Arctic Ocean benthic foraminifera Mg/Ca ratios and global Mg/Ca-temperature calibrations: New constraints at low temperatures

• Published in: Geochimica et Cosmochimica Acta
• Main Authors: Barrientos, Natalia, Lear, Caroline, Jakobsson, Martin, Stranne, Christian, O'Regan, Matt, Cronin, Thomas M., Gukov, Alexandr Y., Coxall, Helen K.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Meteoritical Society 2018
• Subjects: Arctic; Arctic Ocean; Chukchi Sea; East Siberian Sea; Laptev Sea; Petermann Fjord; Chukchi; Foraminifera*; laptev; Lomonosov Ridge
• Online Access: https://orca.cardiff.ac.uk/id/eprint/109925/; https://doi.org/10.1016/j.gca.2018.02.036; https://orca.cardiff.ac.uk/id/eprint/109925/7/1-s2.0-S0016703718301182-main.pdf

We explore the use of Mg/Ca ratios in six Arctic Ocean benthic foraminifera species as bottom water palaeothermometers and expand published Mg/Ca-temperature calibrations to the coldest bottom temperatures (<1 °C). Foraminifera were analyzed in surface sediments at 27 sites in the Chukchi Sea, Ea...