Penultimate glacial-to-interglacial transition in Northeastern South America and the adjacent ocean

• Grant number: 19/25179-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Effective date (Start): June 01, 2020
• Effective date (End): February 28, 2023
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: André Oliveira Sawakuchi
• Grantee: Marília de Carvalho Campos Garcia
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 18/15123-4 - Past perspectives on tipping elements of the climate system: the Amazon Rainforest and the Atlantic Meridional Overturning Circulation (PPTEAM), AP.PFPMCG.JP2
• Associated scholarship(s): 22/09479-6 - Changes in ITCZ-related precipitation over NE South America during the penultimate glacial-to-interglacial transition: assessing fluvial discharge via planktonic foraminiferal Ba/Ca, BE.EP.PD

Abstract

The Atlantic Meridional Overturning Circulation (AMOC) plays a fundamental role in the oceanography and climate of the Atlantic realm. A potential shutdown of the AMOC would cause major changes in surface heat distribution in the Atlantic Ocean, strongly affecting tropical South American precipitation. Thus, a comprehensive understanding of the response of the Atlantic Ocean to changes in the AMOC intensity on different time scales is a key issue. Glacial-to-interglacial transitions are unique targets for past climate reconstructions not only because these periods were characterized by major changes in the strength of the AMOC, but also because of the marked changes in atmospheric carbon dioxide and sea level, with the associated impacts on continental hydroclimate. Here we propose to assess the impacts of the penultimate glacial-to-interglacial transition on Northeastern (NE) South America and the adjacent Western Equatorial Atlantic, in unprecedented temporal resolution. Through this research proposal, we expect to: (i) characterize the changes in NE South American hydroclimate, as well as determine the changes in the Western Equatorial Atlantic upper water column structure and bottom water ventilation during the penultimate glacial-to-interglacial transition; and (ii) subsidize the debate of possible impacts that future changes in AMOC may have over the NE South America and the adjacent Western Equatorial Atlantic. (AU)

Scientific publications

(5)

(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)

CAMPOS, MARILIA C.; CHIESSI, CRISTIANO M.; NOVELLO, VALDIR F.; CRIVELLARI, STEFANO; CAMPOS, JOSE L. P. S.; ALBUQUERQUE, ANA LUIZA S.; VENANCIO, IGOR M.; SANTOS, THIAGO P.; MELO, DAYANE B.; CRUZ, FRANCISCO W.; et al. South American precipitation dipole forced by interhemispheric temperature gradient. SCIENTIFIC REPORTS, v. 12, n. 1, p. 9-pg., 2022-06-22. (18/15123-4, 19/25179-0, 19/24349-9)

MEDINA, N. MELISSA M.; CRUZ, FRANCISCO W.; WINTER, AMOS; ZHANG, HAIWEI; AMPUERO, ANGELA; VUILLE, MATHIAS; MAYTA, VICTOR C.; CAMPOS, MARILIA C.; RAMIREZ, VERONICA MARCELA; UTIDA, GISELLE; et al. Atlantic ITCZ variability during the Holocene based on high-resolution speleothem isotope records from northern Venezuela. QUATERNARY SCIENCE REVIEWS, v. 307, p. 14-pg., 2023-04-05. (19/16745-1, 19/25179-0, 17/50085-3)

MARTINS, ALISSON K.; KOCHHANN, KARLOS G. D.; CHIESSI, CRISTIANO M.; BAUERSACHS, THORSTEN; ZARDIN, TAMIRES N.; CAMPOS, MARILIA C.; KRAHL, GUILHERME; DE SOUZA, LAIS V.; CRIVELLARI, STEFANO; BAHR, ANDRE; et al. Links between precipitation patterns over eastern tropical South America and productivity in the western tropical South Atlantic Ocean during the last deglacial. QUATERNARY INTERNATIONAL, v. 667, p. 12-pg., 2023-09-10. (20/06534-0, 18/15123-4, 19/24349-9, 16/10242-0, 18/06790-7, 22/09822-2, 19/25179-0)

PINHO, TAINA M. L.; CHIESSI, CRISTIANO M.; PORTILHO-RAMOS, RODRIGO C.; CAMPOS, MARILIA C.; CRIVELLARI, STEFANO; NASCIMENTO, RODRIGO A.; ALBUQUERQUE, ANA L. S.; BAHR, ANDRE; MULITZA, STEFAN. Meridional changes in the South Atlantic Subtropical Gyre during Heinrich Stadials. SCIENTIFIC REPORTS, v. 11, n. 1, MAY 3 2021. (18/15123-4, 19/25179-0, 19/24349-9, 16/10242-0, 19/10642-6)

SANTOS, THIAGO P.; SHIMIZU, MARILIA H.; NASCIMENTO, RODRIGO A.; VENANCIO, IGOR M.; CAMPOS, MARILIA C.; PORTILHO-RAMOS, RODRIGO C.; BALLALAI, JOAO M.; LESSA, DOUGLAS O.; CRIVELLARI, STEFANO; NAGAI, RENATA H.; et al. A data-model perspective on the Brazilian margin surface warming from the Last Glacial Maximum to the Holocene. QUATERNARY SCIENCE REVIEWS, v. 286, p. 14-pg., 2022-06-15. (20/06534-0, 18/15123-4, 16/10242-0, 19/24349-9, 19/25179-0)