Sea-surface temperature reconstruction of the Quaternary western South Atlantic: New planktonic foraminiferal correlation function

Autor(es)

Garcia Chapori, Natalia ^[1] ; Chiessi, Cristiano Mazur ^[2] ; Bickert, Torsten ^[3] ; Laprida, Cecilia ^[1]

Afiliação do(s) autor(es)

^[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, CONICET, IDEAN, Dept Ciencias Geol, Buenos Aires, DF - Argentina

^[2] Univ Sao Paulo, Sch Arts Sci & Humanities, BR-03828000 Sao Paulo, SP - Brazil

^[3] Univ Bremen, MARUM, Ctr Marine Environm Sci, D-28359 Bremen - Germany

• Tipo de documento: Artigo Científico
• Fonte: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY; v. 425, p. 67-75, MAY 1 2015.
• Citações Web of Science: 3

Resumo

We provide a new multivariate calibration-function based on South Atlantic modern assemblages of planktonic foraminifera and atlas water column parameters from the Antarctic Circumpolar Current to the Subtropical Gyre and tropical warm waters (i.e., 60 degrees S to 0 degrees S). Therefore, we used a dataset with the abundance pattern of 35 taxonomic groups of planktonic foraminifera in 141 surface sediment samples. Five factors were taken into consideration for the analysis, which account for 93% of the total variance of the original data representing the regional main oceanographic fronts. The new calibration-function F141-35-5 enables the reconstruction of Late Quaternary summer and winter sea-surface temperatures with a statistical error of similar to 0.5 degrees C. Our function was verified by its application to a sediment core extracted from the western South Atlantic. The downcore reconstruction shows negative anomalies in sea-surface temperatures during the early-mid Holocene and temperatures within the range of modern values during the late Holocene. This pattern is consistent with available reconstructions. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 12/17517-3 - Resposta da porção oeste do Oceano Atlântico às mudanças na circulação meridional do Atlântico: variabilidade milenar a sazonal
• Beneficiário: Cristiano Mazur Chiessi
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Jovens Pesquisadores