gsw_pot_enthalpy_ice_freezing {gsw} | R Documentation |
Potential Enthalpy of Ice at Freezing Point
gsw_pot_enthalpy_ice_freezing(SA, p, saturation_fraction = 1)
SA |
Absolute Salinity [ g/kg ] |
p |
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar |
saturation_fraction |
fraction of air in water [unitless] |
The present R function works with a wrapper to a C function contained within the GSW-C system (Version 3.05-4 dated 2017-08-07, available at https://github.com/TEOS-10/GSW-C, as git commit '5b4d959e54031f9e972f3e863f63e67fa4f5bfec'), which stems from the GSW-Fortran system (https://github.com/TEOS-10/GSW-Fortran) which in turn stems from the GSW-Matlab system (https://github.com/TEOS-10/GSW-Matlab). Consult http://www.teos-10.org to learn more about these software systems, their authorships, and the science behind it all.
potential enthalpy [ J/kg ]
1. The C source underlying this function lacks an argument, saturation_fraction
,
which is present in the Matlab source, and so that argument is ignored here.
2. The R code does not reproduce the check values stated at http://www.teos-10.org/pubs/gsw/html/gsw_pot_enthalpy_ice_freezing.html. Those values are incorporated in the test provided in “Examples”, so that test is not performed during build tests. See https://github.com/TEOS-10/GSW-R/issues/27.
http://www.teos-10.org/pubs/gsw/html/gsw_pot_enthalpy_ice_freezing.html
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_frazil_properties_potential
,
gsw_pot_enthalpy_from_pt_ice_poly
,
gsw_pot_enthalpy_from_pt_ice
,
gsw_pot_enthalpy_ice_freezing_poly
,
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) p <- c( 10, 50, 125, 250, 600, 1000) saturation_fraction = 1 e <- gsw_pot_enthalpy_ice_freezing(SA, p, saturation_fraction) ## Not run: expect_equal(e/1e5, c(-3.373409558967978, -3.374434164002012, -3.376117536928847, -3.378453698871986, -3.385497832886802, -3.393768587631489)) ## End(Not run)