; CHIESSI, CRISTIANO M.; NASCIMENTO, RODRIGO A.; KRAFT, LAURA; RADIONOVSKAYA, SVETLANA; SKINNER, LUKE; DIAS, BRUNA B.; PINHO, TAINA M. L.; KOCHHANN, MARCUS V. L.; CRIVELLARI, STEFANO; et al. Millennial- to centennial-scale Atlantic ITCZ swings during the penultimate deglaciation. QUATERNARY SCIENCE REVIEWS, v. 348, p. 12-pg., 2024-11-30. (19/25179-0, 22/06452-0, 23/05764-0, 18/23899-2, 18/15123-4, 20/11452-3, 22/02957-0, 19/24349-9, 22/01056-9, 21/02877-3, 22/09822-2, 22/09479-6)