Skip to contents

Properties of Frazil ice i.t.o. potential enthalpy (polynomial version)

Source: R/gsw.R
gsw_frazil_properties_potential_poly.Rd

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

Usage

gsw_frazil_properties_potential_poly(SA_bulk, h_pot_bulk, p)

Arguments

SA_bulk

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

h_pot_bulk

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

p

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

Value

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 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_frazil_properties_potential_poly.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_enthalpy_t_exact(), gsw_frazil_properties_potential(), 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_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_poly(SA_bulk, h_pot_bulk, p)
stopifnot(all.equal(r$SA_final, c(39.098264696022831, 39.343217436835218, 39.434244243586633,
                                  39.159511498029801, 38.820458704205542, 38.542256756176229)))
stopifnot(all.equal(r$CT_final, c(-2.155537691991377, -2.200841508940901, -2.264094318382661,
                                  -2.344613208230164, -2.598663953454472, -2.900948531145453)))
stopifnot(all.equal(r$w_Ih_final, c(0.112190777010854, 0.113150823111566, 0.111797356032850,
                                    0.110121687760246, 0.105198620534670, 0.098848824039493)))