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Chemical Oceanography, 4th Edition
c. The combination of shallow and deep generation is inferred from the nutrient
type profiles of Ni and Se (see Figure 3.11 and Figure 3.12). Recent results for
Ag also show this mixed type of behavior (Figure 3.13). These metals appear to
be affected by phytoplankton and diatoms or calcifiers.
The recent profiles for Ni, Zn, and Cd in the North Atlantic and Pacific Oceans by
Biller and Bruland (2012) are similar to the earlier results. Their new results for
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Cd (pM)
PO 4 (µm)
Figure 3.7
Plot of cadmium as a function of phosphate.
Ba (nmol kg
–1 )
Depth (m)
0
1000
2000
3000
4000
5000
40 60 80 40 60 80 40 60 80
60
54
40
Si (µmol kg
–1 )
0
1000
2000
3000
4000
5000
60
54
40
0
0 20 40
80
60
20 40
0
60
20 40 60
Figure 3.8
Comparison of barium (Ba) and silica (Si) profiles in the South Atlantic.