A calibration study in Central Brazil caves: implications for the paleoclimate inferences from speleothem records

• Grant number: 12/01187-4
• Support Opportunities: Regular Research Grants
• Start date: May 01, 2012
• End date: April 30, 2014
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Ivo Karmann
• Grantee: Ivo Karmann
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The research proposed aims to set up a monitoring program for environmental parameters such as climate, hydrology and chemistry-isotopic composition of meteoric waters at cave sites in order to improve the confidence in the paleoclimatic and paleoenvironmental interpretations records from speleothem records. The study sites were previously selected based on the availability of well-dated speleothems that will provide high-resolution paleoclimate reconstructions of the rainfall distributions along the South Atlantic Convergence Zone, a major feature of South American Monsoon System.This study will make possible a precise evaluation of the "amount effect" in the isotope fractionation of rainfall water that percolates into the karstic system and also the primary control of climate and hydrology on chemistry and isotopic composition of drip waters forming modern speleothems. This research project is associated with ongoing studies of the precipitation variability in the South American Monsoon system on decadal to multicentannial timescales during the Holocene. (AU)

Scientific publications

(6)

(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, 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)

JAQUETO, PLINIO; TRINDADE, RICARDO I. F.; HARTMANN, GELVAM A.; NOVELLO, VALDIR F.; CRUZ, FRANCISCO W.; KARMANN, IVO; STRAUSS, BECKY E.; FEINBERG, JOSHUA M.. Linking speleothem and soil magnetism in the Pau d'Alho cave (central South America). JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, v. 121, n. 10, p. 7024-7039, OCT 2016. (12/01187-4, 12/50260-6, 12/03942-4)

STRIKIS, NICOLAS M.; CHIESSI, CRISTIANO M.; CRUZ, FRANCISCO W.; VUILLE, MATHIAS; CHENG, HAI; DE SOUZA BARRETO, ELINE A.; MOLLENHAUER, GESINE; KASTEN, SABINE; KARMANN, IVO; EDWARDS, R. LAWRENCE; et al. Timing and structure of Mega-SACZ events during Heinrich Stadial 1. Geophysical Research Letters, v. 42, n. 13, p. 5477-5484, JUL 16 2015. (12/17517-3, 12/01187-4, 12/50260-6)

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)

STRIKIS, NICOLAS M.; CRUZ, FRANCISCO W.; BARRETO, ELINE A. S.; NAUGHTON, FILIPA; VUILLE, MATHIAS; CHENG, HAI; VOELKER, ANTJE H. L.; ZHANG, HAIWEI; KARMANN, IVO; EDWARDS, R. LAWRENCE; et al. South American monsoon response to iceberg discharge in the North Atlantic. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v. 115, n. 15, p. 3788-3793, APR 10 2018. (16/00299-4, 12/01187-4, 12/50260-6)