Features of formation of oxygen regime in the North-Eastern Black Sea
The paper presents a long-term analysis of the seasonal dynamics of the formation of the oxygen regime in the North-Eastern part of the Black Sea for the period of 1996–2017. The studies were conducted in the deep and coastal areas in vertical sections. It is shown that in the early spring period the oxygen saturation of the deep and coastal waters of the Black Sea was relatively low. At deep-water stations, the absence of thermocline can lead to the formation of oxycline in the center of the cyclone vortex at depths up to 60 m. In spring, in the coastal and deep water areas, the photosynthesis layer is always above the thermocline at depths of up to 20 m with higher oxygen saturation in the coastal zone of the sea. In summer, phytoplankton biomass reaches its maximum in the deep and coastal waters of the Black Sea, the depth of the thermocline increases, the power of the photosynthetic layer is located above the thermocline and can reach 50 m. In the early-autumn period of the year, the lowering of deep waters was noted at the coastal and deep-water stations, the depth of thermocline reaches its maximum, and the intensity of photosynthesis, the most pronounced in the surface horizon, decreases. In the coastal part of the North-Eastern Black Sea, the influence of water circulation is observed on the horizons of more than 40 m with the release of deep oxygen-poor waters in the dynamic area of Anapa–Novorossiysk–Gelendzhik.
| Main Authors: | , |
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| Other Authors: | |
| Format: | Conference Material biblioteca |
| Language: | Russian |
| Published: |
Azov Sea Research Fisheries Institute (AzNIIRKH)
2018
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| Subjects: | Long-term records, Seasonal variations, Oxygen depletion, Phytoplankton, Biomass, Water circulation, Thermocline, Насыщение воды кислородом, Сезонная динамика, Термоклин, Глубоководные станции, Прибрежная зона, |
| Online Access: | http://hdl.handle.net/1834/15400 |
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