Impact of Anthropogenic CO 2 on the CaCO 3 System in the Oceans
Top Cited Papers
- 16 July 2004
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 305 (5682), 362-366
- https://doi.org/10.1126/science.1097329
Abstract
Rising atmospheric carbon dioxide (CO 2 ) concentrations over the past two centuries have led to greater CO 2 uptake by the oceans. This acidification process has changed the saturation state ofthe oceans with respect to calcium carbonate (CaCO 3 ) particles. Here we estimate the in situ CaCO 3 dissolution rates for the global oceans from total alkalinity and chlorofluorocarbon data, and we also discuss the future impacts of anthropogenic CO 2 on CaCO 3 shell–forming species. CaCO 3 dissolution rates, ranging from 0.003 to 1.2 micromoles per kilogram per year, are observed beginning near the aragonite saturation horizon. The total water column CaCO 3 dissolution rate for the global oceans is approximately 0.5 ± 0.2 petagrams of CaCO 3 -C per year, which is approximately 45 to 65% of the export production of CaCO 3 .Keywords
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