Geoscience Reference
In-Depth Information
Data (1994)
Perturbation (2100)
0
0
2300
200
2260
2220
2180
2140
2100
2060
160
120
80
40
20
10
1000
1000
2000
2000
C T
d C T
3000
3000
90°S
60°S
30°S
30°N
60°N
90°N
90°S
60°S
30°S
30°N
60°N
90°N
0
0
8.2
-0.03
-0.05
-0.10
-0.20
-0.30
-0.35
-0.40
-0.45
8.1
1000
1000
8
2000
2000
7.9
7.8
dpH
pH
3000
90°S
3000
60°S
30°S
30°N
60°N
90°N
90°S
60°S
30°S
30°N
60°N
90°N
0
0
220
200
180
160
140
120
100
80
70
-5
-10
-20
-40
-60
-80
-100
-120
1000
1000
2000
2000
CO 2 3
dCO 2-
3
3000
90°S
3000
90°S
60°S
30°S
30°N
60°N
90°N
60°S
30°S
30°N
60°N
90°N
Latitude
Latitude
Figure 3.5 Zonal-mean sections in the Atlantic Ocean for C T (top), pH T (middle), and [CO 3 2- ] (bottom). Results are given for the observed state in 1994
(left), based on the GLODAP data, and the pre-industrial to 2100 perturbation (right), indicated as ' δ ', based on the IS92a median projection from the
OCMIP study. In the left column the dashed white line indicates the depth of penetration of the perturbation in 1994, dei ned here as the depth where the
concentration drops to half of the global-ocean average of the surface perturbation in the same year. These 'half' contours are 22.5 μmol kg -1 for δ C T (top),
-0.038 units for δ pH T (middle), and -14.5 μmol kg -1 for δ [CO 3 2- ] (bottom). The lower right panel includes the contour lines for the aragonite saturation
horizon in 1994 (dashed) and 2100 (solid).
 
 
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