Per citar aquest document:
Scopus: 17 cites, Web of Science: 18 cites,
An evaluation of controls on planktonic foraminiferal Sr/Ca : comparison of water column and core-top data from a North Atlantic transect
Mortyn, Peter Graham (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Elderfield, Henry (University of Cambridge. Department of Earth Sciences)
Anand, Pallavi (Vrije Universiteit Amsterdam. Faculty of Earth and Life Sciences)
Greaves, Mervyn (University of Cambridge. Department of Earth Sciences)

Data: 2005
Resum: 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.
Nota: Número d'acord de subvenció EC/FP5/EVK2-CT-2002-00135
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Paleotemperature reconstruction ; Planktonic foraminifera ; Trace elements
Publicat a: Geochemistry, geophysics, geosystems, Vol. 6, Issue 12 (Dec. 2005) , ISSN 1525-2027

DOI: 10.1029/2005GC001047

12 p, 5.0 MB

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