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Mortyn et al. 2005
Mortyn, P.G., Elderfield, H., Anand, P. and Greaves, M. (2005). An evaluation of controls on planktonic foraminiferal Sr/Ca: Comparison of water column and core-top data from a North Atlantic transect. Geochemistry Geophysics Geosystems 6: doi: 10.1029/2005GC001047. issn: 1525-2027.

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 32-> influence seems more likely.

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Abstract

Keywords
Paleoceanography, Geochemical tracers, Paleoceanography, Sea surface temperature, Paleoceanography, Instruments and techniques, planktonic foraminifera, trace elements, paleotemperature reconstruction
Journal
Geochemistry Geophysics Geosystems
Publisher
American Geophysical Union
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