20
F.J. Millero
Table 1.4. Changes in the CO2 system due to the dissolution of CaC03 (Millero 1997)
Initial (mM)
ilCaC0 3 (mM)
0.05
0.10
ilC0 2
0
0.05
0.10
TC0 2
2.200
2.250
2.300
CA
2.487
2.587
2.687
CO 2
350
310
290
pH
8.200
8.264
8.321
[CO 2 ]
0.012
0.011
0.010
[HCO;]
1.889
1.892
1.844
[CO~-]
0.299
0.348
0.397
10
5
CA(mM)
0
reo] (mM)
l
011
-5
C\
c:
"'
..c:
U
--reo 1
- 10
--CA
-l::r-- pH
-15
-0- Peo 2
- 20
0
0.05
0.1
llAOU(mM)
Fig. 1.7. Changes in parameters of the carbonate system due to the dissolution of CaC03 (Millero 1996)
This equation has also been shown by Chen (1978) to predict reasonable ratios of
Inorg C/Org C in ocean waters. Later we will examine how these relationships can be
used to determine the excess CO 2 that penetrates the oceans due to the anthropogenic
increase of CO 2 in the atmosphere due to the burning of fossil fuels.