gsw_enthalpy_CT_exact: Seawater Specific Enthalpy in terms of Conservative...

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gsw_enthalpy_CT_exactR Documentation

Seawater Specific Enthalpy in terms of Conservative Temperature


Seawater Specific Enthalpy in terms of Conservative Temperature


gsw_enthalpy_CT_exact(SA, CT, p)



Absolute Salinity [ g/kg ]


Conservative Temperature [ degC ]


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


specific enthalpy [ 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 enthalpy: gsw_CT_from_enthalpy(), gsw_dynamic_enthalpy(), gsw_enthalpy_diff(), gsw_enthalpy_first_derivatives_CT_exact(), gsw_enthalpy_first_derivatives(), gsw_enthalpy_ice(), gsw_enthalpy_t_exact(), gsw_enthalpy(), gsw_frazil_properties_potential_poly(), gsw_frazil_properties_potential(), gsw_pot_enthalpy_from_pt_ice_poly(), gsw_pot_enthalpy_from_pt_ice(), gsw_pot_enthalpy_ice_freezing_poly(), gsw_pot_enthalpy_ice_freezing(), gsw_pt_from_pot_enthalpy_ice_poly(), gsw_pt_from_pot_enthalpy_ice(), gsw_specvol_first_derivatives_wrt_enthalpy(), gsw_specvol_first_derivatives()


SA <- c(34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324)
CT <- c(28.8099, 28.4392, 22.7862, 10.2262,  6.8272,  4.3236)
p <- c(      10,      50,     125,     250,     600,    1000)
e <- gsw_enthalpy_CT_exact(SA, CT, p)
stopifnot(all.equal(e/1e5, c(1.151031813321767, 1.140146925586514, 0.921800131787836,
                             0.432553712315790, 0.330871615358722, 0.269706848807403)))

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