An evaluation of controls on planktonic foraminiferal Sr/Ca
Sr/Ca in planktonic foraminifera recovered from the water column over 0-800 m along a meridional transect in the North Atlantic Ocean from 30° to 60°N were compared with data from core-top samples on the same transect and with in situ temperatures determined from water column CTD profiles. Species b...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2005 |
| País: | España |
| Recursos: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:158137 |
| Acesso em linha: | https://ddd.uab.cat/record/158137 https://dx.doi.org/urn:doi:10.1029/2005GC001047 |
| Access Level: | acceso abierto |
| Palavra-chave: | Paleotemperature reconstruction Planktonic foraminifera Trace elements |
| Resumo: | Sr/Ca in planktonic foraminifera recovered from the water column over 0-800 m along a meridional transect in the North Atlantic Ocean from 30° to 60°N were compared with data from core-top samples on the same transect and with in situ temperatures determined from water column CTD profiles. Species belonging to the globorotaliid genus show significant variability in Sr/Ca from place to place, whereas non-globorotaliid species show no significant variability. This variability for the globorotaliid species in core-top samples has already been shown to covary with calcification temperature derived from δ¹⁸O, but it also covaries with bottom depth (symptomatic of a dissolution artifact). These alternatives are distinguishable from the water column data for which the globorotaliid species show a small temperature dependence of 0.025 mmol/mol/°C within the range 5-15°C. However, temperature dependence is not supported by glacial-interglacial differences in Sr/Ca for globorotaliid and non-globorotaliid species, and at least from this perspective, a [CO₃²⁻] influence seems more likely. |
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