River/ocean mixing

Biogeochemical Processes on the Amazon Shelf Changes in Dissolved and Particulate Fluxes During River/Ocean Mixing... 

For these reasons, biogeochemical processes in the water column and in the seabed need to be understood in the Amazon River/ocean mixing zone. The specific objectives of the paper are as follows ... 

Carbon is transported into the Amazon River/ocean mixing zone in numerous forms including dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), and particulate organic carbon (POC). The average DIC, DOC, and POC concentrations in Amazon River water are 460, 275, and 180 pmol L-1 (Richey et al. 1991), which indicates that DOC supply exceeds POC supply and that DIC is the most abundant form of carbon in the river. Sholkovitz et al. (1978) noted that most riverine dissolved... 

Biogeochemkal Processes on the Aina2Dn Shdf Changes in Dissolved and Paniculate FIuks Duiing River/Ocean Mixing 339... 

The fluxes illustrated in Fig. 17.3 reveal several important aspects of N cycling in the Amazon River/ocean mixing zone. First, the external supply of biologically available dissolved nitrogen (totalling 10-12 x 10 mol d, including N fixation) is considerably... 

Biogeocheinical Processes on the Aina2on Shdf Changes in Dissolved and PaiticulalB Fluxes During River/Ocean Mixing 347... 

Modeling efforts must be conducted with these various geochemical studies. The cycling and export of chemical compounds within the river/ocean mixing zone are dependent on estuarine and shelf circulation. Characterizing the end member concentrations in Amazon River water, surface ocean water, upwelled offshore water, and the northward flowing North Brazilian... 

DeMaster D. J. and Aller R. C. (2001) Biogeochemical processes on the Amazon Shelf changes in dissolved and particulate fluxes during river/ocean mixing. In The Biogeochemistry of the Amazon Basin (eds. M. E. McClain, R. L. Victoria, and J. E. Richey). Oxford Press, pp. 328-357. 

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