| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Deep-dwelling foraminifera as thermocline temperature recorders
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| Autores: |
Cleroux, Caroline
Cortijo, Elsa
Duplessy, Jean-claude
Zahn, Rainer
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| Data: |
2007-04-25
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| Ano: |
2007
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| Palavras-chave: |
Deep-dwelling foraminifera
Depth habitat
Isotopic temperature
Thermocline
North Atlantic
Mauritanian upwelling
Ecological prediction
Stable isotopes
Micropaleontology
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| Resumo: |
We measured the oxygen isotopic composition of the deep-dwelling foraminiferal species G. inflata, G. truncatulinoides dextral and sinistral, and P. obliquiloculata in 29 modern core tops raised from the North Atlantic Ocean. We compared calculated isotopic temperatures with atlas temperatures and defined ecological models for each species. G. inflata and G. truncatulinoides live preferentially at the base of the seasonal thermocline. Under temperature stress, i.e., when the base of the seasonal thermocline is warmer than 16 degrees C, G. inflata and G. truncatulinoides live deeper in the main thermocline. P. obliquiloculata inhabits the seasonal thermocline in warm regions. We tested our model using 10 cores along the Mauritanian upwelling and show that the comparison of delta(18)O variations registered by the surficial species G. ruber and G. bulloides and the deep-dwelling species G. inflata evidences significant glacial-interglacial shifts of the Mauritanian upwelling cells.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00236/34727/33178.pdf
DOI:10.1029/2006GC001474
https://archimer.ifremer.fr/doc/00236/34727/
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| Editor: |
Amer Geophysical Union
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| Formato: |
application/pdf
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| Fonte: |
Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2007-04-25 , Vol. 8 , N. 4 , P. 1-19
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| Direitos: |
Copyright 2007 by the American Geophysical Union
info:eu-repo/semantics/openAccess
restricted use
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