Inherent correlation between decreased marine sedimentary phosphorus and glacial atmospheric CO2 decline

Physics

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Biogeosciences: Biogeochemical Cycles, Processes, And Modeling (0412, 0793, 1615, 4805, 4912), Biogeosciences: Biosphere/Atmosphere Interactions (0315), Global Change: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 4805, 4912)

Scientific paper

The environmental and biogeochemical information implicated by a sediment column from the northern shelf of the South China Sea suggests that the vertical phosphorus variation in the sediment column bares a negative correlation with those of calcium carbonate and cadmium. The functional correlation between CO2 and PO43- in seawater is given by calculating a series of chemical equilibriums, indicating a coupling relationship between the accumulation of marine sedimentary P and the atmospheric CO2 change. The decreased P accumulation in marine sediments correlated to the increase of marine primary production during the glacial period might act as a key factor causing glacial atmospheric CO2 decline.

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