CHAPTER 5 . Hydrographical Characteristics of the Estuarine Area of Patos Lagoon
280
Itapea
240
200
E
~160
Arambare
Qj
u
C
'"
.~ 120
0
80
P. ~tori.
40
0
Praticagem
30
60
90 120 150 180 210 240 270 300 330
Time (Julian days)
280
Itapea
240
200
E
~ 160
Arambare
Qj
v
c
'"
.; 120
0
80
P. Feitoria
40
0
Praticagem
30
60
90 120 150 180 210 240 270 300 330
Time (Jul ian days)
Fig. 5.4. Longitudinal temperature (DC) distribution observed in 1988 at a surface and b bottom
Temperature (Fig. 5.4a,b) shows typical seasonal pattern reaching values between
25 and 26° C in the Austral summer (Jan.-Mar., days 1 through 90). In winter temperature is around 10° C. In terms of longitudinal distribution small differences are found
between northern and southern portions with temperature decreasing southwards.
This is a latitudinal effect that can be also noticed through satellite images (Ghisolfi
1995). The water column tends to be homogeneous along the whole lagoon but a thermocline associated with entrance of saltier and colder coastal waters may be developed in the channel area.
280
Itapea
240
200
E
~160
Arambare
Qj
u
C
'"
.~ 120
0
80
P. ~tori.
40
0
Praticagem
30
60
90 120 150 180 210 240 270 300 330
Time (Julian days)
280
Itapea
240
200
E
~ 160
Arambare
Qj
v
c
'"
.; 120
0
80
P. Feitoria
40
0
Praticagem
30
60
90 120 150 180 210 240 270 300 330
Time (Jul ian days)
Fig. 5.4. Longitudinal temperature (DC) distribution observed in 1988 at a surface and b bottom
Temperature (Fig. 5.4a,b) shows typical seasonal pattern reaching values between
25 and 26° C in the Austral summer (Jan.-Mar., days 1 through 90). In winter temperature is around 10° C. In terms of longitudinal distribution small differences are found
between northern and southern portions with temperature decreasing southwards.
This is a latitudinal effect that can be also noticed through satellite images (Ghisolfi
1995). The water column tends to be homogeneous along the whole lagoon but a thermocline associated with entrance of saltier and colder coastal waters may be developed in the channel area.