## Contents

## USAGE:

O2sol = gsw_O2sol(SA,CT,p,long,lat)

## DESCRIPTION:

Calculates the oxygen, O2, concentration expected at equilibrium with
air at an Absolute Pressure of 101325 Pa (sea pressure of 0 dbar)
including saturated water vapor. This function uses the solubility coefficients
derived from the data of Benson and Krause (1984), as fitted by Garcia
and Gordon (1992, 1993).

Note that this algorithm has not been approved by IOC and is not work
from SCOR/IAPSO Working Group 127. It is included in the GSW
Oceanographic Toolbox as it seems to be oceanographic best practice.

## INPUT:

SA = Absolute Salinity [ g/kg ]
CT = Conservative Temperature [ deg C ]
p = sea pressure [ dbar ]
(i.e. absolute pressure - 10.1325 dbar)
long = longitude in decimal degrees [ 0 ... +360 ]
or [ -180 ... +180 ]
lat = latitude in decimal degrees north [ -90 ... +90 ]

SA & CT need to have the same dimensions. p, lat and long may have
dimensions 1x1 or Mx1 or 1xN or MxN, where SA and CT are MxN.

## OUTPUT:

O2sol = solubility of oxygen [ umol/kg ]

## EXAMPLE:

SA = [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
CT = [28.8099; 28.4392; 22.7862; 10.2262; 6.8272; 4.3236;]
p = [ 10; 50; 125; 250; 600; 1000;]
lat = [ 4; 4; 4; 4; 4; 4;]
long = [ 188; 188; 188; 188; 188; 188;]

O2sol = gsw_O2sol(SA,CT,p,long,lat)

O2sol =

1.0e+002 *

1.949651126384804
1.958728907684003
2.148922307892045
2.738656506758550
2.955109771828408
3.133584919106894

## AUTHOR:

Roberta Hamme, Paul Barker and Trevor McDougall [ help@teos-10.org ]

## VERSION NUMBER:

3.05 (16th February, 2015)

## REFERENCES:

IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of
seawater - 2010: Calculation and use of thermodynamic properties.
Intergovernmental Oceanographic Commission, Manuals and Guides No. 56,
UNESCO (English), 196 pp. Available from the TEOS-10 web site.

Benson, B.B., and D. Krause, 1984: The concentration and isotopic
fractionation of oxygen dissolved in freshwater and seawater in
equilibrium with the atmosphere. *Limnology and Oceanography*, **29**,
620-632.

Garcia, H.E., and L.I. Gordon, 1992: Oxygen solubility in seawater:
Better fitting equations. *Limnology and Oceanography*, **37**, 1307-1312.

Garcia, H.E., and L.I. Gordon, 1993: Erratum: Oxygen solubility in
seawater: better fitting equations. *Limnology and Oceanography*, **38**,
656.

The software is available from http://www.TEOS-10.org