Exploring foraminiferal Sr/Ca as a new carbonate system proxy.

Keul, Nina, Langer, Gerald, Thoms, Silke, de Nooijer, Lennart Jan, Reichart, Gert-Jan and Bijma, Jelle (2017) Exploring foraminiferal Sr/Ca as a new carbonate system proxy. Geochimica et Cosmochimica Acta, 202 . pp. 374-386. DOI 10.1016/j.gca.2016.11.022.

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In present day paleoclimate research one of the most pressing challenges is the reconstruction of atmospheric CO2 concentrations. A variety of proxies for several components of the marine inorganic carbon system have been developed in this context (e.g. B isotopes, B/Ca, U/Ca) to allow reconstruction of past seawater pH, alkalinity etc., and thereby facilitate estimates of past atmospheric pCO2. Based on culture experiments using the benthic foraminifera Ammonia sp. we describe a positive correlation between Sr/Ca and the carbonate system, namely DIC/ bicarbonate ion concentration. Foraminiferal Sr/Ca ratios provide potentially additional constraints on the carbonate system proxy, because the analysis of foraminiferal carbonate Sr/Ca is straightforward and not easily contaminated. Applying our calibration to a published dataset of paleo-Sr/Ca suggests the validity of Sr/Ca as a carbonate system proxy. Furthermore, we explore how our data can be used to advance conceptual understanding of the foraminiferal biomineralization mechanism.

Exploring foraminiferal Sr/Ca as a new carbonate system proxy | Request PDF. Available from: https://www.researchgate.net/publication/310590799_Exploring_foraminiferal_SrCa_as_a_new_carbonate_system_proxy [accessed Jan 10 2018].

Document Type: Article
Keywords: C-system, Proxies, Ammonia, Strontium, DIC, Foraminifera, Sr/Ca, Calibration
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.gca.2016.11.022
ISSN: 0016-7037
Projects: Future Ocean
Date Deposited: 10 Jan 2018 13:45
Last Modified: 06 May 2019 09:26
URI: http://oceanrep.geomar.de/id/eprint/41380

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