gsw_enthalpy_t_exact: Seawater Specific Enthalpy in terms of in-situ Temperature

In TEOS-10/GSW-R: Gibbs Sea Water Functions

Seawater Specific Enthalpy in terms of in-situ Temperature

Description

Seawater Specific Enthalpy in terms of in-situ Temperature

Usage

gsw_enthalpy_t_exact(SA, t, p)

Arguments

SA	Absolute Salinity [ g/kg ]. The valid range for most 'gsw' functions is 0 to 42 g/kg.
t	in-situ temperature (ITS-90) [ degC ]
p	sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar

Value

specific enthalpy [ J/kg ]

Implementation Note

This R function uses a wrapper to a C function contained within the GSW-C system as updated 2022-10-11 at https://github.com/TEOS-10/GSW-C with git commit '657216dd4f5ea079b5f0e021a4163e2d26893371'.

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_enthalpy_t_exact.html

See Also

Other things related to enthalpy: gsw_CT_from_enthalpy(), gsw_dynamic_enthalpy(), gsw_enthalpy(), gsw_enthalpy_CT_exact(), gsw_enthalpy_diff(), gsw_enthalpy_first_derivatives(), gsw_enthalpy_first_derivatives_CT_exact(), gsw_enthalpy_ice(), gsw_frazil_properties_potential(), gsw_frazil_properties_potential_poly(), gsw_pot_enthalpy_from_pt_ice(), gsw_pot_enthalpy_from_pt_ice_poly(), gsw_pot_enthalpy_ice_freezing(), gsw_pot_enthalpy_ice_freezing_poly(), gsw_pt_from_pot_enthalpy_ice(), gsw_pt_from_pot_enthalpy_ice_poly(), gsw_specvol_first_derivatives(), gsw_specvol_first_derivatives_wrt_enthalpy()

Examples

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)
e <- gsw_enthalpy_t_exact(SA, t, p)
stopifnot(all.equal(e/1e5, c(1.151032604783763, 1.140148036012021, 0.921799209310966,
                             0.432553283808897, 0.330872159700175, 0.269705880448018)))

TEOS-10/GSW-R documentation built on April 14, 2025, 12:46 p.m.