Evacuation of organic matter (ОМ) by rivers exerts essential influence on development of the World Ocean. Study of ОМ in waters of the system river—Liman—the sea allows one to reveal peculiarities of its transport and transformations from rivers to seas and oceans. For proper understanding of the role the river runoff plays in geochemistry of the ocean, the knowledge of its quantitative and qualitative compositions is of importance and we need also to understand complicated and diverse physical-chemical and biological processes occurring at the contact of free-salined river and saline marine waters. Information on evacuation of OM by waters of the Amur River to the marginal seas of the Pacific Basin is extremely constrained, as for such information on evacuation of humic substances, it is almost missing. The goal of the paper is to bring out principally new data on the amount and distribution of ОМ and, particularly, of humus acids in the Amur River mouth and in the mixing zone between the river and marine waters.
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