North Atlantic Globorotalia inflata coretop Mg/Ca calibrations and temperature reconstructions over Termination I

• Published in: IOP Conference Series: Earth and Environmental Science
• Main Authors: Farmer, Elizabeth J., Chapman, Mark R., Andrews, Julian E.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: 2010
• Subjects: North Atlantic; Planktonic foraminifera
• Online Access: https://ueaeprints.uea.ac.uk/id/eprint/37823/; https://doi.org/10.1088/1755-1315/9/1/012019

Mg/Ca ratios from planktonic foraminifera are widely used as an independent proxy for ocean temperature. The choice of calibration is vital for reconstructing meaningful temperatures. We present preliminary results based on a new Mg/Ca-temperature calibration (Mg/Ca = 0.92e0.039T) for the thermocline-dwelling foraminifera Globorotalia inflata, derived using a suite of North Atlantic coretops. The downcore Mg/Ca record from core SU90–03 (40°N, 32°W) was used to compare how our new and existing calibrations performed for the Holocene and over the large scale change associated with Termination I.