@misc{rathmann2004mrot, author={S\"{o}hnke {Rathmann} and Silvia {Hess} and Henning {Kuhnert} and Stefan {Mulitza}}, title={{Magnesium/calcium ratio of the foraminifera Oridorsalis umbonatus in surface sediment samples off Namibia}}, year={2004}, doi={10.1594/PANGAEA.726732}, url={https://doi.org/10.1594/PANGAEA.726732}, note={Supplement to: Rathmann, S et al. (2004): Mg/Ca ratios of the benthic foraminifera Oridorsalis umbonatus obtained by laser ablation from core top sediments: Relationship to bottom water temperatures. Geochemistry, Geophysics, Geosystems, 5(12), Q12013, https://doi.org/10.1029/2004GC000808}, abstract={A laser ablation system connected to an inductively coupled plasma mass spectrometer was used to determine Mg/Ca ratios of the benthic foraminifera Oridorsalis umbonatus. A set of modern core top samples collected along a depth transect on the continental slope off Namibia (320-2300 m water depth; 2.9{\textdegree} to 10.4{\textdegree}C) was used to calibrate the Mg/Ca ratio against bottom water temperature. The resulting Mg/Ca-bottom water temperature relationship of O. umbonatus is described by the exponential equation Mg/Ca = 1.528$\ast$e$\ast$$\ast$0.09$\ast$BWT. The temperature sensitivity of this equation is similar to previously published calibrations based on Cibicidoides species, suggesting that the Mg/Ca ratio of O. umbonatus is a valuable proxy for thermocline and deep water temperature.}, type={data set}, publisher={PANGAEA} }