Expansion of the paleoclimate records of speleothems collected in the mid-west of Brazil

• Grant number: 17/23687-2
• Support type: Scholarships abroad - Research Internship - Post-doctor
• Effective date (Start): March 15, 2018
• Effective date (End): June 14, 2018
• Field of knowledge: Physical Sciences and Mathematics - Geosciences
• Principal Investigator: Francisco William da Cruz Junior
• Grantee: Valdir Felipe Novello
• Supervisor abroad: Hai Cheng
• Home Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Local de pesquisa : Xi'an University of Arts and Science, China
• Associated to the scholarship: 16/15807-5 - Paleoclimate and paleoenvironmental reconstructions over the last glacial period in the mid-west Brazil, BP.PD

Abstract

This project aims to reconstruct the paleoclimate of the last glacial and interglacial periods through assembly of proxies obtained on the study of speleothems collected in caves from Brazil. For it, will be used stalagmites previously dated with an isotopic record that cover the last ~33 thousand years in high resolution from mid-west Brazil, as well, unexplored samples from this and other regions of the country. Based on the construction of the new palaeoclimatic records, we aim to investigate the regional and temporal variability of climate and its relationship with the biodiversity and biogeography. Particular emphasis will be given, among others, to the response of summer monsoon to the climate forcing induced by both the summer insolation linked to the precessional cycle (19 to 23 thousand years) and the millennial-scale changes in ocean circulation (which have a mean duration of one to three thousand years), it includes the events: Dansgaard-Oeschers and Heinrichs. These forcing can change profoundly the climate conditions over the continents and oceans, due to large-scale changes in atmospheric circulation in South America and worldwide. (AU)

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.; CRUZ, FRANCISCO W.; MCGLUE, MICHAEL M.; WONG, CORINNE I.; WARD, BRITTANY M.; VUILLE, MATHIAS; SANTOS, RUDNEY A.; JAQUETO, PLINIO; PESSENDA, LUIZ C. R.; ATORRE, TIAGO; RIBEIRO, LIGIA M. A. L.; KARMANN, IVO; BARRETO, ELINE S.; CHENG, HAI; EDWARDS, R. LAWRENCE; PAULA, MARCOS S.; SCHOLZ, DENIS. Vegetation and environmental changes in tropical South America from the last glacial to the Holocene documented by multiple cave sediment proxies. Earth and Planetary Science Letters, v. 524, OCT 15 2019. Web of Science Citations: 0.

MACARIO, K. D.; STRIKIS, N. M.; CRUZ, F. W.; HAMMERSCHLAG, I; ALVE, E. Q.; NOVELLO, V. F.; EDWARDS, L.; CHENG, H.; ANDRADE, F. R. D.; BUARQUE, P. F. S. M.; GARBELIM, J. A. S. Assessing the dead carbon proportion of a modern speleothem from central Brazil. QUATERNARY GEOCHRONOLOGY, v. 52, p. 29-36, JUN 2019. Web of Science Citations: 0.

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.; STRIKIS, N. M.; CAMPOS, J. L. P. S. 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. Web of Science Citations: 10.