Biological Fluxes in the Ocean and Atmospheric pCO2

0,41

MB

17

stron

5572

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University of Chicago

2004

rok

6.10.1 INTRODUCTION 275

6.10.2 CHEMICAL REARRANGEMENT OF THE WATERS OF THE OCEAN 276

6.10.2.1 The Organic Carbon Biological Pump 276

6.10.2.1.1 Nutrient limitation and new production 276

6.10.2.1.2 Iron as a limiting micronutrient 276

6.10.2.1.3 Measuring carbon export 277

6.10.2.2 CaCO3 Production and Export 277

6.10.2.2.1 Calcite and aragonite 277

6.10.2.2.2 Temperature and [CO2] regulation of CaCO3 production 278

6.10.2.2.3 Latitudinal distribution discrepancy 278

6.10.2.2.4 Organic C/CaCO3 production ratio 278

6.10.2.3 SiO2 Production and Export 278

6.10.2.4 Geochemical Signature of the Biological Pump 279

6.10.2.4.1 Organic carbon redissolution depth 279

6.10.2.4.2 CaCO3 water column redissolution 279

6.10.2.4.3 SiO2 sinking and redissolution 280

6.10.2.4.4 The ballast model for sinking particles 281

6.10.2.5 Direct Atmospheric pCO2 Signature of the Biological Pump 281

6.10.2.5.1 Organic carbon pump 281

6.10.3 CONTROLS OF MEAN OCEAN CHEMISTRY 282

6.10.3.1.1 Controls on organic matter burial 283

6.10.3.1.2 CaCO3 285

6.10.3.1.3 SiO2 286

6.10.3.1.4 Indirect atmospheric pCO2 signature of the biological pump 286

6.10.4 SUMMARY 287

REFERENCES 287