Investigating delta C-13 values in stalagmites from tropical South America for the last two millennia

Autor(es):Mostrar menos -

Novello, Valdir Felipe ^[1] ; da Cruz, Francisco William ^[1] ; Vuille, Mathias ^[2] ; Pereira Silveira Campos, Jose Leandro ^[1] ; Strikis, Nicolas Misailidis ^[3] ; Apaestegui, James ^[4] ; Moquet, Jean Sebastien ^[5] ; Azevedo, Vitor ^[1] ; Ampuero, Angela ^[1] ; Utida, Giselle ^[1] ; Wang, Xianfeng ^{[6, 7]} ; Paula-Santos, Gustavo Macedo ^[8] ; Jaqueto, Plinio ^[9] ; Ruiz Pessenda, Luiz Carlos ^[10] ; Breecker, Daniel O. ^[11] ; Karmann, Ivo ^[1]

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^[1] Univ Sao Paulo, Inst Geosci, BR-05508080 Sao Paulo - Brazil

^[2] SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 - USA

^[3] Univ Fed Fluminense, Dept Geoquim, BR-24020141 Niteroi, RJ - Brazil

^[4] Inst Geofis Peru, Lima 15012 - Peru

^[5] Inst Sci Terre Orleans, F-45100 Orleans - France

^[6] Nanyang Technol Univ, Earth Observ Singapore, Singapore 639798 - Singapore

^[7] Nanyang Technol Univ, Asian Sch Environm, Singapore 639798 - Singapore

^[8] Univ Estadual Campinas, Inst Geosci, BR-13083855 Campinas, SP - Brazil

^[9] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo - Brazil

^[10] Univ Sao Paulo, Ctr Nucl Energy Agr CENA, BR-13416000 Sao Paulo - Brazil

^[11] Univ Texas Austin, Jackson Sch Geosci, Austin, TX 78712 - USA

• Tipo de documento: Artigo Científico
• Fonte: QUATERNARY SCIENCE REVIEWS; v. 255, MAR 1 2021.
• Citações Web of Science: 0

Resumo

Due to the many factors controlling delta C-13 values in stalagmites, complicating their paleoclimatic and paleoenvironmental interpretation, most studies do not present delta C-13 values, but instead focus mainly on delta O-18 values. This is also the case for most cave studies from tropical South America, where many new delta O-18 stalagmite records covering the last millennia were recently published. Here, we review the delta C-13 values in stalagmites, investigating the influence on this proxy of local hydroclimate, altitude, temperature and vegetation types, by employing a new dataset composed of published and unpublished carbon isotope records from various sites in tropical South America. The main factors influencing delta C-13 values are associated with the local hydroclimate, followed by minor effects from temperature. Most of the isotopic records show a significant correlation between the delta C-13 and delta O-18 values, indicating a close relationship between local hydroclimate and atmospheric convective processes related to the South American Monsoon System. (C) 2021 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 16/15807-5 - Reconstituição paleoclimática e paleoambiental do último período glacial no centro-oeste brasileiro
• Beneficiário: Valdir Felipe Novello
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/50085-3 - PIRE: educação e pesquisa em clima das Américas usando os exemplos de anéis de árvores e espeleotemas (PIRE-CREATE)
• Beneficiário: Francisco William da Cruz Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/07794-9 - Povos indígenas e o meio ambiente na Amazônia Antiga
• Beneficiário: Eduardo Góes Neves
• Modalidade de apoio: Auxílio à Pesquisa - Temático