Experimental data of CO2, CO3, Omega calcite saturation, pH values, alpha and epsilon fractionation factors, and Dδ¹⁸O calctite-water ...

The oxygen isotopic composition (d18O) of calcium carbonate of planktonic calcifying organisms is a key tool for reconstructing both past seawater temperature and salinity. The calibration of paloeceanographic proxies relies in general on empirical relationships derived from field experiments on ext...

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Bibliographic Details
Main Authors: Ziveri, Patrizia, Thoms, Silke, Probert, Ian, Geisen, Markus, Langer, Gerald
Format: Dataset
Language:English
Published: PANGAEA 2012
Subjects:
Species
Carbon dioxide, partial pressure
Carbonate ion
Calcite saturation state
pH
Fractionation factor
Δδ18O
Mediterranean Sea Acidification in a Changing Climate MedSeA
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158
Antarc*
Antarctic
Foraminifera*
Planktonic foraminifera
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.808168
https://doi.pangaea.de/10.1594/PANGAEA.808168
Description
Summary:The oxygen isotopic composition (d18O) of calcium carbonate of planktonic calcifying organisms is a key tool for reconstructing both past seawater temperature and salinity. The calibration of paloeceanographic proxies relies in general on empirical relationships derived from field experiments on extant species. Laboratory experiments have more often than not revealed that variables other than the target parameter influence the proxy signal, which makes proxy calibration a challenging task. Understanding these secondary or "vital" effects is crucial for increasing proxy accuracy. We present data from laboratory experiments showing that oxygen isotope fractionation during calcification in the coccolithophore Calcidiscus leptoporus and the calcareous dinoflagellate Thoracosphaera heimii is dependent on carbonate chemistry of seawater in addition to its dependence on temperature. A similar result has previously been reported for planktonic foraminifera, supporting the idea that the [CO3]2- effect on d18O is ... : Supplement to: Ziveri, Patrizia; Thoms, Silke; Probert, Ian; Geisen, Markus; Langer, Gerald (2012): A universal carbonate ion effect on stable oxygen isotope ratios in unicellular planktonic calcifying organisms. Biogeosciences, 9, 1025-1032 ...

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