Articles | Volume 19, issue 10
https://doi.org/10.5194/cp-19-1975-2023
https://doi.org/10.5194/cp-19-1975-2023
Research article
 | 
17 Oct 2023
Research article |  | 17 Oct 2023

Spatiotemporal Intertropical Convergence Zone dynamics during the last 3 millennia in northeastern Brazil and related impacts in modern human history

Giselle Utida, Francisco W. Cruz, Mathias Vuille, Angela Ampuero, Valdir F. Novello, Jelena Maksic, Gilvan Sampaio, Hai Cheng, Haiwei Zhang, Fabio Ramos Dias de Andrade, and R. Lawrence Edwards

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Cited articles

Alvalá, R. C. S., Cunha, A. P. M. A., Briton, S. S. B., Seluchi, M. E., Marengo, J. A., Moraes, O. L. L., and Carvalho, M. A.: Drought monitoring in the Brazilian Semiarid region, An. Acad. Bras. Ciênc., 91, e20170209, https://doi.org/10.1590/0001-3765201720170209, 2019. 
Alves, J.: História das secas (séculos XVII a XIX), Edição fac-símile, Fundação Waldemar Alcântara, Fortaleza, https://www.fwa.org.br/livros/historia-das-secas.pdf (last access: 7 October 2023), 2003. 
ANA – Agência Nacional de Águas: Sistema Nacional de Informações sobre Recursos Hídricos, http://www.snirh.gov.br/hidroweb/apresentacao (last access: 1 February 2022), 2013. 
Andreoli, R. F. S., de Souza, R. A. F., Kayano, M. T., and Candido, L. A.: Seasonal anomalous rainfall in the central and eastern Amazon and associated anomalous oceanic and atmospheric patterns, Int. J. Climatol., 32, 1193–1205, https://doi.org/10.1002/joc.2345, 2011. 
Apaéstegui, J., Cruz, F. W., Vuille, M., Fohlmeister, J., Espinoza, J. C., Sifeddine, A., Strikis, N., Guyot, J. L., Ventura, R., Cheng, H., and Edwards, R. E.: Precipitation changes over the eastern Bolivian Andes inferred from speleothem (δ18O) records for the last 1400 years, Earth Planet. Sci. Lett., 494, 124–134, https://doi.org/10.1016/j.epsl.2018.04.048, 2018. 
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We reconstruct the Intertropical Convergence Zone (ITCZ) behavior during the past 3000 years over northeastern Brazil based on oxygen stable isotopes of stalagmites. Paleoclimate changes were mainly forced by the tropical South Atlantic and tropical Pacific sea surface temperature variability. We describe an ITCZ zonal behavior active around 1100 CE and the period from 1500 to 1750 CE. The dataset also records historical droughts that affected modern human population in this area of Brazil.