gsw_frazil_properties: Properties of Frazil ice

View source: R/gsw.R

gsw_frazil_propertiesR Documentation

Properties of Frazil ice


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


gsw_frazil_properties(SA_bulk, h_bulk, p)



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


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.



SA_bulk <- c(  34.7118,   34.8915,   35.0256,   34.8472,   34.7366,   34.7324)
h_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(SA_bulk, h_bulk, p)
stopifnot(all.equal(r$SA_final, c(39.111030663000442, 39.407625769681573, 39.595789974885108,
                                  39.481230045372889, 39.591177095552503, 39.826467709177123)))
stopifnot(all.equal(r$CT_final, c(-2.156311126114311, -2.204672298963783, -2.273689262333450,
                                  -2.363714136353600, -2.644541000680772, -2.977651291726651)))
stopifnot(all.equal(r$w_Ih_final, c(0.112480560814322, 0.114600300867556, 0.115421108602301,
                                    0.117372990660305, 0.122617649983886, 0.127906590822347)))

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