K_SiOH4 function

K_SiOH4

PUBLIC function: calculates the dissociation constant of SiOH4

K_SiOH4(S, t, p=0, SumH2SO4=NULL, SumHF=NULL, khf="dickson", khso4="dickson")

Arguments

• S: salinity in practical salinity units (i.e. no unit)
• t: temperature in degrees centigrade
• p: gauge pressure (total pressure minus atmospheric pressure) in bars
• SumH2SO4: total sulfate concentration in mol/kg-solution (calculated from S if not supplied)
• SumHF: total fluoride concentration in mol/kg-solution (calculated from S if not supplied)
• khf: S, t relation for K_HF needed for scale conversion: either "dickson" (default, Dickson1979a) or "perez" (Perez1987a)
• khso4: S, t relation for K_HSO4 needed for scale conversion: either "dickson" (default, Dickson1990) or "khoo" (Khoo1977)

Returns

the dissociation constant of SiOH4 in mol/kg-solution on the free proton pH scale

Examples

K_SiOH4(35, 15)
K_SiOH4(35, 15, 10)
K_SiOH4(S=35, t=15, p=10, SumH2SO4=0.03)
plot(K_SiOH4(35, 1:25), xlab="temperature / degC")

Author(s)

Andreas F. Hofmann. Maintained by Karline Soetaert (Karline.Soetaert@nioz.nl).

References

Millero1988, DOE1994, Millero1995