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Figure 7.10
Anthropogenic
carbon concentrations in three
ocean systems. Note that most of
the CO
2
resides above the 1000-m
depth.
From the global CO
2
survey by the
National Oceanic and Atmospheric
Administration, and R. A. Feely, C. L.
Sabine, T. Takahashi, and R.
Wanninkhof, “Uptake and storage of
carbon dioxide in the ocean: the global
CO
2
survey,”
Oceanography
, 14(4),
18-32 (2001).
0
1000
2000
3000
4000
5000
Atlantic
6000
0
60°S
50°
40°
30°
20°
10°
0°
10°
20°
30°
40°
50°
60°
70°N
1000
2000
Anthropogenic CO
2
3000
4000
0 0 0 0
40
50
60
moL Kg
-1
)
(
µ
5000
Indian
6000
60°S
50°
40°
30°
20°
10°
0°
10°
20°N
0
1000
2000
3000
4000
5000
Pacific
6000
60°S
50°
40°
30°
20°
10°
0°
10°
20°
30°
40°
50°N
Latitude
be worse from the disease. Adding iron could certainly adversely affect other
parts of the ocean ecosystems. The best decisions are those that account for
all possible outcomes, certainly not those hoped for. Such an approach would
probably include tests in laboratories, stepped up to prototypes on as many possible
scenarios and species possible, before actual implementation.
The entire area of enhanced carbon sequestration is very promising. Fig-
ure 7.11 shows a number of venues in which this green engineering approach
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