2. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon

3. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Map of measurement polygon in Vistula Lagoon and the Baltic sea coastal zone

4. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon

5. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Salinity, Vistula Lagoon. Stations 318 – v36. 09.07.1997 Temperature, Vistula Lagoon. Stations 318 – v36. 09.07.1997 Distance along tow line, km

6. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Typical view of a head of gravity current in laboratory flume (Anuchin&Gritsenko, 1985) Current head structure, after Benjamin (1968) and Simpson (1982, 1986)

7. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Simulated (XZ) current: a)streamlines and density distribution b) vorticity and density

8. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon U 0 H 0  0 grid = 701 x 121  x=0.05  Simulated current

9. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon U 0 = 3.0 сm/s H 0 = 3.0 сm  0 = 0.001 g/сm 3  = 10 0 Evolution of density field

10. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon U 0 = 3.0 сm/s H 0 = 3.0 сm  0 = 0.001 g/сm 3  = 10 0 Evolution of density field and stream function

11. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Evolution of density field Slipping condition at the bottom U 0 = 3.0 сm/s H 0 = 3.0 сm  0 = 0.001 g/сm 3  = 10 0

12. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Evolution of density field and stream function U 0 = 3.0 сm/s H 0 = 3.0 сm  0 = 0.001 g/сm 3  = 10 0

13. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Fine structure of frontal zone Simulated (XZ) current: a)horizontal density gradient (green region) and streamlines (blue) b) Vertical density gradient (green region) and streamlines (blue) Blue background of streamlines is visible through transparent area of density gradient distribution where the last is negligibly small

14. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Simulated (XZ) current: a)density gradient module (green region) and streamlines (blue) b)density gradient along streamline (negative - green region, positive – pink) Blue background of streamlines is visible through transparent area of density gradient distribution where the last is negligibly small

15. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Density distribution, stream lines and density gradient along streamline Density distribution, stream lines and density gradient along streamline (green- negative, pink –positive)

16. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Density distribution, stream lines and velocity module (red lines) Density distribution, and velocity module (red lines)

17. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Vertical profile of density, horizontal and vertical components in head part of gravity current

18. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Motion of front of gravity current along the slope X front (t)

19. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon

20. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon S i = area{  i }, S i = S i (time) An increase in time of the square between iso-picnes (вовлечение)

21. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Ratio of areas under iso-pycns at following and at previous time steps Rate of increase of areas under corresponding iso-pycns at following and at previous time steps

22. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon X Y U 0 L 0  0

23. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Density and vorticity distributions on the blue background of streamlines

24. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Temperature, salinity and density profiles measured across the front of marine water intrusion into the fresh-water lagoon

25. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Temperature, salinity and density profiles measured across the front of marine water intrusion into the fresh-water lagoon

26. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon Upper panel: Velocity module distribution versus density iso-lines (blue – fresh water, gray – saline water) Lower panel: derivative of density along streamline (blue – streamlines, red – iso-pycns)

27. International conference “Fluxes and Structures in Fluids” St.Petersburg, 22-27 June 2003 Gritsenko V.A., Chubarenko I.P. On a fine structure of fronral zone of sea water inflow into a lagoon This work has been supported by INTAS project № 460 Mass transfer through submarine canyons