R: Coefficients used for pressure-correcting the equilibrium...

Pcoeffs {seacarb} | R Documentation

## Coefficients used for pressure-correcting the equilibrium constants

### Description

Pressure corrections are based on the following equations:

\ln{\frac{K_{i}^{P}}{K_{i}^{0}}} = -\frac{Δ V_{i}}{RT}.P + 0.5\frac{Δ K_{i}}{RT}.P^{2}

with

Δ V_{i} = a_{0} + a_{1}T + a_{2}T^{2}

and

Δ K_{i} = b_{0} + b_{1}T + b_{2}T^{2}

The variables are:

- K indicating the type of equilibrium constant

- coefficient a_0

- coefficient a_1

- coefficient a_2

- coefficient b_0

- coefficient b_1

- coefficient b_2

### Usage

    Pcoeffs

### Format

A data frame with 14 rows and 7 variables

### Details

For Kb, to be consistent with Millero (1979) a2 was changed to -2.608e-3 instead of 2.608e-3 (value given in Millero, 1995) For Kw, coefficients are from Millero (1983).

### Source

Millero F. J., 1979 The thermodynamics of the carbonate system in seawater. Geochemica et Cosmochemica Acta 43: 1651-1661.

Millero F. J., 1983 Influence of pressure on chemical processes in the sea. pp. 1-88. In J. P. Riley and R. Chester (eds.), Chemical Oceanography. Academic Press, New York.

Millero F. J., 1995 Thermodynamics of the carbon dioxide system in the oceans. Geochimica Cosmochimica Acta 59: 661-677.

### See Also

Pcorrect

[Package seacarb version 3.1.1 Index]