Comment on “The Effects of Secular Calcium and Magnesium Concentration Changes on the Thermodynamics of Seawater Acid/Base Chemistry: Implications for Eocene and Cretaceous Ocean Carbon Chemistry and Buffering” by Hain et al. (2015)

Comment on “The Effects of Secular Calcium and Magnesium Concentration Changes on the... Hain et al. (2015, https://doi.org/10.1002/2014GB004986, hereafter H15) calculated effects of changing [Ca2+] and [Mg2+] on the equilibrium constants of the CO2‐CaCO3 system in seawater based on a Pitzer ionic interaction model. We show here that critical results presented in H15 are fundamentally wrong. We therefore do not recommend using H15's stoichiometric equilibrium constants to correct for past changes in major‐ion seawater composition. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Global Biogeochemical Cycles Wiley

Comment on “The Effects of Secular Calcium and Magnesium Concentration Changes on the Thermodynamics of Seawater Acid/Base Chemistry: Implications for Eocene and Cretaceous Ocean Carbon Chemistry and Buffering” by Hain et al. (2015)

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Publisher
Wiley Subscription Services, Inc., A Wiley Company
Copyright
©2018. American Geophysical Union. All Rights Reserved.
ISSN
0886-6236
eISSN
1944-9224
D.O.I.
10.1002/2017GB005786
Publisher site
See Article on Publisher Site

Abstract

Hain et al. (2015, https://doi.org/10.1002/2014GB004986, hereafter H15) calculated effects of changing [Ca2+] and [Mg2+] on the equilibrium constants of the CO2‐CaCO3 system in seawater based on a Pitzer ionic interaction model. We show here that critical results presented in H15 are fundamentally wrong. We therefore do not recommend using H15's stoichiometric equilibrium constants to correct for past changes in major‐ion seawater composition.

Journal

Global Biogeochemical CyclesWiley

Published: Jan 1, 2018

Keywords: ; ; ; ; ;

References

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