Geoscience Reference
In-Depth Information
(A)
Atmospheric CO
2
(B)
Calcite saturation state
1200
6.0
Scenario
Control
5.0
1000
4.0
800
3.0
600
2.0
400
1.0
200
0.0
10
30
50
70
90
110
130
10
30
50
70
90
110
130
Time (year)
Time (year)
Net CaCO
3
production
and export
(C)
(D)
CaCO
3
dissolution
1.00
1.00
0.80
0.80
0.60
0.60
0.40
0.40
0.20
0.20
0.00
0.00
10
30
50
70
90
110
130
10
30
50
70
90
110
130
Time (year)
Time (year)
(E)
Cumulative air-sea CO
2
flux
800
8.0
CAL01
CAL02
CAL03
600
6.0
400
4.0
2.0
200
0
0.0
10
30
50
70
90
110
130
Time (year)
Figure 12.2
(A) Atmospheric CO
2
(ppmv) forcing used for the acidii cation scenarios and control runs. (B) Mean calcite saturation state of surface-ocean
waters (0-100 m). (C) Global net CaCO
3
production (full line) and export at 100 m (stippled line). (D) Global CaCO
3
dissolution l ux. (E) Cumulative air-sea
l ux of CO
2
on the left axis, and carbon uptake in excess to CAL03 on the right axis. CAL01, production and dissolution of CaCO
3
responds to changes in
carbonate chemistry; CAL02, constant production, but dissolution responds to changes in carbonate chemistry; CAL03, constant production and dissolution
(after Gehlen et al. 2007 ).
