1 Dynamics of nutrients in the Gdańsk Gulf; numerical simulations.

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12 Fig. 1. The map of the Gdańsk Gulf with the location of sampling stations.

13 Fig. 2a. Simulated profiles of temperature at the stations A and B

14 Fig. 2b. Simulated of surface temperature at the stations A and B

15 Fig. 3. Simulated profiles and observed values of total inorganic nitrogen at the stations A and B

16 Fig. 4. Simulated profiles and observed values of phosphate at the A and B

17 Fig. 5. Simulated and mean observed values of total inorganic nitrogen and phosphorus in the upper layer at the stations A and B total inorganic nitrogenphosphate Renk (2000) obtained relationship of phosphate and total inorganic nitrogen in the euphotic layer in the southern Baltic Sea as P=0.072N This equation suggests that in the vegetation season the P:N =1:14.1. In the Gdańsk Gulf in this period the N:P=10.8; but in the Gdańsk Deep is 6.5.

18 Fig. 6a. Simulated profiles of phytoplankton biomass at the stations A and B

19 Fig. 6b. Simulated and observed values of phytoplankton at the surface sea at the stations A and B

20 Fig. 7a. Simulated profiles of zooplankton biomass at the stations A and B

21 Fig. 7b. Simulated and observed values of depth integrated of zooplankton at the stations A and B

22 Fig. 8. Phytoplankton and zooplankton biomass at the stations A and B

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24 Thank you for attention