Case Studies - Coastal Lagoons: Ecosystem Processes and Modeling for Sustainable Use and Development - page 375

WI N DS

15.0

10.0

5. 0

+ +++++++++++ + + + ++

0.0

− 5.0

SEA LEVEL L2

5.4
5.2
5.0
4.8
4.6
4.4
4.2

+ +++++++ +++ ++ + + +

SEA LEVEL L1

8.4
8.2
8.0
7.8
7.6
7.4
7.2

+ + +++++++ ++ ++++ +

SALINITY C1

31.0
30.5
30.0
29.5
29.0

+ + + + + + + +++++++++

T E MPERATURE C1

6.0
5.0
4.0
3.0
2.0

+++++ +++++ + +++++

6 7 8 9 0 1 2 3 4 5 6 7 8 9 20 1 22

MAY 1989

FIGURE 9.2.3 Wind vectors and sea levels at stations L1 and L2 (low frequency, dotted
line), salinity and temperatures at the surface (solid line) and at the bottom (dotted line) at
station C1 from May 5 to 20, 1989.

they are almost nonexistent (ellipse major axis speeds ~ 0.01 m/s). The water renewal
time in the deep basin was estimated to vary between 12 and 20 days. Since tidal
currents are almost nonexistent, water exchange in this basin must be due solely to a
combination of local winds and nonlocal forcing at the mouth. For completeness, local
winds and the forcing functions at the mouth (station C1, L1) are presented in
Figure 9.2.3 from May 5 to 20, 1989, a period during which current meter records are