Geochemistry of Organic Matter in River-Sea Systems - download pdf or read online

By V.E. Artemyev

ISBN-10: 9400916817

ISBN-13: 9789400916814

ISBN-10: 9401072531

ISBN-13: 9789401072533

One of the elemental suggestions of ocean biogeochemistry is that of an ocean with super energetic boundary zones and separation barriers of intensive biochemical interactions. The parts of those zones are characterised through a pointy lessen of aspect migration depth and as a result the reduce of their concentrations gave the bounds for the naming of the geochemical limitations (Perelman, 1972). For the needs of biogeo­ chemistry crucial ones are the bounds of separation among river-sea, ocean-atmosphere, and water-ground (Lisitzin, 1983). the main complex of them is the river-sea boundary, the place the biogeochemical procedures are the main lively and intricate (Monin and Romankevich, 1979, 1984). the need of learning natural subject in rivers, mouth areas and adjacent sea aquatories has been time and again mentioned via v.I. Vernadsky (1934, 1960) who famous either the significance of registration of sturdy and liquid run-off of rivers, getting into the ocean, and "the caliber and the nature of these components, that are washed-down into the sea", emphasizing that "wash-down of natural ingredients into the ocean is of serious value". The curiosity in learning natural topic in ordinary waters, together with river and sea waters, has grown significantly over the past 30 years. in this interval crucial fabric used to be accumulated at the content material and composition of natural topic in numerous varieties of river waters of the USSR, and this was once released in papers by way of B.A Scopintzev, advert. Semenov, M.V.

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0% (Figure 13). 7% respectively. 8%). As a rule, CP equals to 10-20% of the Amazon suspension. According to our investigations organic matter in the waters of the Amazon is mainly in the dissolved form, which is illustrated, in particular, by the Cd/CP ratio (Table 20). 7 on average for surfacial and bottom waters respectively. 7 x 1013 g of Cd a year. As it was shown as a result of investigations (Meybeck, 1981) nitrogen is available in river waters mainly in the suspended form. This is nitrogen of protein-like material, as well as that adsorbed in clays and other mineral particles.

1987 Winter May 1985 Spring Febr. 1987 Winter May 1985 Spring Febr. 7 mg/l, 20 mg/! on average) of all the studied rivers were found in the mouth of the North Dvina river (Tables 13 and 16). It is bound up with the fact that rivers of the Arctic Ocean basin cross excessively moist taiga-forest, forest-tundra and tundra zones with podsolic, paludal soils. , 1987). Largest rivers of the White Sea and the Barents Sea such as Pechora and North Dvina deliver about 8 x 106 t of organic matter (Table 13) per year or 73% of the total quantity of organic matter, run-off by rivers into these seas.

Such regularity is evidently bound up with the higher activity of phytoplankton which produce the organic matter in the summer-autumn period, contributing to dissolved organic matter accumulation and, in particular, accumulation of proteins in river water. The connection of the content of proteins in river water with the process of primary production of organic matter by phytoplankton testifies to their autochthonous genesis. 2. 2%) of organic matter (Tables 25 and 26). Organic Substance of River Run-Off 51 Table 24.

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Geochemistry of Organic Matter in River-Sea Systems by V.E. Artemyev

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