Mortyn, P. G.; Elderfield, H.; Anand, P. and Greaves, M.
|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1029/2005GC001047|
|Google Scholar:||Look up in Google Scholar|
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 [CO3 2−] influence seems more likely.
|Item Type:||Journal Article|
|Keywords:||planktonic foraminifera; trace elements; paleotemperature reconstruction;|
|Academic Unit/Department:||Science > Environment, Earth and Ecosystems
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Pallavi Anand|
|Date Deposited:||01 Oct 2007|
|Last Modified:||14 Jan 2016 16:45|
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