Study of dissolved oxygen content in the Eastern Bosporus Strait (Peter the Great Bay,Sea of Japan)

Seasonal changes in the dissolved oxygen (DO) content in water were analyzed based on long-term observations (2006–2013) in the Eastern Bosporus Strait (Peter the Great Bay, Sea of Japan). It was found that the monthly average DO concentrations at the bottom of the strait were significantly lower in summer than the average annual long-term data. The minimum DO contents were recorded during four months, from July to October. It was shown that the DO content in water depended on changes in current directions in the strait: lower DO contents resulted from hypoxic water inflow, mostly from Amur Bay.