A robust calibration of the clumped isotopes to temperature relationship for foraminifers

Meinicke, N.
Ho, S. L.
Hannisdal, B.
Nürnberg, Dirk
Tripati, A.
Schiebel, R.
Meckler, A. N.

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Publication date

February 2020

DOI

10.1016/j.gca.2019.11.022

Publisher

Elsevier BV

Abstract

The clumped isotope (Δ47) proxy is a promising geochemical tool to reconstruct past ocean temperatures far back in time and in unknown settings, due to its unique thermodynamic basis that renders it independent from other environmental factors like seawater composition. Although previously hampered by large sample-size requirements, recent methodological advances have made the paleoceanographic application of Δ47 on small (<5 mg) foraminifer samples possible. Previous studies show a reasonable match between Δ47 calibrations based on synthetic carbonate and various species of planktonic foraminifers. However, studies performed before recent methodological advances were based on relatively few species and data treatment that is now outdate...