Tropical South Atlantic influence on Northeastern Brazil precipitation and ITCZ displacement during the past 2300 years

Autor(es):Mostrar menos -

Utida, Giselle ^[1] ; Cruz, Francisco W. ^[1] ; Etourneau, Johan ^[2] ; Bouloubassi, Ioanna ^[3] ; Schefuss, Enno ^[4] ; Vuille, Mathias ^[5] ; Novello, Valdir F. ^[1] ; Prado, Luciana F. ^[6] ; Sifeddine, Abdelfettah ^{[3, 7]} ; Klein, Vincent ^[3] ; Zular, Andre ^[1] ; Viana, Joao C. C. ^[8] ; Turcq, Bruno ^{[3, 7]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Geosci Inst, Rua Lago 562, BR-05508080 Sao Paulo - Brazil

^[2] Univ Granada, CSIC, Andaluz Inst Earth Sci, Granada - Spain

^[3] UPMC Univ Paris 06, Sorbonne Univ, CNRS, IRD, MNHN, LOCEAN Lab, Ctr IRD France Nord, F-93143 Bondy - France

^[4] Univ Bremen, MARUM Ctr Marine Environm Sci, D-28359 Bremen - Germany

^[5] SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 - USA

^[6] Univ Brasilia, Geosci Inst, BR-70910900 Brasilia, DF - Brazil

^[7] Fluminense Fed Univ, Dept Geochesmistry, BR-24020141 Niteroi, RJ - Brazil

^[8] Univ Fed Bahia, Inst Biol, BR-40170115 Salvador, BA - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 9, FEB 8 2019.
• Citações Web of Science: 3

Resumo

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. (AU)

• 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: 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