<smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> Vertical structure of the chemical properties of western Black Sea </smarttagtype>

Abstract

<smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> The data have been used to understand the variations of chemical features (distribution of nutrients, oxygen and sulfide) at specific density surfaces of the western Black Sea. The range and possible reasons of variations in the vertical profiles of nutrients, oxygen and hydrogen sulphide concentrations are discussed for the Black Sea. The concentrations of inorganic nutrients in the productive surface waters ranged between 0.02-0.30 μM for o.PO₄-P and 0.10-0.50 μM for the TNO_x-N. The maximum TNO_x value of 6.5-7.0 μM was found between the σ_θ=15.35-15.55 surfaces throughout the basin. The upper and the deeper phosphate maxima were observed at σ_θ=15.50-15.60 and σ_θ=16.20-16.25 surfaces, respectively. TNO_x/PO₄ ratios displayed distinct maxima at specific density surfaces of the upper nutricline. Si/TNO_x and Si/PO₄were also calculated in the western Black Sea. </smarttagtype>