The north-eastern Black Sea redox zone hydrochemical structure: observed concentrations and estimated fluxes

peer reviewedThe fine structure of the hydrophysical and hydrochemical parameters observed in the northeastern Black Sea during the 1999-2002 RV ”Akvanavt” cruises is discussed. The observed increase of organic phosphorus and urea at the boundary of oxic and anoxic waters testify that the hydrochmical structure is significantly influenced by chemosynthesis. The calculated nitrogen compound fluxes support the idea that organic nitrogen can be the significant part of total nitrogen in the oxic/anoxic interface