【摘 要】
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The burning of fossil fuels has a profound influence on carbon reservoirs.The 13C/12C ratio of carbon dissolved in the ocean is changing as fossil fuel carb
【机 构】
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State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,State
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The burning of fossil fuels has a profound influence on carbon reservoirs.The 13C/12C ratio of carbon dissolved in the ocean is changing as fossil fuel carbon invades the surface.This will lead to deplete the 13C/12C ratio of organic matter when phytoplankton utilized dissolved carbon.The comparison of δ 13 Corg in surface sediments and that in sediment trap samples indicates that δ 13 Corg is slightly lighter in particulate matter than that in surface sediments.Considering the selective degradation will result in enrichment of lighter 13C/12C ratio of organic carbon in surface sediment,the abnormally light δ 13 Corg in sediment trap samples likely resulted from rapidly increasing pCO2 due to recent human activities.Based on reference methods we propose a simple approach for estimating the recent oceanic Suess effect of δ 13 Corg in the South China Sea,a semi-enclosed marginal sea in the west Pacific.
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