gsw_melting_ice_into_seawater function

Calculate properties related to ice melting in seawater

gsw_melting_ice_into_seawater(SA, CT, p, w_Ih, t_Ih)

Arguments

• SA: Absolute Salinity [ g/kg ]. The valid range for most gsw functions is 0 to 42 g/kg.
• CT: Conservative Temperature [ degC ].
• p: sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar
• w_Ih: initial mass fraction (ice) / (water + ice)
• t_Ih: initial temperature of ice [ degC ]

Returns

a list containing SA_final, CT_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.

Examples

SA <- c(  34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324)
CT <- c(   4.7856,  2.4329,  1.8103,  1.2600,  0.6886,  0.4403)
p <- c(        10,      50,     125,     250,     600,    1000)
w_Ih <- c( 0.0560, 0.02513, 0.02159, 0.01210, 0.00943, 0.00751)
t_Ih <- c(-4.7856, -4.4329, -3.8103, -4.2600, -3.8863, -3.4036)
r <- gsw_melting_ice_into_seawater(SA, CT, p, w_Ih, t_Ih)
stopifnot(all.equal(r$SA_final, c(32.767939199999994, 34.014676604999998, 34.269397295999994,
                                  34.425548880000001, 34.409033862000001, 34.471559675999998)))
stopifnot(all.equal(r$CT_final, c(-0.298448911022612, 0.215263001418312, -0.074341719211557,
                                  0.207796293045473, -0.123785388299875, -0.202531182809225)))
stopifnot(all.equal(r$w_Ih_final, rep(0, 6)))

References

http://www.teos-10.org/pubs/gsw/html/gsw_melting_ice_into_seawater.html