Indian Ocean biological processes

PO4 (Broecker and Maier-Reimer, 1992). While the deep Indian and Pacific values follow the slope expected for biologic processes, deep waters which form in the North Atlantic and Southern Ocean have, respectively, lower and... 

On time scales of oceanic circulation (1000 y and less) the internal distribution of carbonate system parameters is modified primarily by biological processes. Gross sections of the distribution of Aj and DIG in the world s oceans (Fig. 4.4) and scatter plots of the data for these quantities as a function of depth in the different ocean basins (Fig. 4.5) indicate that the concentrations increase in deep waters (1-4 Ion) from the North Atlantic to the Antarctic and into the Indian and Pacific Oceans following the conveyer belt circulation (Fig. 1.12). Degradation of organic matter (OM) and dissolution of GaGOs cause these increases in the deep waters. The chemical character of the particulate material that degrades and dissolves determines the ratio of At to DIG. 

The deceptively simple reactions facilitated by the hydrogenases are shown in Equations 8.1-8.4. The processing of hydrogen is needed in biology for relief of excess reducing equivalents, or alternatively, to use H2 as a source of electrons (Equations 8.1 and 8.2). Indeed, some of the life forms mentioned earlier utilize H2 as the primary energy source. The mid-Indian Ocean hydrothermal vents... 

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