CO2 budget of atmosphere in mol x 10^14/year and CO2 exchange in mol 10^14/year, between the atmosphere, rivers and the world oceans

Range Table - link mol CO2 x 10^14/year
Organism Biosphere
Reference Duursma EK, Boisson MPRM, Global oceanic and atmospheric oxygen stability considered in relation to the carbon-cycle and to different time scales. Oceanologica Acta (0399-1784) (Gauthier-Villars), 1994 , Vol. 17 , N. 2 , P. 117-141 link p.126 figure 4
Primary Source See pointers to refs in caption to figure
Comments P.126 left column bottom paragraph: "A problem still unsolved concerns the present-day CO2 fluxes between atmosphere and oceans. In Figure 4 B a budget is shown, in which the input of land runoff is fully taken into account." P.126 right column bottom paragraph: "Since the atmosphere to oceans CO2 influx data derive from two different methods, namely 13C/12C evidence and satellite determination of the CO2 air-sea exchange coefficient over the complete oceans, the budget calculation of Figure 4B still has some defects, at least for the ocean margins. These may be related to CO2 degassing from coastal waters or burial of carbonates in coastal sediments, which escape 13C/12C and satellite measurements." P.136 right column 3rd paragraph: "As was already mentioned in the paragraph on air-sea exchange of CO2 (see Fig. 4), continental shelf processes may have a non-negligible impact. For the oxygen exchange of the oceans, this seems equally the case (Fig. 14). The input of organic matter by rivers is estimated by Meybeck (1993) at 400 million ton of organic C/yr, which is equivalent to 0.33 x 10^14 mol Org.-C. Another value is given by Sarmiento and Sunquist (1992) ranging between 0.25 and 0.42 x 10^14 mol/yr. For an average of 0.375 x 10^14 mol/yr, this will cause a potential oxygen use of the same value. The world rivers bring into the oceans an additional 0.1 x 10^14 mol free-dissolved O2 (Fig. 14). Burial of organic matter (Fig. 4) ranges from 0.011 to 0.13 x 10^14 mol/yr, giving a surplus of oxygen to the oceans."
Entered by Uri M
ID 116104