seacarb (version 3.3.3)

sa2sp_chem: From absolute to practical salinity

Description

Converts from absolute to practical salinity (SP). Salinity conversion depends on total alkalinity as well as the concentrations of dissolved inorganic carbon, nitrate and silicate.

Usage

sa2sp_chem(SA, TA=2300e-6, DIC=2000e-6, NO3=0, SIOH4=0)

Value

SP

Practical salinity (in psu)

Arguments

SA

Absolute salinity in g/kg

TA

Total alkalinity, in mol/kg, default is 2300 µmol/kg

DIC

Dissolved inorganic carbon concentration in mol/kg, default is 2000 µmol/kg

NO3

Total nitrate concentration in mol/kg, default is 0

SIOH4

Total silicate concentration in mol/kg, default is 0

Author

Jean-Marie Epitalon

Details

Convert from absolute to practical salinity from carbon system parameters and ion concentration which most affect water density anomalies.

References

McDougall T. J., Jackett D. R., Millero F. J., Pawlowicz R. and Barker P. M., 2012. A global algorithm for estimating Absolute Salinity. Ocean Science 8, 1123-1134.

Pawlowicz R., Wright D. G. and Millero F. J., 2011. The effects of biogeochemical processes on oceanic conductivity/salinity/density relationships and the characterization of real seawater. Ocean Science 7, 363-387.

Pawlowicz R., 2013. What every oceanographer needs to know about TEOS-10 (The TEOS-10 Primer). http://www.teos-10.org/

See Also

sp2sa_chem does the reverse, sa2sp_geo

Examples

   # Calculate the practical salinity of a sample with Absolute Salinity of 35 g/kg,
   # Total Alkalinity of 0.00234 mol/kg and DIC of 0.00202 mol/kg
   SP <- sa2sp_chem(SA=35, TA=0.00234, DIC=0.00202)