Calculate properties related to seaice melting in seawater

Usage

gsw_melting_seaice_into_seawater(SA, CT, p, w_seaice, SA_seaice, t_seaice)

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_seaice: mass fraction (seaice) / (water + seaice)
SA_seaice: Absolute Salinity of seaice
t_seaice: temperature of seaice

Value

a list containing SA_final and CT_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_melting_seaice_into_seawater.html

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_seaice <- c( 0.0560, 0.02513, 0.02159, 0.01210, 0.00943, 0.00751)
SA_seaice <- c(     5,     4.8,     3.5,     2.5,       1,     0.4)
t_seaice <- c(-4.7856, -4.4329, -3.8103, -4.2600, -3.8863, -3.4036)
r <- gsw_melting_seaice_into_seawater(SA, CT, p, w_seaice, SA_seaice, t_seaice)
stopifnot(all.equal(r$SA_final, c(33.047939199999995, 34.135300604999998, 34.344962295999999,
                                  34.455798880000003, 34.418463862000003, 34.474563675999995)))
stopifnot(all.equal(r$CT_final, c(-0.018822367305381, 0.345095540241769, 0.020418581143151,
                                  0.242672380976922, -0.111078380121959, -0.197363471215418)))