Redox Stabilization of the Atmosphere and Oceans by Phosphorus-Limited Marine Productivity

Details Redox Stabilization of the Atmosphere and Oceans by Phosphorus-Limited Marine Productivity Redox Stabilization of the Atmosphere and Oceans by Phosphorus-Limited Marine Productivity

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996sci...271..493v&link_type=abstract

Science, Volume 271, Issue 5248, pp. 493-496

Mathematics

Logic

39

Scientific paper

Data from modern and ancient marine sediments demonstrate that burial of the limiting nutrient phosphorus is less efficient when bottom waters are low in oxygen. Massbalance calculations using a coupled model of the biogeochemical cycles of carbon, phosphorus, oxygen, and iron indicate that the redox dependence of phosphorus burial in the oceans provides a powerful forcing mechanism for balancing production and consumption of atmospheric oxygen over geologic time. The oxygen-phosphorus coupling further guards against runaway ocean anoxia. Phosphorus-mediated redox stabilization of the atmosphere and oceans may have been crucial to the radiation of higher life forms during the Phanerozoic.

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