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Provedor de dados:  ArchiMer
País:  France
Título:  Mg/Ca-paleothermometry in the western Mediterranean Sea on planktonic foraminifer species Globigerina bulloides: Constraints and implications
Autores:  Boussetta, Soumaya
Kallel, Nejib
Bassinot, Franck
Labeyrie, Laurent
Duplessy, Jean-claude
Caillon, Nicolas
Dewilde, Fabien
Rebaubier, Helene
Data:  2012-05
Ano:  2012
Palavras-chave:  Mediterranean
Planktonic foraminifera
Sea surface Temperature
Vital effect
Resumo:  We generated a high-resolution SSTMg/Ca record for the surface-dwelling planktonic foraminifera Globigerina bulloides from the core MD99-2346 collected in the Gulf of Lion, and compared it to that obtained using modern analogue techniques applied to fossil foraminiferal assemblages (SSTMAT). The two temperature records display similar patterns during the last 28,000 years but the SSTMg/Ca estimates are several degrees warmer (similar to+4 degrees C) than SSTMAT. The temperature shift between SSTMg/Ca and SSTMAT remained relatively constant over time. This seems to exclude a bias on the Mg/Ca record associated with salinity or secondary Mg-rich calcite encrustation on the foraminiferal tests during early diagenesis. Therefore, anomalously high Mg/Ca suggests either: (1) the empirical equation for G. bulloides of Elderfield and Ganssen (2000) is incorrect; or (2) there is a specific Mediterranean genotypes of G. bulloides for which a specific Mg/Ca-temperature calibration is needed. (c) 2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
Tipo:  Text
Idioma:  Inglês

Editor:  Elsevier France-editions Scientifiques Medicales Elsevier
Formato:  application/pdf
Fonte:  Comptes Rendus Geoscience (1631-0713) (Elsevier France-editions Scientifiques Medicales Elsevier), 2012-05 , Vol. 344 , N. 5 , P. 267-276
Direitos:  2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.


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