1. Numerical modeling of upwelling filaments in the Gulf of Finland
Edith Soosaar,
Urmas Raudsepp
Marine Systems Institute Tallinn University of Technology

2. Outline Gulf of Finland Upwelling in the Gulf of Finland
Model setup (three different setups):
purpose,
setup,
results.
Conclusion

3. Gulf of Finland

4. Upwelling and upwelling filaments
6 July 2006
7 July 2006
11 July 2006

5. First setup
Purpose: to find most favorable wind for upwelling filaments formation
Setup:
Model area: Baltic Sea
Horizontal grid step (5.5 km)
10 vertical layers (two layer stratification)
Constant wind (8m/s) from eight cardinal point
Result: favorable for Estonian coast east wind and for Finland coast west wind

6. Second setup
Purpose: to observe formation of upwelling and upwelling filaments
Setup:
Area: Gulf of Finland
Horizontal grid step (2.7 km)
20 vertical layers
Constant wind (8m/s) from east and west
Measured temperature and salinity stratification.

7. Results of second setup
Upwelling occurred within 1.5 days
3.-4.days starting to form filaments (3.5 days)
Anticyclonic eddies (7.5 days)
Mushroom head shaped structure

8. Third setup Purpose: reality check Setup: Same as previous but added
Measured wind from ( July, 1999).

9. Results of third model setup

10. Conclusion Most favorable for present area east and west wind.
The location of filaments compare reasonably.
Strength and offshore extent was underestimated in the model.
Anticyclonic eddies turn filaments anti clockwise.
More pronounced filaments had started to form mushroom head shape.
Filaments tend to turn opposite direction. comparing with filaments on satellite temperature pictures.