3D modeling the Baltic Sea ecosystem under different land loads

Two simulations of the Baltic Sea state under different nutrient land loads estimated within the MARE and the SEGUE projects were performed with the St. Petersburg Baltic Eutrophication Model (SPBEM) for the period 1996-2000. Comparison of results of these two runs of nutrient land loads showed that the differences in concentrations of biogeochemical characteristics by the end of the period considered are significant in the coastal zone, especially in the vicinity of the major river mouths. This implies that a careful reassessment of nutrient land loads is needed before the implementation of scenario simulations of nutrient load reduction measures.