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Science 27 October 2006:
Vol. 314. no. 5799, p. 595
DOI: 10.1126/science.1128502
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Technical Comments

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

Carles Pelejero

Eva Calvo

Malcolm T. McCulloch

John F. Marshall

Michael K. Gagan

Janice M. Lough

Bradley N. Opdyke

Coral reefs are exceptional environments where changes in calcification, photosynthesis, and respiration induce large temporal variations of pH. We argue that boron isotopic variations in corals provide a robust proxy for paleo-pH which, together with the likely concomitant changes in the reconstructed partial pressure of CO2 (PCO2) calculated by Matear and McNeil, fall within ranges that are typical of modern coral reef ecosystems.

Institució Catalana de Recerca i Estudis Avançats, ICREA, and Institut de Ciències del Mar, ICM-CSIC, Pg. Marítim de la Barceloneta, 37-49, 08003, Barcelona, Catalonia, Spain.

Institut de Ciències del Mar, CMIMA-CSIC, Pg. Marítim de la Barceloneta, 37-49, 08003, Barcelona, Catalonia, Spain.

Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia.

Petroleum and Marine Division, Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia.

Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia.

Australian Institute of Marine Science, PMB #3, Townsville Mail Centre, QLD 4810, Australia.

Department of Earth and Marine Sciences, Australian National University, Canberra, ACT 0200, Australia.

To whom correspondence should be addressed. E-mail: pelejero{at}icm.cat (C.P.); ecalvo{at}icm.cat (E.C.)

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