Coastal upwelling areas, oxygen

Coastal areas of upwelling, for example, off SW Africa, W. Mexico, Peru and E. Australia, correspond at present to the most rapid build up of ocean floor phosphorite deposits. It has been suggested that P cycling in the oceans may regulate the concentration of atmospheric oxygen [47]. The oceanic P concentration may be a limiting factor for photosynthetic processes and the production of oxygen, which in turn may influence the production of CO2 [39,48],... 

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