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Vertical Distributions of Oxygen, Turbidity, Fluorescence, and Current Velocity in NE Black Sea

This study examines vertical distributions of oxygen, turbidity, fluorescence, acoustic echo, and zonal current velocity in the northeastern Black Sea's continental slope during October 2009. Utilizing AquaLog profiler data from July 2007, gradient Richardson number estimates reveal significant features such as phytoplankton productivity and organic matter transport in the euphotic zone. Additionally, we explore dynamics in the oxycline and suboxic zone shaped by currents, tides, and internal waves, with implications for denitrification processes and the anoxic zone's organic matter sinking rates.

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Vertical Distributions of Oxygen, Turbidity, Fluorescence, and Current Velocity in NE Black Sea

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  1. Sensors Output Vertical distributions of oxygen, turbidity, fluorescence (left plot), acoustic echo (middle plot), and zonal current velocity (right plot) The mean gradient Richardson number estimates obtained by means of the AquaLog profiler in the continental slope waters of the northeastern Black Sea (NEBS) in October 2009 from the AquaLog data in NEBS in July 2007 0- 50 m - Euphotic zone: phytoplankton productivity, organic matter generation, transport of suspended matter by ocean The patches of the turbulence could appear at currents and eddies the depth of 50-80 m where <Ri> was sometimes 50-140 m - Oxycline: diel migration of zooplankton, fine structure of the sound scattering layers less that the threshold value of <Ri> = 0.25. 140-160 m - Suboxic zone: denitrification, vertical fluctuations of lower boundary of aerobic layer due to inertial oscillations, semidurnal tides, and internal waves Below 160 m - Anoxic zone (H2S & NH4 pool): organic matter (~0.05 mm in size) sinking with speed of 1 mm/s

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