Oxygen Solubility in Seawater (UNESCO variables)

Computes oxygen concentration for seawater that is equilibrium with vapour-saturated air at standard atmospheric pressure (101.325 kPa, i.e. for sea pressure of 0dbar). The formula, not created by the SCOR/IAPSO Working Group 127 nor approved by the IOC, is stated in the TEOS-10 documentation to be from Benson and Krause (1984), as fitted by Garcia and Gordon (1992, 1993). That formulation is framed in UNESCO-era water properties; see gsw_O2sol for the corresponding computation in GSW variables.

gsw_O2sol_SP_pt(SP, pt)

Arguments

SP: Practical Salinity (PSS-78) [ unitless ]
pt: potential temperature (ITS-90) [ degC ]

Value

Oxygen solubility in micro-moles per kg.

Implementation Note

This R function uses a wrapper to a C function contained within the GSW-C system as updated 2021-12-28 at https://github.com/TEOS-10/GSW-C with git commit `98f0fd40dd9ceb0ba82c9d47ac750e935a7d0459`.

The C function uses data from the library/gsw_data_v3_0.mat file provided in the GSW-Matlab source code, version 3.06-11. Unfortunately, this version of the mat file is no longer displayed on the TEOS-10.org website. Therefore, in the interests of making GSW-R be self-contained, a copy was downloaded from http://www.teos-10.org/software/gsw_matlab_v3_06_11.zip on 2022-05-25, the .mat file was stored in the developer/create_data directory of https://github.com/TEOS-10/GSW-R, and then the dataset used in GSW-R was created based on that .mat file.

Please consult http://www.teos-10.org to learn more about the various TEOS-10 software systems.

References

http://www.teos-10.org/pubs/gsw/html/gsw_O2sol_SP_pt.html

Examples

SP <- c(34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324)
pt <- c(28.8099, 28.4392, 22.7862, 10.2262,  6.8272,  4.3236)
O2sol <- gsw_O2sol_SP_pt(SP, pt)
stopifnot(all.equal(O2sol/100, c(1.946825431692940, 1.956135062814438,
            2.146559360234014, 2.735652832698713, 2.951580761415903,
            3.129598716631408)))