Geoscience Reference
In-Depth Information
Table 4.5 Simulation results in which various nutrient concentrations are used (
φ
=12
°
S,
ʻ
=82
°
W)
Depth (m)
Biomass of phytoplankton (kg/m
2
)
B
12
(
, z, t
0
) = 0.05 mg/m
3
, z, t
0
) = 2 mg/m
3
φ
,
ʻ
B
12
(
φ
,
ʻ
t
−
t
0
(days)
t
−
t
0
(days)
10
50
100
10
50
100
Initial nutrient concentrations are held in z
≤
150 m
0
10
0.08
3.49
5.73
3.92
2.14
28.06
-
10
20
8.43
19.48
12.05
22.99
5.19
56.31
-
20
-
30
9.67
25.28
33.54
25.45
38.89
75.49
30
-
40
9.64
27.98
33.27
26.59
66.41
86.36
40
50
9.26
28.27
33.26
30.88
40.52
27.93
-
50
60
9.39
28.23
29.18
28.31
24.39
21.04
-
60
-
70
11.97
27.77
26.59
27.81
8.63
84.69
70
80
6.16
15.23
13.98
21.84
2.29
63.49
-
80
90
2.79
7.52
6.56
10.74
0.29
22.75
-
90
-
100
0.78
3.09
3.52
5.91
0.08
6.16
100
150
1.45
3.93
4.23
3.99
0.43
8.63
-
150
200
1.15
3.81
2.63
4.09
0.46
11.63
-
Initial nutrient concentrations are held in z > 150 m
0
10
0.08
0
0
3.07
4.19
19.61
-
10
20
0.09
0
0
4.13
4.35
35.59
-
20
-
30
0.15
0
0
31.05
19.65
40.57
30
-
40
0.21
0
0
28.02
42.65
72.46
40
50
1.52
0
0
35.64
66.36
69.56
-
50
60
3.53
0.03
0
19.64
55.78
44.79
-
60
-
70
3.22
0.17
0
13.32
21.79
12.84
70
80
2.49
0.13
0
11.69
13.22
6.09
-
80
90
1.41
0.13
0
4.51
5.96
2.92
-
90
-
100
1.28
0.05
0.01
2.09
2.67
3.07
100
150
0.93
0.18
0.01
2.19
2.96
2.54
-
150
200
0.75
0.12
0.01
2.91
1.86
3.53
-
characterized by a wider coverage of processes taking place in the system. It allows
for their variations in time and space.
The structure of the PCEM software provides an opportunity for an early cor-
rection of functional dependencies in the model equations, for introducing and
exclusion of components, reorientation of trophic graph and introduction of other
hypothetic situations.
A further improvement of the PCEM involves consideration of new data on
ecosystem elements and processes taking place in the system, allowance for water
heterogeneity and salinity and speci
cation of the trophic graph on its higher levels.
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