Surface and near-bottom water saturation with CaCO3 in the Pomeranian Bay in the vicinity of the Świna Channel mouth

Langmuir and Langelier calcite saturation indexes were calculated for water in the vicinity of the Świna Channel in the Pomeranian Bay. Measurements carried out in April-October of 1994 and 2004 indicated that CaCO3 concentrations nearly reached the saturation level, though in spring and fall the water showed slight calcite unsaturation while in summer it was oversaturated with calcite. The observed saturation levels were related with the shifts in the equilibrium between assimilation and dissimilation processes in the Pomeranian Bay ecosystem.