Abstract

Recent paleoclimatic studies suggest that changes in the tropical rainbelt across the Atlantic Ocean during the past two millennia are linked to a latitudinal shift of the Intertropical Convergence Zone (ITCZ) driven by the Northern Hemisphere (NH) climate. However, little is known regarding other potential drivers that can affect tropical Atlantic rainfall, mainly due to the scarcity of adequate and high-resolution records. In this study, we fill this gap by reconstructing precipitation changes in Northeastern Brazil during the last 2,300 years from a high-resolution lake record of hydrogen isotope compositions of plant waxes. We find that regional precipitation along the coastal area of South America was not solely governed by north-south displacements of the ITCZ due to changes in NH climate, but also by the contraction and expansion of the tropical rainbelt due to variations in sea surface temperature and southeast trade winds in the tropical South Atlantic Basin.

Details

Title
Tropical South Atlantic influence on Northeastern Brazil precipitation and ITCZ displacement during the past 2300 years
Author
Utida Giselle 1 ; Cruz, Francisco W 1 ; Etourneau Johan 2 ; Bouloubassi Ioanna 3 ; Schefuß Enno 4 ; Vuille Mathias 5 ; Novello, Valdir F 1   VIAFID ORCID Logo  ; Prado, Luciana F 6 ; Abdelfettah, Sifeddine 7 ; Klein, Vincent 3 ; Zular André 1 ; Viana, João C, C 8 ; Turcq Bruno 7 

1  University of São Paulo, Geosciences Institute, São Paulo, Brazil (GRID:grid.11899.38) (ISNI:0000 0004 1937 0722) 
2  CSIC-University of Granada, Andaluz Institute of Earth Sciences, Granada, Spain (GRID:grid.4489.1) (ISNI:0000000121678994) 
3  IRD-Sorbonne Universities (UPMC, Univ. Paris 06) - CNRS-MNHN, LOCEAN Laboratory, Center IRD France-Nord, Bondy, France (GRID:grid.462844.8) (ISNI:0000 0001 2308 1657) 
4  University of Bremen, MARUM - Center for Marine Environmental Sciences, Bremen, Germany (GRID:grid.7704.4) (ISNI:0000 0001 2297 4381) 
5  University at Albany, Department of Atmospheric and Environmental Sciences, Albany, USA (GRID:grid.265850.c) (ISNI:0000 0001 2151 7947) 
6  University of Brasília, Geosciences Institute, Brasília, Brazil (GRID:grid.7632.0) (ISNI:0000 0001 2238 5157) 
7  IRD-Sorbonne Universities (UPMC, Univ. Paris 06) - CNRS-MNHN, LOCEAN Laboratory, Center IRD France-Nord, Bondy, France (GRID:grid.462844.8) (ISNI:0000 0001 2308 1657); Fluminense Federal University, Department of Geochesmistry, Niterói, Brazil (GRID:grid.411173.1) (ISNI:0000 0001 2184 6919) 
8  Federal University of Bahia, Instituto de Biologia, Salvador, Brazil (GRID:grid.8399.b) (ISNI:0000 0004 0372 8259) 
Publication year
2019
Publication date
Dec 2019
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41598-018-38003-6
ProQuest document ID
2177679445
Copyright
This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.