A double-edged sword: The role of sulfate in anoxic marine phosphorus cycling through Earth history


"Modern anoxic marine sediments release phosphorus (P) to seawater, driving feedbacks at multiple timescales. On sub-Myr timescales, anoxic P regeneration amplifies ocean deoxygenation; on multi-Myr timescales, it stabilizes atmospheric O2. Some authors have extended this thinking to the Precambrian: by analogy, widespread ocean anoxia would imply extensive P regeneration from sediments. However, this neglects the role of sulfate in P regeneration. [...]".


Source: Geophysical Research Letters
Authors: Michael A. Kipp

Read the full article here.


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