301
The Carbonate System
(coccoliths, foram shells, reagent calcite, and pteropod shells) in chambers through which
seawater was drawn (Figure 7.39). The aragonite lysocline was found to be higher than
the value for calcite in the water column. The depth of the lysocline found by suspending
CaCO 3 (s) agrees very well with the decrease in the mineral found in surface sediments
at various depths in the same area (Figure 7.40). These results indicate that the lysocline
0
1
2
3
4
5
Depth (m)
0
1000
2000
3000
4000
5000
6000
N. Atlantic
N. Pacific
Ω Aragonite
Figure 7.37
The depth profile of the aragonite saturation state for the Atlantic and Pacific Oceans.
Latitude
Depth (m)
ermodynamic
Saturation Depth
Calcium Carbonate
Compensation Depth
(CCD)
–60
–40
–20
0
20
40
60
0
1000
2000
3000
4000
5000
6000
Figure 7.38
Comparisons of the thermodynamic saturation state Ω and calcium carbonate compensation depths (CCDs) in
the Atlantic Ocean.
The Carbonate System
(coccoliths, foram shells, reagent calcite, and pteropod shells) in chambers through which
seawater was drawn (Figure 7.39). The aragonite lysocline was found to be higher than
the value for calcite in the water column. The depth of the lysocline found by suspending
CaCO 3 (s) agrees very well with the decrease in the mineral found in surface sediments
at various depths in the same area (Figure 7.40). These results indicate that the lysocline
0
1
2
3
4
5
Depth (m)
0
1000
2000
3000
4000
5000
6000
N. Atlantic
N. Pacific
Ω Aragonite
Figure 7.37
The depth profile of the aragonite saturation state for the Atlantic and Pacific Oceans.
Latitude
Depth (m)
ermodynamic
Saturation Depth
Calcium Carbonate
Compensation Depth
(CCD)
–60
–40
–20
0
20
40
60
0
1000
2000
3000
4000
5000
6000
Figure 7.38
Comparisons of the thermodynamic saturation state Ω and calcium carbonate compensation depths (CCDs) in
the Atlantic Ocean.