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The role of calcium in regulating marine phosphorus burial and atmospheric oxygenation

Author

Listed:
  • Mingyu Zhao

    (Yale University)

  • Shuang Zhang

    (Yale University)

  • Lidya G. Tarhan

    (Yale University)

  • Christopher T. Reinhard

    (Georgia Institute of Technology)

  • Noah Planavsky

    (Yale University)

Abstract

The marine phosphorus cycle plays a critical role in controlling the extent of global primary productivity and thus atmospheric pO2 on geologic time scales. However, previous attempts to model carbon–phosphorus-oxygen feedbacks have neglected key parameters that could shape the global P cycle. Here we present new diagenetic models to fully parameterize marine P burial. We have also coupled this diagenetic framework to a global carbon cycle model. We find that seawater calcium concentration, by strongly influencing carbonate fluorapatite (CFA) formation, is a key factor controlling global phosphorus cycling, and therefore plays a critical role in shaping the global oxygen cycle. A compilation of Cenozoic deep-sea sedimentary phosphorus speciation data provides empirical support for the idea that CFA formation is strongly influenced by marine Ca concentrations. Therefore, we propose a previously overlooked coupling between Phanerozoic tectonic cycles, the major-element composition of seawater, the marine phosphorus cycle, and atmospheric pO2.

Suggested Citation

  • Mingyu Zhao & Shuang Zhang & Lidya G. Tarhan & Christopher T. Reinhard & Noah Planavsky, 2020. "The role of calcium in regulating marine phosphorus burial and atmospheric oxygenation," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15673-3
    DOI: 10.1038/s41467-020-15673-3
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    Cited by:

    1. Jinzhou Peng & Dengfeng Li & Simon W. Poulton & Gary J. O’Sullivan & David Chew & Yu Fu & Xiaoming Sun, 2024. "Episodic intensification of marine phosphorus burial over the last 80 million years," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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