Riverine fluxes

Larson SJ, Capel PD, Goolsby DA, et al. 1995. Relations between pesticide use and riverine flux in the Mississippi River basin. Chemosphere 31 3305-3321. 

Table 19.2 Comparison of Hydrothermal Fluxes to Riverine Fluxes. ... 

Accumulation in Water column, Total Organic Export to Open Ocean m Accumulation in Sediments Accumulation in Water Column, Dissolved Inorganic m Riverine Flux, Refractory Particulate Organic... 

Figure 10.30. Phanerozoic sedimentary rock mass-age relationships expressed as the logarithm of the survival rate in tons y-1 versus time. The straight lines are best fits to the total mass data (solid line) and to the carbonate mass data (dash-dot line) for particular intervals of Phanerozoic time. The difference between the logarithm of S for the carbonate mass and that of the dolomite mass is the survival rate of the calcite mass. Filled star is present total riverine flux to the oceans, whereas open star is carbonate flux.

Of the organic carbon entering the ocean, about 35% accumulated in marine sediments as organic carbon with a molar C/N/P ratio of about 250/20/1 (Mackenzie, 1981) the rest was respired and oxidized to CO2 and evaded the ocean. The nitrogen and phosphorus riverine fluxes of 1 and 0.045 x 1012 moles y1, respectively, represented the nutrient fluxes necessary to support the organic matter accumulation of 11.7 x 1012 moles C y1. 

Inputs of atmospheric sources of P are generally considered to be insignificant to coastal systems and represent <10% of the riverine flux of reactive P. 

Rivers transport an estimated 20 Pg y 1(l Pg = 1015 = 1 gigaton) of fluvial sediments to the coastal margin associated with this sediment loading is an estimated 0.21 Pg of POC y-1. Global estimates of riverine flux of DOC to the oceans range from about 0.25 to 0.36 Pg y-1. 

Levasseur S., Birck J. L., and AUegre C. J. (1999) The osmium riverine flux and the oceanic mass balance of osmium. Earth... 

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