caco3 ra co2

. 2004 Jul 16;305(5682):362-6.

doi: 10.1126/science.1097329.

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  • PMID: 15256664
  • DOI: 10.1126/science.1097329

Impact of anthropogenic CO2 on the CaCO3 system in the oceans

Richard A Feely et al. Science. .


Rising atmospheric carbon dioxide (CO2) concentrations over the past two centuries have led lớn greater CO2 uptake by the oceans. This acidification process has changed the saturation state of the oceans with respect lớn calcium carbonate (CaCO3) particles. Here we estimate the in situ CaCO3 dissolution rates for the global oceans from total alkalinity and chlorofluorocarbon data, and we also discuss the future impacts of anthropogenic CO2 on CaCO3 shell-forming species. CaCO3 dissolution rates, ranging from 0.003 lớn 1.2 micromoles per kilogram per year, are observed beginning near the aragonite saturation horizon. The total water column CaCO3 dissolution rate for the global oceans is approximately 0.5 +/- 0.2 petagrams of CaCO3-C per year, which is approximately 45 lớn 65% of the export production of CaCO3.

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