δ¹³C and ⁸⁷Sr/⁸⁶Sr stalagmite records from Northeastern Brazil

Changes in insolation driven by precession and obliquity are considered the major driver of tropical precipitation on orbital time scales, and responsible for vegetation and physical landscape changes during the Late Holocene over tropical South America and these changes are recorded in speleothems from Northeastern Brazil (NEB). We investigated the environmental changes in the last 26 ky in the karst region of Chapada do Apodi - NEB, and present here the results of carbon (δ13C) and strontium (87Sr/86Sr) isotopes obtained in five speleothems from caves Trapiá, Rainha, Abissal and Furna Nova. This approach reveals that the balance between soil formation and erosion and their alternating impact on vegetation and precipitation changes occurred in response to variations in the position and intensity of the Intertropical Convergence Zone over the region. The data also reveals the beginning of the Meghalayan chronozone in NEB, characterized as the aridification of this region, decline in soil production, drying out of underground drainages, and increased dominance of dry-adapted flora species, characteristic of a more open vegetation (caatinga).

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Cite this as

Utida, Giselle, Cruz, Francisco William, Santos, Roberto Ventura, Sawakuchi, André Oliveira, Wang, Hong, Pessenda, Luiz C R, Novello, Valdir Felipe, Vuille, Mathias, Strauss, André M, Borella, Ana Claudia, Stríkis, Nicolás Misailidis, Guedes, Carlos C, De Andrade, Fábio Ramos Dias, Zhang, Haiwei, Cheng, Hai, Edwards, R Lawrence (2021). Dataset: δ¹³C and ⁸⁷Sr/⁸⁶Sr stalagmite records from Northeastern Brazil. https://doi.org/10.1594/PANGAEA.928049

DOI retrieved: 2021

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-4.0
Source https://doi.org/10.1594/PANGAEA.928049
Author Utida, Giselle
Given Name Giselle
Family Name Utida
More Authors
Cruz, Francisco William
Santos, Roberto Ventura
Sawakuchi, André Oliveira
Wang, Hong
Pessenda, Luiz C R
Novello, Valdir Felipe
Vuille, Mathias
Strauss, André M
Borella, Ana Claudia
Stríkis, Nicolás Misailidis
Guedes, Carlos C
De Andrade, Fábio Ramos Dias
Zhang, Haiwei
Cheng, Hai
Edwards, R Lawrence
Source Creation 2021
Publication Year 2021
Resource Type application/zip - filename: Utida-etal_2020
Subject Areas
Name: LandSurface

Name: Lithosphere

Related Identifiers
Title: Climate changes in Northeastern Brazil from deglacial to Meghalayan periods and related environmental impacts
Identifier: https://doi.org/10.1016/j.quascirev.2020.106655
Type: DOI
Relation: References
Year: 2020
Source: Quaternary Science Reviews
Authors: Utida Giselle , Cruz Francisco William , Santos Roberto Ventura , Sawakuchi André Oliveira , Wang Hong , Pessenda Luiz C R , Novello Valdir Felipe , Vuille Mathias , Strauss André M , Borella Ana Claudia , Stríkis Nicolás Misailidis , Guedes Carlos C , De Andrade Fábio Ramos Dias , Zhang Haiwei , Cheng Hai , Edwards R Lawrence .