Also note that they are talking about acidification. 7.0 is
neutral. Anything less than 7.0 is acid. Anything about 7.0 is alkaline.
A change from 8.13 to 8.08 (if it were real) is the water becoming more
neutral."
more
neutral."----does NOT equal better....
Table: Concentrations of carbonate system species in seawater
|
Preindustrial atmospheric CO2 |
2x Preindustrial CO2 |
Atmospheric CO2 (µatm)
|
280 µatm
|
560 µatm
|
Carbonic acid H2CO3 (µmol/kg seawater)
|
9
|
18
|
Bicarbonate HCO3 (µmol/kg seawater)
|
1757
|
1975
|
Carbonate CO32- (µmol/kg seawater)
|
239
|
151
|
Total carbon species TCO2 (µmol/kg seawater)
|
2005
|
2144
|
Total alkalinity TA (µmol/kg seawater)
|
2345
|
2345
|
pH
|
8.18
|
7.93
|
Ω-aragonite
|
3.72
|
2.35
|
These values were calculated using the “Mehrbach refit” carbonate
system constants (Dickson and Millero, 1987, Deep-Sea Research), KSO4
dissociation constant from Dickson (1990, Journal of Chemical
Thermodynamics), and the total pH scale.—J. Kleypas, A. Dickson, D.
McCorkle