olm.calcite.calc_kappa4Theory

olm.calcite.calc_kappa4Theory(T_K, PCO2, a_H2CO3s)

Calculates kappa4 in the PWP equation using the theoretical relation for kappa4 from Plummer, Wigley, and Parkhurst (1978) Equation 25 (as described in Dreybrodt [1988] equation 6.22b). In this case, a_H in the equation for kappa4 is the equilibrium surface value for the given carbonic acid concentration, as specified in the theory.

Parameters:

T_K : float

temperature Kelvin

PCO2 : float

partial pressure of CO2 (atm)

a_H2CO3s : float

activity of carbonic acid (mol/L)

Returns:

kappa4 : float

constant kappa4 in the PWP equation (cm/s)

Notes

See more info under documentation for pwpRateTheory().