gsw_chem_potential_water_t_exact: Chemical Potential of Water in Seawater

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gsw_chem_potential_water_t_exactR Documentation

Chemical Potential of Water in Seawater


Chemical Potential of Water in Seawater


gsw_chem_potential_water_t_exact(SA, t, p)



Absolute Salinity [ g/kg ]


in-situ temperature (ITS-90) [ degC ]


sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar


chemical potential [ J/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 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 website. Therefore, in the interests of making GSW-R be self-contained, a copy was downloaded from on 2022-05-25, the .mat file was stored in the developer/create_data directory of, and then the dataset used in GSW-R was created based on that .mat file.

Please consult to learn more about the various TEOS-10 software systems.


See Also

Other things related to chemical potential: gsw_chem_potential_water_ice()


SA <- c(34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324)
t <- c(28.7856, 28.4329, 22.8103, 10.2600,  6.8863,  4.4036)
p <- c(      10,       50,      125,      250,      600,      1000)
pot <- gsw_chem_potential_water_t_exact(SA, t, p)
stopifnot(all.equal(pot, c(-8.545561146284534, -8.008085548342105, -5.103980139874876,
                           -0.634067782745442, 3.335566803473286, 7.555434445971858)))

gsw documentation built on Oct. 16, 2022, 5:06 p.m.