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Science 27 October 2006:
Vol. 314. no. 5799, p. 595
DOI: 10.1126/science.1128198
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Technical Comments

Comment on "Preindustrial to Modern Interdecadal Variability in Coral Reef pH"

Richard J. Matear

Ben I. McNeil

Based on the boron isotopic composition of coral from the southwestern Pacific, Pelejero et al. (Reports, 30 September 2005, p. 2204) suggested that natural variations in pH can modulate the impact of ocean acidification on coral reef ecosystems. We show that this claim cannot be reconciled with other marine carbon chemistry constraints and highlight problems with the authors' interpretation of the paleontologic data.

Commonwealth Scientific and Industrial Research Organisation Marine and Atmosphere Research, and Antarctic Climate and Ecosystem Cooperative Research Centre, Hobart, TAS, Australia.

Climate and Environmental Dynamics Laboratory, School of Mathematics, University of New South Wales, Sydney, NSW, Australia.

To whom correspondence should be addressed. E-mail: Richard.Matear{at}csiro.au

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Science. ISSN 0036-8075 (print), 1095-9203 (online)