|
Source of constants |
Input | Input | Input | Input | Output | Output | Output | ||||||||||||
| DIC | Si(OH)4 | PO4 | fCO2@4°C | TAlk | fCO2@20°C |  fCO2@20°C/DIC | |||||||||||||
| Roy et al. (1993) | 2260 | 135 | 2.3 | 531.8 | 2371.3 | 1080 | 7.1 | ||||||||||||
| Goyet and Poisson (1989) | 2260 | 135 | 2.3 | 531.8 | 2371.3 | 1076.4 | 7.1 | ||||||||||||
| Hansson (1973a,b) refit by Dickson and Millero (1987) | 2260 | 135 | 2.3 | 531.8 | 2377.4 | 1018.8 | 6.7 | ||||||||||||
| Mehrbach et al. (1973) refit by Dickson and Millero (1987) | 2260 | 135 | 2.3 | 531.8 | 2368.4 | 1033.0 | 7 | ||||||||||||
| Dickson and Millero (1987) refit of Hansson/Mehrbach | 2260 | 135 | 2.3 | 531.8 | 2372.5 | 1042.7 | 6.9 | ||||||||||||
| GEOSECS (Takahashi et al. 1982) | 2260 | 135 | 2.3 | 531.8 | 2367.2 | 1016.8 | 6.9 | ||||||||||||
| Peng et al. (1987) | 2260 | 135 | 2.3 | 531.8 | 2378.1 | 1013.3 | 6.7 | ||||||||||||
| aAll values were calculated using theQUICKBASIC computer program of Lewis and Wallace (1998) with the default values for the secondary constants;the correction
from 4°C to 20°C can cause the resulting pCO2 to differ by 65 µatm depending on the
constants used. The fCO2@20°C/DIC values in µatm/(µmol/kg) show that in Pacific
deep water a precision of 1.5 µmol/kg in DIC corresponds to approximately 10 µatm in fCO2. |
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