A culture-based calibration of benthic foraminiferal paleotemperature proxies: delta O-18 and Mg/Ca results
Name
Filipsson-2010-A culture-based calibration of benthic foraminiferal.pdf
Size
1.35 MB
Format
Adobe PDF
Checksum (MD5)
159c5eb1b46634f72c1958d3add91116
Author(s)
Filipsson, H. L.
Bernhard, J. M.
Lincoln, Sara Ann
McCorkle, D. C.
Alternative Title
A culture-based calibration of benthic foraminiferal paleotemperature proxies: δ18O and Mg/Ca results
Date Issued
April 2010
Journal
Biogeosciences
Publisher
Copernicus Publications on behalf of the European Geophysical Society
Citation
Filipsson, H. L. et al. "A culture-based calibration of benthic foraminiferal paleotemperature proxies: [delta]18O and Mg/Ca results", Biogeosciences, 7, (2010) 1335-1347.
Version
Final published version
Abstract
Benthic foraminifera were cultured for five months at four temperatures (4, 7, 14 and 21 °C) to establish the temperature dependence of foraminiferal calcite δ18O and Mg/Ca. Two Bulimina species (B. aculeata and B. marginata) were most successful in terms of calcification, adding chambers at all four temperatures and reproducing at 7 and 14 °C. Foraminiferal δ18O values displayed ontogenetic variations, with lower values in younger individuals. The δ18O values of adult specimens decreased with increasing temperature in all but the 4 °C treatment, exhibiting a relationship consistent with previous δ18O paleotemperature calibration studies. Foraminiferal Mg/Ca values, determined by laser ablation inductively coupled plasma mass spectrometry, were broadly consistent with previous Mg/Ca calibration studies, but extremely high values in the 4 °C treatment and higher than predicted values at two of the other three temperatures make it challenging to interpret these results.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution 3.0
Persistent DSpace Link
DOI of Published Version
http://www.biogeosciences.net/7/1335/2010/bg-7-1335-2010.pdf
