Advanced search
Start date
Betweenand

Past perspectives on tipping elements of the climate system: the Amazon Rainforest and the Atlantic Meridional Overturning Circulation (PPTEAM)

Grant number: 18/15123-4
Support type:Research Grants - Research Program on Global Climate Change - Young Investigators - Phase 2
Duration: May 01, 2019 - April 30, 2024
Field of knowledge:Physical Sciences and Mathematics - Oceanography
Principal Investigator:Cristiano Mazur Chiessi
Grantee:Cristiano Mazur Chiessi
Home Institution: Escola de Artes, Ciências e Humanidades (EACH). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Assoc. researchers: Alan Cavalcanti da Cunha ; Ana Luiza Spadano Albuquerque ; André Oliveira Sawakuchi ; Fabiano Do Nascimento Pupim ; Francisco William da Cruz Junior ; Gilvan Sampaio de Oliveira ; Ingo Daniel Wahnfried ; Paulo Eduardo de Oliveira ; Renato Paes de Almeida ; Tatiana da Silva Pereira ; Vinícius Ribau Mendes ; Wânia Duleba
Associated research grant:12/17517-3 - Response of the Western Atlantic Ocean to changes in the Atlantic meridional overturning circulation: from millennial to seasonal variability, AP.PFPMCG.JP
Associated scholarship(s):19/19948-0 - Influence of Late Pleistocene climate changes on the Amazon vegetation, BP.DR
19/24977-0 - Environmental signals recorded in modern sediments of tropical South American rivers, BP.PD
19/10642-6 - Response of the upper water column at the origin of the Brazil Current to slowdown events of the Atlantic meridional ocean circulation during the last 80 ka, BP.MS

Abstract

Negative synergies between climate change and deforestation may force the Amazon rainforest to cross a tipping point, resulting in large-scale substitution of rainforest by non-forest ecosystems. However, this possible dieback of the Amazon rainforest remains highly uncertain at least in part due to another similarly uncertain tipping element of the climate system, namely the Atlantic meridional overturning circulation. A potential shutdown of the Atlantic meridional overturning circulation would cause major changes in surface heat distribution in the Atlantic Ocean, strongly affecting Amazonian precipitation. Indeed, such changes have been repeatedly recorded in geological archives. Here we propose to reconstruct past climate and environmental changes in Amazonia and the adjacent ocean for the last ca. 250 kyr in unprecedented temporal resolution, grounded in a comprehensive calibration of paleoenvironmental proxies. Therefore, we will analyze geochemical, isotopic and biological parameters in (i) modern tropical South American fluvial sediments to calibrate paleoclimatic and paleoenvironmental proxies, and (ii) western tropical Atlantic marine sediment cores to reconstruct past climate and environmental conditions. This project will provide an in-depth understanding of the responses and internal feedbacks of Amazonia and the western tropical Atlantic for (i) abrupt climate changes, (ii) warmer than preindustrial climates, and (iii) environmental boundary conditions significantly different from preindustrial, helping to constrain possible future scenarios for Amazonia and the adjacent ocean. Also, this project will consolidate a top-level research group on paleoceanography and paleoclimatology at EACH/USP. (AU)

Articles published in Agência FAPESP Newsletter about the research grant
A novel method for analyzing marine sediments contributes to paleoclimate reconstitution 
Articles published in other media outlets (19 total):
More itemsLess items
Un nuevo método de estudio de sedimentos marinos ayuda a reconstituir el paleoclima 
Un nuevo método de estudio de sedimentos marinos ayuda a reconstituir el paleoclima 
Un nuevo método de estudio de sedimentos marinos ayuda a reconstituir el paleoclima 
A novel method for analyzing marine sediments contributes to paleoclimate reconstitution | PHARMA JOBS 
A novel method for analyzing marine sediments contributes to paleoclimate reconstitution | PHARMA JOBS 
A novel method for analyzing marine sediments contributes to paleoclimate reconstitution | PHARMA JOBS 
A novel method for analyzing marine sediments contributes to paleoclimate reconstitution 
A novel method for analyzing marine sediments contributes to paleoclimate reconstitution | PHARMA JOBS 
A novel method for analyzing marine sediments contributes to paleoclimate reconstitution 
A Novel Method for Analyzing Marine Sediments Contributes to Paleoclimate Reconstitution 
Novo método de análise de sedimentos marinhos contribui para reconstituição do paleoclima 
Novo método de análise de sedimentos marinhos contribui para reconstituição do paleoclima 
Pesquisa: Novo método de análise de sedimentos marinhos contribui para reconstituição do paleoclima 
Pesquisa analisa sedimentos coletados na costa do Nordeste 
Pesquisa analisa sedimentos coletados na costa do Nordeste 
Novo método de análise de sedimentos marinhos contribui para reconstituição do paleoclima 
Novo método de análise de sedimentos marinhos contribui para reconstituição do paleoclima 
Novo método de análise de sedimentos marinhos contribui para reconstituição do paleoclima 
Novo método de análise de sedimentos marinhos contribui para reconstituição do paleoclima 

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)
VENANCIO, I. M.; SHIMIZU, M. H.; SANTOS, T. P.; LESSA, D. O.; PORTILHO-RAMOS, R. C.; CHIESSI, C. M.; CRIVELLARI, S.; MULITZA, S.; KUHNERT, H.; TIEDEMANN, R.; VAHLENKAMP, M.; BICKERT, T.; SAMPAIO, G.; ALBUQUERQUE, A. L. S.; VEIGA, S.; NOBRE, P.; NOBRE, C. Changes in surface hydrography at the western tropical Atlantic during the Younger Dryas. GLOBAL AND PLANETARY CHANGE, v. 184, JAN 2020. Web of Science Citations: 0.
CAMPOS, MARILIA C.; CHIESSI, CRISTIANO M.; PRANGE, MATTHIAS; MULITZA, STEFAN; KUHNERT, HENNING; PAUL, ANDRE; VENANCIO, IGOR M.; ALBUQUERQUE, ANA LUIZA S.; CRUZ, FRANCISCO W.; BAHR, ANDRE. A new mechanism for millennial scale positive precipitation anomalies over tropical South America. QUATERNARY SCIENCE REVIEWS, v. 225, DEC 1 2019. Web of Science Citations: 0.
BALLALAI, JOAO M.; SANTOS, THIAGO P.; LESSA, DOUGLAS O.; VENANCIO, IGOR M.; CHIESSI, CRISTIANO M.; JOHNSTONE, HEATHER J. H.; KUHNERT, HENNING; CLAUDIO, MARCELA R.; TOLEDO, FELIPE; COSTA, KAREN B.; ALBUQUERQUE, ANA LUIZA S. Tracking Spread of the Agulhas Leakage Into the Western South Atlantic and Its Northward Transmission During the Last Interglacial. PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY, NOV 2019. Web of Science Citations: 0.
MENDES, VINICIUS R.; SAWAKUCHI, ANDRE O.; CHIESSI, CRISTIANO M.; GIANNINI, PAULO C. F.; REHFELD, KIRA; MULITZA, STEFAN. Thermoluminescence and Optically Stimulated Luminescence Measured in Marine Sediments Indicate Precipitation Changes Over Northeastern Brazil. PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY, v. 34, n. 8, p. 1476-1486, AUG 2019. Web of Science Citations: 1.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.