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Calibration of the B/Ca proxy in the planktic foraminifer Orbulina universa to Paleocene seawater conditions

Haynes, Laura L.; Hönisch, Bärbel; Dyez, Kelsey A.; Holland, Katherine; Rosenthal, Y; Fish, Carina R.; Subhas, Adam V.; Rae, James W.B.

Description

The B/Ca ratio of planktic foraminiferal calcite, a proxy for the surface ocean carbonate system, displays large negative excursions during the Paleocene-Eocene Thermal Maximum (PETM, 55.9 Ma), consistent with rapid ocean acidification at that time. However, the B/Ca excursion measured at the PETM exceeds a magnitude that modern pH calibrations can explain. Numerous other controls on the proxy have been suggested, including foraminiferal growth rate and the total concentration of dissolved...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
URI: http://hdl.handle.net/1885/217891
Source: Paleoceanography
DOI: 10.1002/2016PA003069

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