Practical Salinity from Salinometer Reading — gsw_SP

Calculate Practical Salinity from salinometer readings of conductivity ratio and bath temperature.

Usage

gsw_SP_salinometer(ratio, temperature)

Arguments

ratio: Conductivity ratio [ unitless ]. (This is called Rt in the GSW documentation.)
temperature: Bath temperature [ degC ]. (This is called t in the GSW documentation.)

Value

Practical salinity on the PSS-77 scale [ unitless ]

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_SP_salinometer.html

Examples

ratio <- c( 0.9345,  0.95123,  0.91807,  0.8886, 0.8169, 0.6687)
temperature <-  c(28.7856, 28.4329, 22.8103, 10.2600, 6.8863, 4.4036)
SP <- gsw_SP_salinometer(ratio, temperature)
stopifnot(all.equal(SP,
        c(32.431728787558541, 33.085035719966307, 31.800791917322833,
            30.692490757036179, 27.979281308696116, 22.474597460508491)))