gsw_frazil_properties_potential: Properties of Frazil ice i.t.o. potential enthalpy

View source: R/gsw.R

gsw_frazil_properties_potentialR Documentation

Properties of Frazil ice i.t.o. potential enthalpy


Calculation of Absolute Salinity, Conservative Temperature, and ice mass fraction based on bulk Absolute Salinity, bulk potential enthalpy, and pressure


gsw_frazil_properties_potential(SA_bulk, h_pot_bulk, p)



Absolute Salinity of a combination of seawater and ice [ g/kg ]


potential enthalpy of a mixture of seawater and ice [ J/kg ]


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


a list containing SA_final, h_final and w_Ih_final.

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_CT_exact(), 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_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_bulk <- c(     34.7118,   34.8915,   35.0256,   34.8472,   34.7366,   34.7324)
h_pot_bulk <- c(-4.5544e4, -4.6033e4, -4.5830e4, -4.5589e4, -4.4948e4, -4.4027e4)
p <- c(                 10,        50,       125,       250,       600,      1000)
r <- gsw_frazil_properties_potential(SA_bulk, h_pot_bulk, p)
stopifnot(all.equal(r$SA_final, c(39.098258701462051, 39.343217598625756, 39.434254585716296,
                                  39.159536295126657, 38.820511558004590, 38.542322667924459)))
stopifnot(all.equal(r$CT_final, c(-2.155553336670014, -2.200844802695826, -2.264077329325076,
                                  -2.344567015865174, -2.598559540430464, -2.900814843304696)))
stopifnot(all.equal(r$w_Ih_final, c(0.112190640891586, 0.113150826758543, 0.111797588975174,
                                    0.110122251260246, 0.105199838799201, 0.098850365110330)))

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