Articles | Volume 20, issue 4
https://doi.org/10.5194/cp-20-991-2024
https://doi.org/10.5194/cp-20-991-2024
Research article
 | 
25 Apr 2024
Research article |  | 25 Apr 2024

No detectable influence of the carbonate ion effect on changes in stable carbon isotope ratios (δ13C) of shallow dwelling planktic foraminifera over the past 160 kyr

Peter Köhler and Stefan Mulitza

Data sets

Mono-specific non-polar stacks of δ13C and δ18O from the planktic foraminifera G. ruber and T. sacculifer and simulation results of the 13C cycle across the last glacial cycle P. Köhler and S. Mulitza https://doi.org/10.1594/PANGAEA.963761

World Atlas of late Quaternary Foraminiferal Oxygen and Carbon Isotope Ratios (WA_Foraminiferal_Isotopes_2022) S. Mulitza et al. https://doi.org/10.1594/PANGAEA.936747

(Table 2) Stable carbon and oxygen isotope ratios of Globigerinoides ruber from sediment core MD77-169 J.-C. Duplessy https://doi.org/10.1594/PANGAEA.726202

CO2 concentration and stable isotope ratios of three Antarctic ice cores covering the period from 149.4-1.5 kyr before 1950 S. Eggleston et al. https://doi.org/10.1594/PANGAEA.859181

Compilations and splined-smoothed calculations of continuous records of the atmospheric greenhouse gases CO2, CH4, and N2O and their radiative forcing since the penultimate glacial maximum P. Köhler et al. https://doi.org/10.1594/PANGAEA.871273

Taylor Glacier CO2 Isotope Data 74-59 kyr J. Menking et al. https://doi.org/10.15784/601600

Plio-Pleistocene simulations from a global carbon cycle box model P. Köhler https://doi.org/10.1594/PANGAEA.940169

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Short summary
We constructed 160 kyr long mono-specific stacks of δ13C and of δ18O from the wider tropics from the planktic foraminifera G. ruber and/or T. sacculifer and compared them with carbon cycle simulations using the BICYCLE-SE model. In our stacks and our model-based interpretation, we cannot detect a species-specific isotopic fractionation during hard-shell formation as a function of carbonate chemistry in the surrounding seawater, something which is called a carbonate ion effect.