The objective of this report is to discuss the marine characteristics which the author examined in connection with the marine contamination in the Arctic Ocean (Kara Sea, Barents Sea).
The sea regions subjected to the research are located in longitude 0°to 130°east and latitude 64°to 85°north. For the sake of convenience, these regions are called the Arctic Ocean.
Most of coast lines in these regions belong to Russia. In recent years, it has been clarified that in Russia high-level radioactive contamination is taking place owing to the dumping of nuclear waste materials, the release of waste liquids containing a large amount of radionuclides from mines, etc., in addition to frequent crude - oil spill accidents caused by broken petroleum pipelines. In the event that the contamination caused by such accidents directly extends to the ocean and countermeasures must be taken against it, what is most important is to gain a correct understanding of fundamental marine characteristics in these regions.
Using the observation data (water temperature, salinity), therefore, the author examined the water-mass characteristics of the Arctic Ocean with reference to the known literature and compared the results thus obtained with the results of flow analysis, and investigated the present situation of flow. Additional research was also conducted on the relationship between the analytical results of this flow and the movement of cod larvae in the Barents Sea.

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