Variability of Summer Monsoon System over the Central-West Brazil during Holocene, based on paleoclimate records from speleothems.

• Grant number: 09/12902-3
• Support Opportunities: Scholarships in Brazil - Master
• Effective date (Start): March 01, 2010
• Effective date (End): February 29, 2012
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Francisco William da Cruz Junior
• Grantee: Marcos Saito de Paula
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 06/06761-0 - Late quaternary paleoclimate in Brazil from oxygen and carbon isotope ratios on speleothems, AP.JP

Abstract

This research proposal aims to investigate the paleoclimate changes occurred in the last 10 thousand years during the Holocene over states of Goiás, Mato Grosso and Mato Grosso do Sul. The study is based on high-resolution records of oxygen and carbon isotope ratios from speleothems, and also includes measurements of layer thickness and frequency within the same samples, which can be precisely dated by U/Th method.The research will focus on the study of high frequency climatic cycles interpreted from isotopic composition and microstratigraphic features of speleothems, with the use of time-series statistical analysis. The records from different cave site locations in Western Brazil will allow comparisons of the intensity and variability of the rainfall associated with South-American Summer monsoon System (SASM) in a regional scale. It might be possible to make link with climatic features originated in Atlantic or Pacific oceans such as El Niño-Southern Oscilation (ENSO), North Atlantic Oscilation (NAO) e Pacific Multidecadal Oscilation (PDO) with the rainfall that propagate from Amazon Basin to surrounding areas. Furthermore, we intend to discuss the effect of some highly discussed events such Medieval Climate Anomaly and Little Ice Age on the precipitation related to SASM in Brazil. This study already has available a significant number of U/Th ages that will make possible to constrain the chronology of the speleothem stable isotope records. The project is part of a scientific cooperation with researchers from United States and France that is supported by FAPESP (Grant Numbers 2006/06761-0 and 2006/0283402).

Scientific publications

(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)

NOVELLO, VALDIR F.; VUILLE, MATHIAS; CRUZ, FRANCISCO W.; STRKIS, NICOLAS M.; DE PAULA, MARCOS SAITO; EDWARDS, R. LAWRENCE; CHENG, HAI; KARMANN, IVO; JAQUETO, PLNIO F.; TRINDADE, RICARDO I. F.; et al. Centennial-scale solar forcing of the South American Monsoon System recorded in stalagmites. SCIENTIFIC REPORTS, v. 6, APR 21 2016. (14/10095-1, 12/03942-4, 15/08351-2, 12/01187-4, 12/50260-6, 09/12902-3)

NOVELLO, VALDIR F.; CRUZ, FRANCISCO W.; VUILLE, MATHIAS; STRIKIS, NICOLAS M.; EDWARDS, R. LAWRENCE; CHENG, HAI; EMERICK, SUELLYN; DE PAULA, MARCOS S.; LI, XIANGLEI; BARRETO, ELINE DE S.; et al. A high-resolution history of the South American Monsoon from Last Glacial Maximum to the Holocene. SCIENTIFIC REPORTS, v. 7, MAR 10 2017. (12/03942-4, 16/15807-5, 14/10095-1, 15/08351-2, 09/12902-3, 12/50260-6, 16/00299-4, 12/01187-4)

NOVELLO, V. F.; CRUZ, F. W.; MOQUET, J. S.; VUILLE, M.; DE PAULA, M. S.; NUNES, D.; EDWARDS, R. L.; CHENG, H.; KARMANN, I.; UTIDA, G.; et al. Two Millennia of South Atlantic Convergence Zone Variability Reconstructed From Isotopic Proxies. Geophysical Research Letters, v. 45, n. 10, p. 5045-5051, MAY 28 2018. (17/50085-3, 16/15807-5, 14/10095-1, 12/03942-4, 15/08351-2, 12/01187-4, 16/00299-4, 17/23687-2, 12/50260-6, 09/12902-3)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

PAULA, Marcos Saito de. Variabilidade do sistema de monções de verão durante os últimos 1500 anos na região de Bonito-MS com base em registros paleoclimáticos de espeleotemas. 2012. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Geociências (IG/BT) São Paulo.